brainy/src/storage/adapters/azureBlobStorage.ts
David Snelling aba15638dc fix: critical clear() data persistence regression (v5.10.4)
Workshop team reported that brain.clear() doesn't fully delete persistent storage.
After calling clear() and creating a new Brainy instance, all data was restored
from storage. This is a CRITICAL data integrity bug.

Root causes (3 bugs fixed):
1. **FileSystemStorage deleting wrong directory**: Data stored in branches/main/entities/
   but clear() was only deleting old pre-v5.4.0 structure (nouns/, verbs/, metadata/)
2. **COW reinitialization after clear()**: Setting cowEnabled=false on old instance
   doesn't affect new instances. Fixed with persistent marker file.
3. **Metadata index cache not cleared**: find() with type filters returned stale data
   after clear(). Fixed by recreating MetadataIndexManager.

Changes:
- FileSystemStorage: Clear branches/ directory (where data actually lives)
- All storage adapters: Add checkClearMarker()/createClearMarker() methods
- BaseStorage: Check for cow-disabled marker before initializing COW
- Brainy: Recreate metadataIndex after clear() to flush cached data
- Tests: Comprehensive regression suite (8 tests) to prevent recurrence

Fixes Workshop bug report: /media/dpsifr/storage/home/Projects/workshop/BRAINY_V5_10_2_CLEAR_BUG.md

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
2025-11-17 10:44:35 -08:00

2202 lines
74 KiB
TypeScript

/**
* Azure Blob Storage Adapter (Native)
* Uses the native @azure/storage-blob library for optimal performance and authentication
*
* Supports multiple authentication methods:
* 1. DefaultAzureCredential (Managed Identity) - Automatic in Azure environments
* 2. Connection String
* 3. Storage Account Key
* 4. SAS Token
* 5. Azure AD (OAuth2) via DefaultAzureCredential
*
* v4.0.0: Fully compatible with metadata/vector separation architecture
*/
import {
GraphVerb,
HNSWNoun,
HNSWVerb,
NounMetadata,
VerbMetadata,
HNSWNounWithMetadata,
HNSWVerbWithMetadata,
StatisticsData,
NounType
} from '../../coreTypes.js'
import {
BaseStorage,
StorageBatchConfig,
NOUNS_DIR,
VERBS_DIR,
METADATA_DIR,
INDEX_DIR,
SYSTEM_DIR,
STATISTICS_KEY,
getDirectoryPath
} from '../baseStorage.js'
import { BrainyError } from '../../errors/brainyError.js'
import { CacheManager } from '../cacheManager.js'
import { createModuleLogger, prodLog } from '../../utils/logger.js'
import { getGlobalBackpressure } from '../../utils/adaptiveBackpressure.js'
import { getWriteBuffer, WriteBuffer } from '../../utils/writeBuffer.js'
import { getCoalescer, RequestCoalescer } from '../../utils/requestCoalescer.js'
import { getShardIdFromUuid, getAllShardIds, getShardIdByIndex, TOTAL_SHARDS } from '../sharding.js'
// Type aliases for better readability
type HNSWNode = HNSWNoun
type Edge = HNSWVerb
// Azure SDK types - dynamically imported to avoid issues in browser environments
type BlobServiceClient = any
type ContainerClient = any
type BlockBlobClient = any
// Azure Blob Storage API limits
const MAX_AZURE_PAGE_SIZE = 5000
/**
* Native Azure Blob Storage adapter for server environments
* Uses the @azure/storage-blob library with DefaultAzureCredential
*
* Authentication priority:
* 1. DefaultAzureCredential (Managed Identity) - if no credentials provided
* 2. Connection String - if connectionString provided
* 3. Storage Account Key - if accountName + accountKey provided
* 4. SAS Token - if accountName + sasToken provided
*
* v5.4.0: Type-aware storage now built into BaseStorage
* - Removed 10 *_internal method overrides (now inherit from BaseStorage's type-first implementation)
* - Removed pagination overrides
* - Updated HNSW methods to use BaseStorage's getNoun/saveNoun (type-first paths)
* - All operations now use type-first paths: entities/nouns/{type}/vectors/{shard}/{id}.json
*/
export class AzureBlobStorage extends BaseStorage {
private blobServiceClient: BlobServiceClient | null = null
private containerClient: ContainerClient | null = null
private containerName: string
private accountName?: string
private accountKey?: string
private connectionString?: string
private sasToken?: string
// Prefixes for different types of data
private nounPrefix: string
private verbPrefix: string
private metadataPrefix: string // Noun metadata
private verbMetadataPrefix: string // Verb metadata
private systemPrefix: string // System data (_system)
// Statistics caching for better performance
protected statisticsCache: StatisticsData | null = null
// Backpressure and performance management
private pendingOperations: number = 0
private consecutiveErrors: number = 0
private lastErrorReset: number = Date.now()
// Adaptive backpressure for automatic flow control
private backpressure = getGlobalBackpressure()
// Write buffers for bulk operations
private nounWriteBuffer: WriteBuffer<HNSWNode> | null = null
private verbWriteBuffer: WriteBuffer<Edge> | null = null
// Request coalescer for deduplication
private requestCoalescer: RequestCoalescer | null = null
// High-volume mode detection
private highVolumeMode = false
private lastVolumeCheck = 0
private volumeCheckInterval = 1000 // Check every second
private forceHighVolumeMode = false // Environment variable override
// Multi-level cache manager for efficient data access
private nounCacheManager: CacheManager<HNSWNode>
private verbCacheManager: CacheManager<Edge>
// Module logger
private logger = createModuleLogger('AzureBlobStorage')
// v5.4.0: HNSW mutex locks to prevent read-modify-write races
private hnswLocks = new Map<string, Promise<void>>()
/**
* Initialize the storage adapter
* @param options Configuration options for Azure Blob Storage
*/
constructor(options: {
containerName: string
// Connection String authentication (highest priority)
connectionString?: string
// Account + Key authentication
accountName?: string
accountKey?: string
// SAS Token authentication
sasToken?: string
// Cache and operation configuration
cacheConfig?: {
hotCacheMaxSize?: number
hotCacheEvictionThreshold?: number
warmCacheTTL?: number
}
readOnly?: boolean
}) {
super()
this.containerName = options.containerName
this.connectionString = options.connectionString
this.accountName = options.accountName
this.accountKey = options.accountKey
this.sasToken = options.sasToken
this.readOnly = options.readOnly || false
// Set up prefixes for different types of data using entity-based structure
this.nounPrefix = `${getDirectoryPath('noun', 'vector')}/`
this.verbPrefix = `${getDirectoryPath('verb', 'vector')}/`
this.metadataPrefix = `${getDirectoryPath('noun', 'metadata')}/` // Noun metadata
this.verbMetadataPrefix = `${getDirectoryPath('verb', 'metadata')}/` // Verb metadata
this.systemPrefix = `${SYSTEM_DIR}/` // System data
// Initialize cache managers
this.nounCacheManager = new CacheManager<HNSWNode>(options.cacheConfig)
this.verbCacheManager = new CacheManager<Edge>(options.cacheConfig)
// Check for high-volume mode override
if (typeof process !== 'undefined' && process.env?.BRAINY_FORCE_HIGH_VOLUME === 'true') {
this.forceHighVolumeMode = true
this.highVolumeMode = true
prodLog.info('🚀 High-volume mode FORCED via BRAINY_FORCE_HIGH_VOLUME environment variable')
}
}
/**
* Get Azure Blob-optimized batch configuration
*
* Azure Blob Storage has moderate rate limits between GCS and S3:
* - Medium batch sizes (75 items)
* - Parallel processing supported
* - Moderate delays (75ms)
*
* Azure can handle ~2000 operations/second with good performance
*
* @returns Azure Blob-optimized batch configuration
* @since v4.11.0
*/
public getBatchConfig(): StorageBatchConfig {
return {
maxBatchSize: 75,
batchDelayMs: 75,
maxConcurrent: 75,
supportsParallelWrites: true, // Azure handles parallel reasonably
rateLimit: {
operationsPerSecond: 2000, // Moderate limits
burstCapacity: 500
}
}
}
/**
* Initialize the storage adapter
*/
public async init(): Promise<void> {
if (this.isInitialized) {
return
}
try {
// Import Azure Storage SDK only when needed
const { BlobServiceClient } = await import('@azure/storage-blob')
// Configure the Azure Blob Storage client based on available credentials
// Priority 1: Connection String
if (this.connectionString) {
this.blobServiceClient = BlobServiceClient.fromConnectionString(this.connectionString)
prodLog.info('🔐 Azure: Using Connection String')
}
// Priority 2: Account Name + Key
else if (this.accountName && this.accountKey) {
const { StorageSharedKeyCredential } = await import('@azure/storage-blob')
const sharedKeyCredential = new StorageSharedKeyCredential(
this.accountName,
this.accountKey
)
this.blobServiceClient = new BlobServiceClient(
`https://${this.accountName}.blob.core.windows.net`,
sharedKeyCredential
)
prodLog.info('🔐 Azure: Using Account Key')
}
// Priority 3: SAS Token
else if (this.accountName && this.sasToken) {
this.blobServiceClient = new BlobServiceClient(
`https://${this.accountName}.blob.core.windows.net${this.sasToken}`
)
prodLog.info('🔐 Azure: Using SAS Token')
}
// Priority 4: DefaultAzureCredential (Managed Identity)
else if (this.accountName) {
const { DefaultAzureCredential } = await import('@azure/identity')
const credential = new DefaultAzureCredential()
this.blobServiceClient = new BlobServiceClient(
`https://${this.accountName}.blob.core.windows.net`,
credential
)
prodLog.info('🔐 Azure: Using DefaultAzureCredential (Managed Identity)')
}
else {
throw new Error('Azure Blob Storage requires either connectionString, accountName+accountKey, accountName+sasToken, or accountName (for Managed Identity)')
}
// Get reference to the container
this.containerClient = this.blobServiceClient.getContainerClient(this.containerName)
// Create container if it doesn't exist
const exists = await this.containerClient.exists()
if (!exists) {
await this.containerClient.create()
prodLog.info(`✅ Created Azure container: ${this.containerName}`)
} else {
prodLog.info(`✅ Connected to Azure container: ${this.containerName}`)
}
// Initialize write buffers for high-volume mode
const storageId = `azure-${this.containerName}`
this.nounWriteBuffer = getWriteBuffer<HNSWNode>(
`${storageId}-nouns`,
'noun',
async (items) => {
await this.flushNounBuffer(items)
}
)
this.verbWriteBuffer = getWriteBuffer<Edge>(
`${storageId}-verbs`,
'verb',
async (items) => {
await this.flushVerbBuffer(items)
}
)
// Initialize request coalescer for deduplication
this.requestCoalescer = getCoalescer(
storageId,
async (batch) => {
// Process coalesced operations (placeholder for future optimization)
this.logger.trace(`Processing coalesced batch: ${batch.length} items`)
}
)
// Initialize counts from storage
await this.initializeCounts()
// Clear any stale cache entries from previous runs
prodLog.info('🧹 Clearing cache from previous run to prevent cache poisoning')
this.nounCacheManager.clear()
this.verbCacheManager.clear()
prodLog.info('✅ Cache cleared - starting fresh')
this.isInitialized = true
} catch (error) {
this.logger.error('Failed to initialize Azure Blob Storage:', error)
throw new Error(`Failed to initialize Azure Blob Storage: ${error}`)
}
}
/**
* Get the Azure blob name for a noun using UUID-based sharding
*
* Uses first 2 hex characters of UUID for consistent sharding.
* Path format: entities/nouns/vectors/{shardId}/{uuid}.json
*
* @example
* getNounKey('ab123456-1234-5678-9abc-def012345678')
* // returns 'entities/nouns/vectors/ab/ab123456-1234-5678-9abc-def012345678.json'
*/
private getNounKey(id: string): string {
const shardId = getShardIdFromUuid(id)
return `${this.nounPrefix}${shardId}/${id}.json`
}
/**
* Get the Azure blob name for a verb using UUID-based sharding
*
* Uses first 2 hex characters of UUID for consistent sharding.
* Path format: entities/verbs/vectors/{shardId}/{uuid}.json
*
* @example
* getVerbKey('cd987654-4321-8765-cba9-fed543210987')
* // returns 'entities/verbs/vectors/cd/cd987654-4321-8765-cba9-fed543210987.json'
*/
private getVerbKey(id: string): string {
const shardId = getShardIdFromUuid(id)
return `${this.verbPrefix}${shardId}/${id}.json`
}
/**
* Override base class method to detect Azure-specific throttling errors
*/
protected isThrottlingError(error: any): boolean {
// First check base class detection
if (super.isThrottlingError(error)) {
return true
}
// Azure-specific throttling detection
const statusCode = error.statusCode || error.code
const message = error.message?.toLowerCase() || ''
return (
statusCode === 429 || // Too Many Requests
statusCode === 503 || // Service Unavailable
statusCode === 'ServerBusy' ||
statusCode === 'IngressOverLimit' ||
statusCode === 'EgressOverLimit' ||
message.includes('throttl') ||
message.includes('rate limit') ||
message.includes('too many requests')
)
}
/**
* Override base class to enable smart batching for cloud storage
*
* Azure Blob Storage is cloud storage with network latency (~50ms per write).
* Smart batching reduces writes from 1000 ops → 100 batches.
*
* @returns true (Azure is cloud storage)
*/
protected isCloudStorage(): boolean {
return true // Azure benefits from batching
}
/**
* Apply backpressure before starting an operation
* @returns Request ID for tracking
*/
private async applyBackpressure(): Promise<string> {
const requestId = `${Date.now()}-${Math.random().toString(36).substr(2, 9)}`
await this.backpressure.requestPermission(requestId, 1)
this.pendingOperations++
return requestId
}
/**
* Release backpressure after completing an operation
* @param success Whether the operation succeeded
* @param requestId Request ID from applyBackpressure()
*/
private releaseBackpressure(success: boolean = true, requestId?: string): void {
this.pendingOperations = Math.max(0, this.pendingOperations - 1)
if (requestId) {
this.backpressure.releasePermission(requestId, success)
}
}
/**
* Check if high-volume mode should be enabled
*/
private checkVolumeMode(): void {
if (this.forceHighVolumeMode) {
return // Already forced on
}
const now = Date.now()
if (now - this.lastVolumeCheck < this.volumeCheckInterval) {
return
}
this.lastVolumeCheck = now
// Enable high-volume mode if we have many pending operations
const shouldEnable = this.pendingOperations > 20
if (shouldEnable && !this.highVolumeMode) {
this.highVolumeMode = true
prodLog.info('🚀 High-volume mode ENABLED (pending operations:', this.pendingOperations, ')')
} else if (!shouldEnable && this.highVolumeMode && !this.forceHighVolumeMode) {
this.highVolumeMode = false
prodLog.info('🐌 High-volume mode DISABLED (pending operations:', this.pendingOperations, ')')
}
}
/**
* Flush noun buffer to Azure
*/
private async flushNounBuffer(items: Map<string, HNSWNode>): Promise<void> {
const writes = Array.from(items.values()).map(async (noun) => {
try {
await this.saveNodeDirect(noun)
} catch (error) {
this.logger.error(`Failed to flush noun ${noun.id}:`, error)
}
})
await Promise.all(writes)
}
/**
* Flush verb buffer to Azure
*/
private async flushVerbBuffer(items: Map<string, Edge>): Promise<void> {
const writes = Array.from(items.values()).map(async (verb) => {
try {
await this.saveEdgeDirect(verb)
} catch (error) {
this.logger.error(`Failed to flush verb ${verb.id}:`, error)
}
})
await Promise.all(writes)
}
// v5.4.0: Removed saveNoun_internal - now inherit from BaseStorage's type-first implementation
/**
* Save a node to storage
*/
protected async saveNode(node: HNSWNode): Promise<void> {
await this.ensureInitialized()
// ALWAYS check if we should use high-volume mode (critical for detection)
this.checkVolumeMode()
// Use write buffer in high-volume mode
if (this.highVolumeMode && this.nounWriteBuffer) {
this.logger.trace(`📝 BUFFERING: Adding noun ${node.id} to write buffer (high-volume mode active)`)
await this.nounWriteBuffer.add(node.id, node)
return
} else if (!this.highVolumeMode) {
this.logger.trace(`📝 DIRECT WRITE: Saving noun ${node.id} directly (high-volume mode inactive)`)
}
// Direct write in normal mode
await this.saveNodeDirect(node)
}
/**
* Save a node directly to Azure (bypass buffer)
*/
private async saveNodeDirect(node: HNSWNode): Promise<void> {
// Apply backpressure before starting operation
const requestId = await this.applyBackpressure()
try {
this.logger.trace(`Saving node ${node.id}`)
// Convert connections Map to a serializable format
// CRITICAL: Only save lightweight vector data (no metadata)
// Metadata is saved separately via saveNounMetadata() (2-file system)
const serializableNode = {
id: node.id,
vector: node.vector,
connections: Object.fromEntries(
Array.from(node.connections.entries()).map(([level, nounIds]) => [
level,
Array.from(nounIds)
])
),
level: node.level || 0
// NO metadata field - saved separately for scalability
}
// Get the Azure blob name with UUID-based sharding
const blobName = this.getNounKey(node.id)
// Save to Azure Blob Storage
const blockBlobClient = this.containerClient!.getBlockBlobClient(blobName)
await blockBlobClient.upload(
JSON.stringify(serializableNode, null, 2),
JSON.stringify(serializableNode).length,
{
blobHTTPHeaders: { blobContentType: 'application/json' }
}
)
// CRITICAL FIX: Only cache nodes with non-empty vectors
// This prevents cache pollution from HNSW's lazy-loading nodes (vector: [])
if (node.vector && Array.isArray(node.vector) && node.vector.length > 0) {
this.nounCacheManager.set(node.id, node)
}
// Note: Empty vectors are intentional during HNSW lazy mode - not logged
// Increment noun count
const metadata = await this.getNounMetadata(node.id)
if (metadata && metadata.type) {
await this.incrementEntityCountSafe(metadata.type as string)
}
this.logger.trace(`Node ${node.id} saved successfully`)
this.releaseBackpressure(true, requestId)
} catch (error: any) {
this.releaseBackpressure(false, requestId)
// Handle throttling
if (this.isThrottlingError(error)) {
await this.handleThrottling(error)
throw error // Re-throw for retry at higher level
}
this.logger.error(`Failed to save node ${node.id}:`, error)
throw new Error(`Failed to save node ${node.id}: ${error}`)
}
}
// v5.4.0: Removed getNoun_internal - now inherit from BaseStorage's type-first implementation
/**
* Get a node from storage
*/
protected async getNode(id: string): Promise<HNSWNode | null> {
await this.ensureInitialized()
// Check cache first
const cached: HNSWNode | null = await this.nounCacheManager.get(id)
// Validate cached object before returning
if (cached !== undefined && cached !== null) {
// Validate cached object has required fields (including non-empty vector!)
if (!cached.id || !cached.vector || !Array.isArray(cached.vector) || cached.vector.length === 0) {
// Invalid cache detected - log and auto-recover
prodLog.warn(`[Azure] Invalid cached object for ${id.substring(0, 8)} (${
!cached.id ? 'missing id' :
!cached.vector ? 'missing vector' :
!Array.isArray(cached.vector) ? 'vector not array' :
'empty vector'
}) - removing from cache and reloading`)
this.nounCacheManager.delete(id)
// Fall through to load from Azure
} else {
// Valid cache hit
this.logger.trace(`Cache hit for noun ${id}`)
return cached
}
} else if (cached === null) {
prodLog.warn(`[Azure] Cache contains null for ${id.substring(0, 8)} - reloading from storage`)
}
// Apply backpressure
const requestId = await this.applyBackpressure()
try {
this.logger.trace(`Getting node ${id}`)
// Get the Azure blob name with UUID-based sharding
const blobName = this.getNounKey(id)
// Download from Azure Blob Storage
const blockBlobClient = this.containerClient!.getBlockBlobClient(blobName)
const downloadResponse = await blockBlobClient.download(0)
const downloaded = await this.streamToBuffer(downloadResponse.readableStreamBody!)
// Parse JSON
const data = JSON.parse(downloaded.toString())
// Convert serialized connections back to Map<number, Set<string>>
const connections = new Map<number, Set<string>>()
for (const [level, nounIds] of Object.entries(data.connections || {})) {
connections.set(Number(level), new Set(nounIds as string[]))
}
// CRITICAL: Only return lightweight vector data (no metadata)
// Metadata is retrieved separately via getNounMetadata() (2-file system)
const node: HNSWNode = {
id: data.id,
vector: data.vector,
connections,
level: data.level || 0
// NO metadata field - retrieved separately for scalability
}
// CRITICAL FIX: Only cache valid nodes with non-empty vectors (never cache null or empty)
if (node && node.id && node.vector && Array.isArray(node.vector) && node.vector.length > 0) {
this.nounCacheManager.set(id, node)
} else {
prodLog.warn(`[Azure] Not caching invalid node ${id.substring(0, 8)} (missing id/vector or empty vector)`)
}
this.logger.trace(`Successfully retrieved node ${id}`)
this.releaseBackpressure(true, requestId)
return node
} catch (error: any) {
this.releaseBackpressure(false, requestId)
// Check if this is a "not found" error
if (error.statusCode === 404 || error.code === 'BlobNotFound') {
this.logger.trace(`Node not found: ${id}`)
// CRITICAL FIX: Do NOT cache null values
return null
}
// Handle throttling
if (this.isThrottlingError(error)) {
await this.handleThrottling(error)
throw error
}
// All other errors should throw, not return null
this.logger.error(`Failed to get node ${id}:`, error)
throw BrainyError.fromError(error, `getNoun(${id})`)
}
}
// v5.4.0: Removed deleteNoun_internal - now inherit from BaseStorage's type-first implementation
/**
* Write an object to a specific path in Azure
* Primitive operation required by base class
* @protected
*/
protected async writeObjectToPath(path: string, data: any): Promise<void> {
await this.ensureInitialized()
try {
this.logger.trace(`Writing object to path: ${path}`)
const blockBlobClient = this.containerClient!.getBlockBlobClient(path)
const content = JSON.stringify(data, null, 2)
await blockBlobClient.upload(content, content.length, {
blobHTTPHeaders: { blobContentType: 'application/json' }
})
this.logger.trace(`Object written successfully to ${path}`)
} catch (error) {
this.logger.error(`Failed to write object to ${path}:`, error)
throw new Error(`Failed to write object to ${path}: ${error}`)
}
}
/**
* Read an object from a specific path in Azure
* Primitive operation required by base class
* @protected
*/
protected async readObjectFromPath(path: string): Promise<any | null> {
await this.ensureInitialized()
try {
this.logger.trace(`Reading object from path: ${path}`)
const blockBlobClient = this.containerClient!.getBlockBlobClient(path)
const downloadResponse = await blockBlobClient.download(0)
const downloaded = await this.streamToBuffer(downloadResponse.readableStreamBody!)
const data = JSON.parse(downloaded.toString())
this.logger.trace(`Object read successfully from ${path}`)
return data
} catch (error: any) {
// Check if this is a "not found" error
if (error.statusCode === 404 || error.code === 'BlobNotFound') {
this.logger.trace(`Object not found at ${path}`)
return null
}
this.logger.error(`Failed to read object from ${path}:`, error)
throw BrainyError.fromError(error, `readObjectFromPath(${path})`)
}
}
/**
* Delete an object from a specific path in Azure
* Primitive operation required by base class
* @protected
*/
protected async deleteObjectFromPath(path: string): Promise<void> {
await this.ensureInitialized()
try {
this.logger.trace(`Deleting object at path: ${path}`)
const blockBlobClient = this.containerClient!.getBlockBlobClient(path)
await blockBlobClient.delete()
this.logger.trace(`Object deleted successfully from ${path}`)
} catch (error: any) {
// If already deleted (404), treat as success
if (error.statusCode === 404 || error.code === 'BlobNotFound') {
this.logger.trace(`Object at ${path} not found (already deleted)`)
return
}
this.logger.error(`Failed to delete object from ${path}:`, error)
throw new Error(`Failed to delete object from ${path}: ${error}`)
}
}
/**
* Batch delete multiple blobs from Azure Blob Storage
* Deletes up to 256 blobs per batch (Azure limit)
* Handles throttling, retries, and partial failures
*
* @param keys - Array of blob names (paths) to delete
* @param options - Configuration options for batch deletion
* @returns Statistics about successful and failed deletions
*/
public async batchDelete(
keys: string[],
options: {
maxRetries?: number
retryDelayMs?: number
continueOnError?: boolean
} = {}
): Promise<{
totalRequested: number
successfulDeletes: number
failedDeletes: number
errors: Array<{ key: string; error: string }>
}> {
await this.ensureInitialized()
const {
maxRetries = 3,
retryDelayMs = 1000,
continueOnError = true
} = options
if (!keys || keys.length === 0) {
return {
totalRequested: 0,
successfulDeletes: 0,
failedDeletes: 0,
errors: []
}
}
this.logger.info(`Starting batch delete of ${keys.length} blobs`)
const stats = {
totalRequested: keys.length,
successfulDeletes: 0,
failedDeletes: 0,
errors: [] as Array<{ key: string; error: string }>
}
// Chunk keys into batches of max 256 (Azure limit)
const MAX_BATCH_SIZE = 256
const batches: string[][] = []
for (let i = 0; i < keys.length; i += MAX_BATCH_SIZE) {
batches.push(keys.slice(i, i + MAX_BATCH_SIZE))
}
this.logger.debug(`Split ${keys.length} keys into ${batches.length} batches`)
// Process each batch
for (let batchIndex = 0; batchIndex < batches.length; batchIndex++) {
const batch = batches[batchIndex]
let retryCount = 0
let batchSuccess = false
while (retryCount <= maxRetries && !batchSuccess) {
const requestId = await this.applyBackpressure()
try {
const { BlobBatchClient } = await import('@azure/storage-blob')
this.logger.debug(
`Processing batch ${batchIndex + 1}/${batches.length} with ${batch.length} blobs (attempt ${retryCount + 1}/${maxRetries + 1})`
)
// Create batch client
const batchClient = this.containerClient!.getBlobBatchClient()
// Execute batch delete
const deletePromises = batch.map((key) => {
const blobClient = this.containerClient!.getBlockBlobClient(key)
return blobClient.url
})
// Use batch delete
const batchDeleteResponse = await batchClient.deleteBlobs(
batch.map(key => this.containerClient!.getBlockBlobClient(key).url),
{
// Additional options can be added here
}
)
this.logger.debug(
`Batch ${batchIndex + 1} completed`
)
// Process results
for (let i = 0; i < batch.length; i++) {
const key = batch[i]
const subResponse = batchDeleteResponse.subResponses[i]
if (subResponse.status === 202 || subResponse.status === 404) {
// 202 Accepted = successful delete
// 404 Not Found = already deleted (treat as success)
stats.successfulDeletes++
if (subResponse.status === 404) {
this.logger.trace(`Blob ${key} already deleted (404)`)
}
} else {
// Deletion failed
stats.failedDeletes++
stats.errors.push({
key,
error: `HTTP ${subResponse.status}: ${subResponse.errorCode || 'Unknown error'}`
})
this.logger.error(
`Failed to delete ${key}: ${subResponse.status} - ${subResponse.errorCode}`
)
}
}
this.releaseBackpressure(true, requestId)
batchSuccess = true
} catch (error: any) {
this.releaseBackpressure(false, requestId)
// Handle throttling
if (this.isThrottlingError(error)) {
this.logger.warn(
`Batch ${batchIndex + 1} throttled, waiting before retry...`
)
await this.handleThrottling(error)
retryCount++
if (retryCount <= maxRetries) {
const delay = retryDelayMs * Math.pow(2, retryCount - 1) // Exponential backoff
await new Promise((resolve) => setTimeout(resolve, delay))
}
continue
}
// Handle other errors
this.logger.error(
`Batch ${batchIndex + 1} failed (attempt ${retryCount + 1}/${maxRetries + 1}):`,
error
)
if (retryCount < maxRetries) {
retryCount++
const delay = retryDelayMs * Math.pow(2, retryCount - 1)
await new Promise((resolve) => setTimeout(resolve, delay))
continue
}
// Max retries exceeded
if (continueOnError) {
// Mark all keys in this batch as failed and continue to next batch
for (const key of batch) {
stats.failedDeletes++
stats.errors.push({
key,
error: error.message || String(error)
})
}
this.logger.error(
`Batch ${batchIndex + 1} failed after ${maxRetries} retries, continuing to next batch`
)
batchSuccess = true // Mark as "handled" to move to next batch
} else {
// Stop processing and throw error
throw BrainyError.storage(
`Batch delete failed at batch ${batchIndex + 1}/${batches.length} after ${maxRetries} retries. Total: ${stats.successfulDeletes} deleted, ${stats.failedDeletes} failed`,
error instanceof Error ? error : undefined
)
}
}
}
}
this.logger.info(
`Batch delete completed: ${stats.successfulDeletes}/${stats.totalRequested} successful, ${stats.failedDeletes} failed`
)
return stats
}
/**
* List all objects under a specific prefix in Azure
* Primitive operation required by base class
* @protected
*/
protected async listObjectsUnderPath(prefix: string): Promise<string[]> {
await this.ensureInitialized()
try {
this.logger.trace(`Listing objects under prefix: ${prefix}`)
const paths: string[] = []
for await (const blob of this.containerClient!.listBlobsFlat({ prefix })) {
if (blob.name) {
paths.push(blob.name)
}
}
this.logger.trace(`Found ${paths.length} objects under ${prefix}`)
return paths
} catch (error) {
this.logger.error(`Failed to list objects under ${prefix}:`, error)
throw new Error(`Failed to list objects under ${prefix}: ${error}`)
}
}
/**
* Helper: Convert Azure stream to buffer
*/
private async streamToBuffer(readableStream: NodeJS.ReadableStream): Promise<Buffer> {
return new Promise((resolve, reject) => {
const chunks: Buffer[] = []
readableStream.on('data', (data) => {
chunks.push(data instanceof Buffer ? data : Buffer.from(data))
})
readableStream.on('end', () => {
resolve(Buffer.concat(chunks))
})
readableStream.on('error', reject)
})
}
// v5.4.0: Removed saveVerb_internal - now inherit from BaseStorage's type-first implementation
/**
* Save an edge to storage
*/
protected async saveEdge(edge: Edge): Promise<void> {
await this.ensureInitialized()
// Check volume mode
this.checkVolumeMode()
// Use write buffer in high-volume mode
if (this.highVolumeMode && this.verbWriteBuffer) {
this.logger.trace(`📝 BUFFERING: Adding verb ${edge.id} to write buffer`)
await this.verbWriteBuffer.add(edge.id, edge)
return
}
// Direct write in normal mode
await this.saveEdgeDirect(edge)
}
/**
* Save an edge directly to Azure (bypass buffer)
*/
private async saveEdgeDirect(edge: Edge): Promise<void> {
const requestId = await this.applyBackpressure()
try {
this.logger.trace(`Saving edge ${edge.id}`)
// Convert connections Map to serializable format
// ARCHITECTURAL FIX: Include core relational fields in verb vector file
// These fields are essential for 90% of operations - no metadata lookup needed
const serializableEdge = {
id: edge.id,
vector: edge.vector,
connections: Object.fromEntries(
Array.from(edge.connections.entries()).map(([level, verbIds]) => [
level,
Array.from(verbIds)
])
),
// CORE RELATIONAL DATA (v4.0.0)
verb: edge.verb,
sourceId: edge.sourceId,
targetId: edge.targetId,
// User metadata (if any) - saved separately for scalability
// metadata field is saved separately via saveVerbMetadata()
}
// Get the Azure blob name with UUID-based sharding
const blobName = this.getVerbKey(edge.id)
// Save to Azure
const blockBlobClient = this.containerClient!.getBlockBlobClient(blobName)
await blockBlobClient.upload(
JSON.stringify(serializableEdge, null, 2),
JSON.stringify(serializableEdge).length,
{
blobHTTPHeaders: { blobContentType: 'application/json' }
}
)
// Update cache
this.verbCacheManager.set(edge.id, edge)
// Count tracking happens in baseStorage.saveVerbMetadata_internal (v4.1.2)
// This fixes the race condition where metadata didn't exist yet
this.logger.trace(`Edge ${edge.id} saved successfully`)
this.releaseBackpressure(true, requestId)
} catch (error: any) {
this.releaseBackpressure(false, requestId)
if (this.isThrottlingError(error)) {
await this.handleThrottling(error)
throw error
}
this.logger.error(`Failed to save edge ${edge.id}:`, error)
throw new Error(`Failed to save edge ${edge.id}: ${error}`)
}
}
// v5.4.0: Removed getVerb_internal - now inherit from BaseStorage's type-first implementation
/**
* Get an edge from storage
*/
protected async getEdge(id: string): Promise<Edge | null> {
await this.ensureInitialized()
// Check cache first
const cached = this.verbCacheManager.get(id)
if (cached) {
this.logger.trace(`Cache hit for verb ${id}`)
return cached
}
const requestId = await this.applyBackpressure()
try {
this.logger.trace(`Getting edge ${id}`)
// Get the Azure blob name with UUID-based sharding
const blobName = this.getVerbKey(id)
// Download from Azure
const blockBlobClient = this.containerClient!.getBlockBlobClient(blobName)
const downloadResponse = await blockBlobClient.download(0)
const downloaded = await this.streamToBuffer(downloadResponse.readableStreamBody!)
// Parse JSON
const data = JSON.parse(downloaded.toString())
// Convert serialized connections back to Map
const connections = new Map<number, Set<string>>()
for (const [level, verbIds] of Object.entries(data.connections || {})) {
connections.set(Number(level), new Set(verbIds as string[]))
}
// v4.0.0: Return HNSWVerb with core relational fields (NO metadata field)
const edge: Edge = {
id: data.id,
vector: data.vector,
connections,
// CORE RELATIONAL DATA (read from vector file)
verb: data.verb,
sourceId: data.sourceId,
targetId: data.targetId
// ✅ NO metadata field in v4.0.0
// User metadata retrieved separately via getVerbMetadata()
}
// Update cache
this.verbCacheManager.set(id, edge)
this.logger.trace(`Successfully retrieved edge ${id}`)
this.releaseBackpressure(true, requestId)
return edge
} catch (error: any) {
this.releaseBackpressure(false, requestId)
// Check if this is a "not found" error
if (error.statusCode === 404 || error.code === 'BlobNotFound') {
this.logger.trace(`Edge not found: ${id}`)
return null
}
if (this.isThrottlingError(error)) {
await this.handleThrottling(error)
throw error
}
this.logger.error(`Failed to get edge ${id}:`, error)
throw BrainyError.fromError(error, `getVerb(${id})`)
}
}
// v5.4.0: Removed deleteVerb_internal - now inherit from BaseStorage's type-first implementation
// v5.4.0: Removed getNounsWithPagination - now inherit from BaseStorage's type-first implementation
// v5.4.0: Removed getNounsByNounType_internal - now inherit from BaseStorage's type-first implementation
// v5.4.0: Removed 3 verb query *_internal methods (getVerbsBySource, getVerbsByTarget, getVerbsByType) - now inherit from BaseStorage's type-first implementation
/**
* Clear all data from storage
*/
public async clear(): Promise<void> {
await this.ensureInitialized()
try {
this.logger.info('🧹 Clearing all data from Azure container...')
// Delete all blobs in container
// v5.6.1: listBlobsFlat() returns ALL blobs including _cow/ prefix
// This correctly deletes COW version control data (commits, trees, blobs, refs)
for await (const blob of this.containerClient!.listBlobsFlat()) {
if (blob.name) {
const blockBlobClient = this.containerClient!.getBlockBlobClient(blob.name)
await blockBlobClient.delete()
}
}
// CRITICAL: Reset COW state to prevent automatic reinitialization
// When COW data is cleared, we must also clear the COW managers
// Otherwise initializeCOW() will auto-recreate initial commit on next operation
this.refManager = undefined
this.blobStorage = undefined
this.commitLog = undefined
this.cowEnabled = false
// v5.10.4: Create persistent marker blob (CRITICAL FIX)
// Bug: cowEnabled = false only affects current instance, not future instances
// Fix: Create marker blob that persists across instance restarts
// When new instance calls initializeCOW(), it checks for this marker
await this.createClearMarker()
// Clear caches
this.nounCacheManager.clear()
this.verbCacheManager.clear()
// Reset counts
this.totalNounCount = 0
this.totalVerbCount = 0
this.entityCounts.clear()
this.verbCounts.clear()
this.logger.info('✅ All data cleared from Azure')
} catch (error) {
this.logger.error('Failed to clear Azure storage:', error)
throw new Error(`Failed to clear Azure storage: ${error}`)
}
}
/**
* Get storage status
*/
public async getStorageStatus(): Promise<{
type: string
used: number
quota: number | null
details?: Record<string, any>
}> {
await this.ensureInitialized()
try {
const properties = await this.containerClient!.getProperties()
return {
type: 'azure',
used: 0, // Azure doesn't provide usage info easily
quota: null, // No quota in Azure Blob Storage
details: {
container: this.containerName,
lastModified: properties.lastModified,
etag: properties.etag
}
}
} catch (error) {
this.logger.error('Failed to get storage status:', error)
return {
type: 'azure',
used: 0,
quota: null
}
}
}
/**
* Check if COW has been explicitly disabled via clear()
* v5.10.4: Fixes bug where clear() doesn't persist across instance restarts
* @returns true if marker blob exists, false otherwise
* @protected
*/
protected async checkClearMarker(): Promise<boolean> {
await this.ensureInitialized()
try {
const markerPath = `${this.systemPrefix}cow-disabled`
const blockBlobClient = this.containerClient!.getBlockBlobClient(markerPath)
const exists = await blockBlobClient.exists()
return exists
} catch (error) {
this.logger.warn('AzureBlobStorage.checkClearMarker: Error checking marker', error)
return false
}
}
/**
* Create marker indicating COW has been explicitly disabled
* v5.10.4: Called by clear() to prevent COW reinitialization on new instances
* @protected
*/
protected async createClearMarker(): Promise<void> {
await this.ensureInitialized()
try {
const markerPath = `${this.systemPrefix}cow-disabled`
const blockBlobClient = this.containerClient!.getBlockBlobClient(markerPath)
// Create empty marker blob
await blockBlobClient.upload(Buffer.from(''), 0, {
blobHTTPHeaders: { blobContentType: 'text/plain' }
})
} catch (error) {
this.logger.error('AzureBlobStorage.createClearMarker: Failed to create marker blob', error)
// Don't throw - marker creation failure shouldn't break clear()
}
}
/**
* Save statistics data to storage
*/
protected async saveStatisticsData(statistics: StatisticsData): Promise<void> {
await this.ensureInitialized()
try {
const key = `${this.systemPrefix}${STATISTICS_KEY}.json`
this.logger.trace(`Saving statistics to ${key}`)
const blockBlobClient = this.containerClient!.getBlockBlobClient(key)
const content = JSON.stringify(statistics, null, 2)
await blockBlobClient.upload(content, content.length, {
blobHTTPHeaders: { blobContentType: 'application/json' }
})
this.logger.trace('Statistics saved successfully')
} catch (error) {
this.logger.error('Failed to save statistics:', error)
throw new Error(`Failed to save statistics: ${error}`)
}
}
/**
* Get statistics data from storage
*/
protected async getStatisticsData(): Promise<StatisticsData | null> {
await this.ensureInitialized()
try {
const key = `${this.systemPrefix}${STATISTICS_KEY}.json`
this.logger.trace(`Getting statistics from ${key}`)
const blockBlobClient = this.containerClient!.getBlockBlobClient(key)
const downloadResponse = await blockBlobClient.download(0)
const downloaded = await this.streamToBuffer(downloadResponse.readableStreamBody!)
const statistics = JSON.parse(downloaded.toString())
this.logger.trace('Statistics retrieved successfully')
// CRITICAL FIX: Populate totalNodes and totalEdges from in-memory counts
return {
...statistics,
totalNodes: this.totalNounCount,
totalEdges: this.totalVerbCount,
lastUpdated: new Date().toISOString()
}
} catch (error: any) {
if (error.statusCode === 404 || error.code === 'BlobNotFound') {
// Statistics file doesn't exist yet (first restart)
this.logger.trace('Statistics file not found - returning minimal stats with counts')
return {
nounCount: {},
verbCount: {},
metadataCount: {},
hnswIndexSize: 0,
totalNodes: this.totalNounCount,
totalEdges: this.totalVerbCount,
totalMetadata: 0,
lastUpdated: new Date().toISOString()
}
}
this.logger.error('Failed to get statistics:', error)
return null
}
}
/**
* Initialize counts from storage
*/
protected async initializeCounts(): Promise<void> {
const key = `${this.systemPrefix}counts.json`
try {
const blockBlobClient = this.containerClient!.getBlockBlobClient(key)
const downloadResponse = await blockBlobClient.download(0)
const downloaded = await this.streamToBuffer(downloadResponse.readableStreamBody!)
const counts = JSON.parse(downloaded.toString())
this.totalNounCount = counts.totalNounCount || 0
this.totalVerbCount = counts.totalVerbCount || 0
this.entityCounts = new Map(Object.entries(counts.entityCounts || {})) as Map<string, number>
this.verbCounts = new Map(Object.entries(counts.verbCounts || {})) as Map<string, number>
prodLog.info(`📊 Loaded counts from storage: ${this.totalNounCount} nouns, ${this.totalVerbCount} verbs`)
} catch (error: any) {
if (error.statusCode === 404 || error.code === 'BlobNotFound') {
// No counts file yet - initialize from scan (first-time setup)
prodLog.info('📊 No counts file found - this is normal for first init')
await this.initializeCountsFromScan()
} else {
// CRITICAL FIX: Don't silently fail on network/permission errors
this.logger.error('❌ CRITICAL: Failed to load counts from Azure:', error)
prodLog.error(`❌ Error loading ${key}: ${error.message}`)
// Try to recover by scanning the container
prodLog.warn('⚠️ Attempting recovery by scanning Azure container...')
await this.initializeCountsFromScan()
}
}
}
/**
* Initialize counts from storage scan (expensive - only for first-time init)
*/
private async initializeCountsFromScan(): Promise<void> {
try {
prodLog.info('📊 Scanning Azure container to initialize counts...')
// Count nouns
let nounCount = 0
for await (const blob of this.containerClient!.listBlobsFlat({ prefix: this.nounPrefix })) {
if (blob.name && blob.name.endsWith('.json')) {
nounCount++
}
}
this.totalNounCount = nounCount
// Count verbs
let verbCount = 0
for await (const blob of this.containerClient!.listBlobsFlat({ prefix: this.verbPrefix })) {
if (blob.name && blob.name.endsWith('.json')) {
verbCount++
}
}
this.totalVerbCount = verbCount
// Save initial counts
if (this.totalNounCount > 0 || this.totalVerbCount > 0) {
await this.persistCounts()
prodLog.info(`✅ Initialized counts from scan: ${this.totalNounCount} nouns, ${this.totalVerbCount} verbs`)
} else {
prodLog.warn(`⚠️ No entities found during container scan. Check that entities exist and prefixes are correct.`)
}
} catch (error) {
// CRITICAL FIX: Don't silently fail - this prevents data loss scenarios
this.logger.error('❌ CRITICAL: Failed to initialize counts from Azure container scan:', error)
throw new Error(`Failed to initialize Azure storage counts: ${error}. This prevents container restarts from working correctly.`)
}
}
/**
* Persist counts to storage
*/
protected async persistCounts(): Promise<void> {
try {
const key = `${this.systemPrefix}counts.json`
const counts = {
totalNounCount: this.totalNounCount,
totalVerbCount: this.totalVerbCount,
entityCounts: Object.fromEntries(this.entityCounts),
verbCounts: Object.fromEntries(this.verbCounts),
lastUpdated: new Date().toISOString()
}
const blockBlobClient = this.containerClient!.getBlockBlobClient(key)
const content = JSON.stringify(counts, null, 2)
await blockBlobClient.upload(content, content.length, {
blobHTTPHeaders: { blobContentType: 'application/json' }
})
} catch (error) {
this.logger.error('Error persisting counts:', error)
}
}
/**
* Get a noun's vector for HNSW rebuild
* v5.4.0: Uses BaseStorage's getNoun (type-first paths)
*/
public async getNounVector(id: string): Promise<number[] | null> {
const noun = await this.getNoun(id)
return noun ? noun.vector : null
}
/**
* Save HNSW graph data for a noun
*
* v5.4.0: Uses BaseStorage's getNoun/saveNoun (type-first paths)
* CRITICAL: Uses mutex locking to prevent read-modify-write races
*/
public async saveHNSWData(nounId: string, hnswData: {
level: number
connections: Record<string, string[]>
}): Promise<void> {
const lockKey = `hnsw/${nounId}`
// CRITICAL FIX (v4.10.1): Mutex lock to prevent read-modify-write races
// Problem: Without mutex, concurrent operations can:
// 1. Thread A reads noun (connections: [1,2,3])
// 2. Thread B reads noun (connections: [1,2,3])
// 3. Thread A adds connection 4, writes [1,2,3,4]
// 4. Thread B adds connection 5, writes [1,2,3,5] ← Connection 4 LOST!
// Solution: Mutex serializes operations per entity (like FileSystem/OPFS adapters)
// Production scale: Prevents corruption at 1000+ concurrent operations
// Wait for any pending operations on this entity
while (this.hnswLocks.has(lockKey)) {
await this.hnswLocks.get(lockKey)
}
// Acquire lock
let releaseLock!: () => void
const lockPromise = new Promise<void>(resolve => { releaseLock = resolve })
this.hnswLocks.set(lockKey, lockPromise)
try {
// v5.4.0: Use BaseStorage's getNoun (type-first paths)
// Read existing noun data (if exists)
const existingNoun = await this.getNoun(nounId)
if (!existingNoun) {
// Noun doesn't exist - cannot update HNSW data for non-existent noun
throw new Error(`Cannot save HNSW data: noun ${nounId} not found`)
}
// Convert connections from Record to Map format for storage
const connectionsMap = new Map<number, Set<string>>()
for (const [level, nodeIds] of Object.entries(hnswData.connections)) {
connectionsMap.set(Number(level), new Set(nodeIds))
}
// Preserve id and vector, update only HNSW graph metadata
const updatedNoun: HNSWNoun = {
...existingNoun,
level: hnswData.level,
connections: connectionsMap
}
// v5.4.0: Use BaseStorage's saveNoun (type-first paths, atomic write via writeObjectToBranch)
await this.saveNoun(updatedNoun)
} finally {
// Release lock (ALWAYS runs, even if error thrown)
this.hnswLocks.delete(lockKey)
releaseLock()
}
}
/**
* Get HNSW graph data for a noun
* v5.4.0: Uses BaseStorage's getNoun (type-first paths)
*/
public async getHNSWData(nounId: string): Promise<{
level: number
connections: Record<string, string[]>
} | null> {
const noun = await this.getNoun(nounId)
if (!noun) {
return null
}
// Convert connections from Map to Record format
const connectionsRecord: Record<string, string[]> = {}
if (noun.connections) {
for (const [level, nodeIds] of noun.connections.entries()) {
connectionsRecord[String(level)] = Array.from(nodeIds)
}
}
return {
level: noun.level || 0,
connections: connectionsRecord
}
}
/**
* Save HNSW system data (entry point, max level)
*
* CRITICAL FIX (v4.10.1): Optimistic locking with ETags to prevent race conditions
*/
public async saveHNSWSystem(systemData: {
entryPointId: string | null
maxLevel: number
}): Promise<void> {
await this.ensureInitialized()
const key = `${this.systemPrefix}hnsw-system.json`
const blockBlobClient = this.containerClient!.getBlockBlobClient(key)
const maxRetries = 5
for (let attempt = 0; attempt < maxRetries; attempt++) {
try {
// Get current ETag
let currentETag: string | undefined
try {
const properties = await blockBlobClient.getProperties()
currentETag = properties.etag
} catch (error: any) {
// File doesn't exist yet
if (error.statusCode !== 404 && error.code !== 'BlobNotFound') {
throw error
}
}
const content = JSON.stringify(systemData, null, 2)
// ATOMIC WRITE: Use ETag precondition
await blockBlobClient.upload(content, content.length, {
blobHTTPHeaders: { blobContentType: 'application/json' },
conditions: currentETag
? { ifMatch: currentETag }
: { ifNoneMatch: '*' }
})
// Success!
return
} catch (error: any) {
// Precondition failed - concurrent modification
if (error.statusCode === 412 || error.code === 'ConditionNotMet') {
if (attempt === maxRetries - 1) {
this.logger.error(`Max retries (${maxRetries}) exceeded for HNSW system data`)
throw new Error('Failed to save HNSW system data: max retries exceeded due to concurrent modifications')
}
const backoffMs = 50 * Math.pow(2, attempt)
await new Promise(resolve => setTimeout(resolve, backoffMs))
continue
}
// Other error - rethrow
this.logger.error('Failed to save HNSW system data:', error)
throw new Error(`Failed to save HNSW system data: ${error}`)
}
}
}
/**
* Get HNSW system data (entry point, max level)
*/
public async getHNSWSystem(): Promise<{
entryPointId: string | null
maxLevel: number
} | null> {
await this.ensureInitialized()
try {
const key = `${this.systemPrefix}hnsw-system.json`
const blockBlobClient = this.containerClient!.getBlockBlobClient(key)
const downloadResponse = await blockBlobClient.download(0)
const downloaded = await this.streamToBuffer(downloadResponse.readableStreamBody!)
return JSON.parse(downloaded.toString())
} catch (error: any) {
if (error.statusCode === 404 || error.code === 'BlobNotFound') {
return null
}
this.logger.error('Failed to get HNSW system data:', error)
throw new Error(`Failed to get HNSW system data: ${error}`)
}
}
/**
* Set the access tier for a specific blob (v4.0.0 cost optimization)
* Azure Blob Storage tiers:
* - Hot: $0.0184/GB/month - Frequently accessed data
* - Cool: $0.01/GB/month - Infrequently accessed data (45% cheaper)
* - Archive: $0.00099/GB/month - Rarely accessed data (99% cheaper!)
*
* @param blobName - Name of the blob to change tier
* @param tier - Target access tier ('Hot', 'Cool', or 'Archive')
* @returns Promise that resolves when tier is set
*
* @example
* // Move old vectors to Archive tier (99% cost savings)
* await storage.setBlobTier('entities/nouns/vectors/ab/old-id.json', 'Archive')
*/
public async setBlobTier(
blobName: string,
tier: 'Hot' | 'Cool' | 'Archive'
): Promise<void> {
await this.ensureInitialized()
try {
this.logger.info(`Setting blob tier for ${blobName} to ${tier}`)
const blockBlobClient = this.containerClient!.getBlockBlobClient(blobName)
await blockBlobClient.setAccessTier(tier)
this.logger.info(`Successfully set ${blobName} to ${tier} tier`)
} catch (error: any) {
if (error.statusCode === 404 || error.code === 'BlobNotFound') {
throw new Error(`Blob not found: ${blobName}`)
}
this.logger.error(`Failed to set tier for ${blobName}:`, error)
throw new Error(`Failed to set blob tier: ${error}`)
}
}
/**
* Get the current access tier for a blob
*
* @param blobName - Name of the blob
* @returns Promise that resolves to the current tier or null if not found
*
* @example
* const tier = await storage.getBlobTier('entities/nouns/vectors/ab/id.json')
* console.log(`Current tier: ${tier}`) // 'Hot', 'Cool', or 'Archive'
*/
public async getBlobTier(blobName: string): Promise<string | null> {
await this.ensureInitialized()
try {
const blockBlobClient = this.containerClient!.getBlockBlobClient(blobName)
const properties = await blockBlobClient.getProperties()
return properties.accessTier || null
} catch (error: any) {
if (error.statusCode === 404 || error.code === 'BlobNotFound') {
return null
}
this.logger.error(`Failed to get tier for ${blobName}:`, error)
throw new Error(`Failed to get blob tier: ${error}`)
}
}
/**
* Set access tier for multiple blobs in batch (v4.0.0 cost optimization)
* Efficiently move large numbers of blobs between tiers for cost optimization
*
* @param blobs - Array of blob names and their target tiers
* @param options - Configuration options
* @returns Promise with statistics about tier changes
*
* @example
* // Move old data to Archive tier for 99% cost savings
* const oldBlobs = await storage.listObjectsUnderPath('entities/nouns/vectors/')
* await storage.setBlobTierBatch(
* oldBlobs.map(name => ({ blobName: name, tier: 'Archive' }))
* )
*/
public async setBlobTierBatch(
blobs: Array<{ blobName: string; tier: 'Hot' | 'Cool' | 'Archive' }>,
options: {
maxRetries?: number
retryDelayMs?: number
continueOnError?: boolean
} = {}
): Promise<{
totalRequested: number
successfulChanges: number
failedChanges: number
errors: Array<{ blobName: string; error: string }>
}> {
await this.ensureInitialized()
const {
maxRetries = 3,
retryDelayMs = 1000,
continueOnError = true
} = options
if (!blobs || blobs.length === 0) {
return {
totalRequested: 0,
successfulChanges: 0,
failedChanges: 0,
errors: []
}
}
this.logger.info(`Starting batch tier change for ${blobs.length} blobs`)
const stats = {
totalRequested: blobs.length,
successfulChanges: 0,
failedChanges: 0,
errors: [] as Array<{ blobName: string; error: string }>
}
// Process each blob (Azure doesn't have batch tier API, so we parallelize)
const CONCURRENT_LIMIT = 10 // Limit concurrent operations to avoid throttling
for (let i = 0; i < blobs.length; i += CONCURRENT_LIMIT) {
const batch = blobs.slice(i, i + CONCURRENT_LIMIT)
const promises = batch.map(async ({ blobName, tier }) => {
let retryCount = 0
while (retryCount <= maxRetries) {
try {
await this.setBlobTier(blobName, tier)
return { blobName, success: true, error: null }
} catch (error: any) {
// Handle throttling
if (this.isThrottlingError(error)) {
this.logger.warn(`Tier change throttled for ${blobName}, retrying...`)
await this.handleThrottling(error)
retryCount++
if (retryCount <= maxRetries) {
const delay = retryDelayMs * Math.pow(2, retryCount - 1)
await new Promise((resolve) => setTimeout(resolve, delay))
}
continue
}
// Other errors
if (retryCount < maxRetries) {
retryCount++
const delay = retryDelayMs * Math.pow(2, retryCount - 1)
await new Promise((resolve) => setTimeout(resolve, delay))
continue
}
// Max retries exceeded
return {
blobName,
success: false,
error: error.message || String(error)
}
}
}
// Should never reach here, but TypeScript needs a return
return {
blobName,
success: false,
error: 'Max retries exceeded'
}
})
const results = await Promise.all(promises)
for (const result of results) {
if (result.success) {
stats.successfulChanges++
} else {
stats.failedChanges++
if (result.error) {
stats.errors.push({
blobName: result.blobName,
error: result.error
})
}
}
}
}
this.logger.info(
`Batch tier change completed: ${stats.successfulChanges}/${stats.totalRequested} successful, ${stats.failedChanges} failed`
)
return stats
}
/**
* Check if a blob in Archive tier has been rehydrated and is ready to read
* Archive tier blobs must be rehydrated before they can be read
*
* @param blobName - Name of the blob to check
* @returns Promise that resolves to rehydration status
*
* @example
* const status = await storage.checkRehydrationStatus('entities/nouns/vectors/ab/id.json')
* if (status.isRehydrated) {
* // Blob is ready to read
* const data = await storage.readObjectFromPath('entities/nouns/vectors/ab/id.json')
* }
*/
public async checkRehydrationStatus(blobName: string): Promise<{
isArchived: boolean
isRehydrating: boolean
isRehydrated: boolean
rehydratePriority?: string
}> {
await this.ensureInitialized()
try {
const blockBlobClient = this.containerClient!.getBlockBlobClient(blobName)
const properties = await blockBlobClient.getProperties()
const tier = properties.accessTier
const archiveStatus = properties.archiveStatus
return {
isArchived: tier === 'Archive',
isRehydrating: archiveStatus === 'rehydrate-pending-to-hot' || archiveStatus === 'rehydrate-pending-to-cool',
isRehydrated: tier === 'Hot' || tier === 'Cool',
rehydratePriority: properties.rehydratePriority
}
} catch (error: any) {
if (error.statusCode === 404 || error.code === 'BlobNotFound') {
throw new Error(`Blob not found: ${blobName}`)
}
this.logger.error(`Failed to check rehydration status for ${blobName}:`, error)
throw new Error(`Failed to check rehydration status: ${error}`)
}
}
/**
* Rehydrate an archived blob (move from Archive to Hot or Cool tier)
* Note: Rehydration can take several hours depending on priority
*
* @param blobName - Name of the blob to rehydrate
* @param targetTier - Target tier after rehydration ('Hot' or 'Cool')
* @param priority - Rehydration priority ('Standard' or 'High')
* Standard: Up to 15 hours, cheaper
* High: Up to 1 hour, more expensive
* @returns Promise that resolves when rehydration is initiated
*
* @example
* // Rehydrate with standard priority (cheaper, slower)
* await storage.rehydrateBlob('entities/nouns/vectors/ab/id.json', 'Cool', 'Standard')
*
* // Check status
* const status = await storage.checkRehydrationStatus('entities/nouns/vectors/ab/id.json')
* console.log(`Rehydrating: ${status.isRehydrating}`)
*/
public async rehydrateBlob(
blobName: string,
targetTier: 'Hot' | 'Cool',
priority: 'Standard' | 'High' = 'Standard'
): Promise<void> {
await this.ensureInitialized()
try {
this.logger.info(`Rehydrating blob ${blobName} to ${targetTier} tier with ${priority} priority`)
const blockBlobClient = this.containerClient!.getBlockBlobClient(blobName)
// Set tier with rehydration priority
await blockBlobClient.setAccessTier(targetTier, {
rehydratePriority: priority
})
this.logger.info(`Successfully initiated rehydration for ${blobName}`)
} catch (error: any) {
if (error.statusCode === 404 || error.code === 'BlobNotFound') {
throw new Error(`Blob not found: ${blobName}`)
}
this.logger.error(`Failed to rehydrate blob ${blobName}:`, error)
throw new Error(`Failed to rehydrate blob: ${error}`)
}
}
/**
* Set lifecycle management policy for automatic tier transitions and deletions (v4.0.0)
* Automates cost optimization by moving old data to cheaper tiers or deleting it
*
* Azure Lifecycle Management rules run once per day and apply to the entire container.
* Rules are evaluated against blob properties like lastModifiedTime and lastAccessTime.
*
* @param options - Lifecycle policy configuration
* @returns Promise that resolves when policy is set
*
* @example
* // Auto-archive old vectors for 99% cost savings
* await storage.setLifecyclePolicy({
* rules: [
* {
* name: 'archiveOldVectors',
* enabled: true,
* type: 'Lifecycle',
* definition: {
* filters: {
* blobTypes: ['blockBlob'],
* prefixMatch: ['entities/nouns/vectors/']
* },
* actions: {
* baseBlob: {
* tierToCool: { daysAfterModificationGreaterThan: 30 },
* tierToArchive: { daysAfterModificationGreaterThan: 90 },
* delete: { daysAfterModificationGreaterThan: 365 }
* }
* }
* }
* }
* ]
* })
*/
public async setLifecyclePolicy(options: {
rules: Array<{
name: string
enabled: boolean
type: 'Lifecycle'
definition: {
filters: {
blobTypes: string[]
prefixMatch?: string[]
}
actions: {
baseBlob: {
tierToCool?: { daysAfterModificationGreaterThan: number }
tierToArchive?: { daysAfterModificationGreaterThan: number }
delete?: { daysAfterModificationGreaterThan: number }
}
}
}
}>
}): Promise<void> {
await this.ensureInitialized()
if (!this.accountName) {
throw new Error('Lifecycle policies require accountName to be configured')
}
try {
this.logger.info(`Setting lifecycle policy with ${options.rules.length} rules`)
const { BlobServiceClient } = await import('@azure/storage-blob')
// Get blob service client
let blobServiceClient: any
if (this.connectionString) {
blobServiceClient = BlobServiceClient.fromConnectionString(this.connectionString)
} else if (this.accountName && this.accountKey) {
const { StorageSharedKeyCredential } = await import('@azure/storage-blob')
const credential = new StorageSharedKeyCredential(this.accountName, this.accountKey)
blobServiceClient = new BlobServiceClient(
`https://${this.accountName}.blob.core.windows.net`,
credential
)
} else if (this.accountName && this.sasToken) {
blobServiceClient = new BlobServiceClient(
`https://${this.accountName}.blob.core.windows.net${this.sasToken}`
)
} else if (this.accountName) {
const { DefaultAzureCredential } = await import('@azure/identity')
const credential = new DefaultAzureCredential()
blobServiceClient = new BlobServiceClient(
`https://${this.accountName}.blob.core.windows.net`,
credential
)
} else {
throw new Error('Cannot set lifecycle policy without valid authentication')
}
// Get service properties to modify lifecycle policy
const serviceProperties = await blobServiceClient.getProperties()
// Format rules according to Azure's expected structure
const lifecyclePolicy = {
rules: options.rules.map(rule => ({
enabled: rule.enabled,
name: rule.name,
type: rule.type,
definition: {
filters: {
blobTypes: rule.definition.filters.blobTypes,
...(rule.definition.filters.prefixMatch && {
prefixMatch: rule.definition.filters.prefixMatch
})
},
actions: {
baseBlob: {
...(rule.definition.actions.baseBlob.tierToCool && {
tierToCool: rule.definition.actions.baseBlob.tierToCool
}),
...(rule.definition.actions.baseBlob.tierToArchive && {
tierToArchive: rule.definition.actions.baseBlob.tierToArchive
}),
...(rule.definition.actions.baseBlob.delete && {
delete: rule.definition.actions.baseBlob.delete
})
}
}
}
}))
}
// Set the lifecycle management policy
await blobServiceClient.setProperties({
...serviceProperties,
blobAnalyticsLogging: serviceProperties.blobAnalyticsLogging,
hourMetrics: serviceProperties.hourMetrics,
minuteMetrics: serviceProperties.minuteMetrics,
cors: serviceProperties.cors,
deleteRetentionPolicy: serviceProperties.deleteRetentionPolicy,
staticWebsite: serviceProperties.staticWebsite,
// Set lifecycle policy
lifecyclePolicy
})
this.logger.info(`Successfully set lifecycle policy with ${options.rules.length} rules`)
} catch (error: any) {
this.logger.error('Failed to set lifecycle policy:', error)
throw new Error(`Failed to set lifecycle policy: ${error.message || error}`)
}
}
/**
* Get the current lifecycle management policy
*
* @returns Promise that resolves to the current policy or null if not set
*
* @example
* const policy = await storage.getLifecyclePolicy()
* if (policy) {
* console.log(`Found ${policy.rules.length} lifecycle rules`)
* }
*/
public async getLifecyclePolicy(): Promise<{
rules: Array<{
name: string
enabled: boolean
type: string
definition: {
filters: {
blobTypes: string[]
prefixMatch?: string[]
}
actions: {
baseBlob: {
tierToCool?: { daysAfterModificationGreaterThan: number }
tierToArchive?: { daysAfterModificationGreaterThan: number }
delete?: { daysAfterModificationGreaterThan: number }
}
}
}
}>
} | null> {
await this.ensureInitialized()
if (!this.accountName) {
throw new Error('Lifecycle policies require accountName to be configured')
}
try {
this.logger.info('Getting lifecycle policy')
const { BlobServiceClient } = await import('@azure/storage-blob')
// Get blob service client
let blobServiceClient: any
if (this.connectionString) {
blobServiceClient = BlobServiceClient.fromConnectionString(this.connectionString)
} else if (this.accountName && this.accountKey) {
const { StorageSharedKeyCredential } = await import('@azure/storage-blob')
const credential = new StorageSharedKeyCredential(this.accountName, this.accountKey)
blobServiceClient = new BlobServiceClient(
`https://${this.accountName}.blob.core.windows.net`,
credential
)
} else if (this.accountName && this.sasToken) {
blobServiceClient = new BlobServiceClient(
`https://${this.accountName}.blob.core.windows.net${this.sasToken}`
)
} else if (this.accountName) {
const { DefaultAzureCredential } = await import('@azure/identity')
const credential = new DefaultAzureCredential()
blobServiceClient = new BlobServiceClient(
`https://${this.accountName}.blob.core.windows.net`,
credential
)
} else {
throw new Error('Cannot get lifecycle policy without valid authentication')
}
// Get service properties
const serviceProperties = await blobServiceClient.getProperties()
if (!serviceProperties.lifecyclePolicy || !serviceProperties.lifecyclePolicy.rules) {
this.logger.info('No lifecycle policy configured')
return null
}
this.logger.info(`Found lifecycle policy with ${serviceProperties.lifecyclePolicy.rules.length} rules`)
return serviceProperties.lifecyclePolicy
} catch (error: any) {
this.logger.error('Failed to get lifecycle policy:', error)
throw new Error(`Failed to get lifecycle policy: ${error.message || error}`)
}
}
/**
* Remove the lifecycle management policy
* All automatic tier transitions and deletions will stop
*
* @returns Promise that resolves when policy is removed
*
* @example
* await storage.removeLifecyclePolicy()
* console.log('Lifecycle policy removed - auto-archival disabled')
*/
public async removeLifecyclePolicy(): Promise<void> {
await this.ensureInitialized()
if (!this.accountName) {
throw new Error('Lifecycle policies require accountName to be configured')
}
try {
this.logger.info('Removing lifecycle policy')
const { BlobServiceClient } = await import('@azure/storage-blob')
// Get blob service client
let blobServiceClient: any
if (this.connectionString) {
blobServiceClient = BlobServiceClient.fromConnectionString(this.connectionString)
} else if (this.accountName && this.accountKey) {
const { StorageSharedKeyCredential } = await import('@azure/storage-blob')
const credential = new StorageSharedKeyCredential(this.accountName, this.accountKey)
blobServiceClient = new BlobServiceClient(
`https://${this.accountName}.blob.core.windows.net`,
credential
)
} else if (this.accountName && this.sasToken) {
blobServiceClient = new BlobServiceClient(
`https://${this.accountName}.blob.core.windows.net${this.sasToken}`
)
} else if (this.accountName) {
const { DefaultAzureCredential } = await import('@azure/identity')
const credential = new DefaultAzureCredential()
blobServiceClient = new BlobServiceClient(
`https://${this.accountName}.blob.core.windows.net`,
credential
)
} else {
throw new Error('Cannot remove lifecycle policy without valid authentication')
}
// Get service properties
const serviceProperties = await blobServiceClient.getProperties()
// Set properties without lifecycle policy (removes it)
await blobServiceClient.setProperties({
...serviceProperties,
blobAnalyticsLogging: serviceProperties.blobAnalyticsLogging,
hourMetrics: serviceProperties.hourMetrics,
minuteMetrics: serviceProperties.minuteMetrics,
cors: serviceProperties.cors,
deleteRetentionPolicy: serviceProperties.deleteRetentionPolicy,
staticWebsite: serviceProperties.staticWebsite,
// Remove lifecycle policy by not including it
lifecyclePolicy: undefined
})
this.logger.info('Successfully removed lifecycle policy')
} catch (error: any) {
this.logger.error('Failed to remove lifecycle policy:', error)
throw new Error(`Failed to remove lifecycle policy: ${error.message || error}`)
}
}
}