69 lines
2.1 KiB
JavaScript
69 lines
2.1 KiB
JavaScript
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/**
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* Example demonstrating the write-only mode in BrainyData
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*
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* This mode is useful for data ingestion scenarios where you only need to insert data
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* and don't need to perform any search operations. It significantly reduces memory usage
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* by not loading the index into memory.
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*/
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import { BrainyData } from '../dist/index.js'
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// eslint-disable-next-line no-undef
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const console = globalThis.console
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async function demonstrateWriteOnlyMode() {
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console.log('Demonstrating write-only mode in BrainyData')
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// Create a BrainyData instance in write-only mode
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const db = new BrainyData({
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writeOnly: true,
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storage: {
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// Use file system storage for persistence
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forceFileSystemStorage: true
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}
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})
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// Initialize the database
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// This will skip loading the index into memory, saving memory and startup time
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await db.init()
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console.log('Database initialized in write-only mode')
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console.log('Is write-only:', db.isWriteOnly()) // Should print true
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// Add some data
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// This works normally even in write-only mode
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const id1 = await db.add('This is a test document', { title: 'Test Document 1' })
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const id2 = await db.add('Another test document with different content', { title: 'Test Document 2' })
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console.log(`Added documents with IDs: ${id1}, ${id2}`)
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// Try to search (this will throw an error in write-only mode)
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try {
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await db.search('test', 5)
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} catch (error) {
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console.log('Search error (expected):', error.message)
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}
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// Switch to normal mode to perform searches
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console.log('Switching to normal mode...')
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db.setWriteOnly(false)
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// Re-initialize to load the index
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await db.init()
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console.log('Database reinitialized in normal mode')
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console.log('Is write-only:', db.isWriteOnly()) // Should print false
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// Now search works
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const results = await db.search('test', 5)
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console.log('Search results:', results.map(r => ({ id: r.id, score: r.score, title: r.metadata?.title })))
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// Clean up
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await db.shutDown()
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}
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// Run the example
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demonstrateWriteOnlyMode().catch(error => {
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console.error('Error in write-only mode example:', error)
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})
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