mpackdb

1.0 KB

1. import MPackDB from '../src/MPackDB.js';
2. import { rm } from 'fs/promises';
4. await rm('test-compact-isolated', { recursive: true, force: true });
6. const db = new MPackDB('test-compact-isolated/records', {
7. primaryKey: '*id',
8. indexes: ['*id', 'email', '*score'],
9. indexPersistThreshold: 100000,
10. indexPersistInterval: 0
11. });
13. console.log('Insert 10,000 records...');
14. for (let i = 0; i < 10_000; i++) {
15. await db.insert({
16. email: `user${i}@example.com`,
17. name: `User ${i}`,
18. score: Math.floor(Math.random() * 100),
19. data: `Data ${i}`
20. });
21. }
23. console.log('Randomly select 500 IDs to delete...');
24. const idsToDelete = new Set();
25. while (idsToDelete.size < 500) {
26. idsToDelete.add(Math.floor(Math.random() * 10_000));
27. }
29. console.log('Delete...');
30. const deletedRecords = await db.delete(r => idsToDelete.has(r.id));
31. console.log(`Deleted: ${deletedRecords.length}`);
33. console.log('Count records...');
34. let count = 0;
35. for await (const rec of db.find()) count++;
36. console.log(`Found: ${count} (expected ${10000 - deletedRecords.length})`);
38. await db.close();
39. await rm('test-compact-isolated', { recursive: true, force: true });