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Documentation updates: - Fix v0.1.0 → v1.1.0 version numbers in en, ru, fa, zh docs - Add missing Window Functions, Multi-Tenant ERP, Supported Keywords sections to ru, fa, zh baraql.md (~105 lines each) - Expand Turkish and Arabic baraql.md (110 → 268 lines) - Expand Turkish and Arabic installation.md (62 → 307 lines) - Add new Bulgarian documentation files (18 new files) Client updates: - Python: Full async/await rewrite with asyncio, request queueing - Rust: Full async/await rewrite with tokio, async examples - Nim: Update README to v1.1.0 - All clients now support async patterns consistently
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2.0 KiB
Storage Engines
BaraDB предоставя множество storage двигатели, оптимизирани за различни модели на достъп.
LSM-Tree (Key-Value)
Основният storage engine с write-оптимизирана append-only лог структура.
Употреба
import barabadb/storage/lsm
var db = newLSMTree("./data")
db.put("key1", cast[seq[byte]]("value1"))
let (found, value) = db.get("key1")
db.close()
Компоненти
- MemTable: В-памет сортиран буфер
- WAL: Write-ahead log за устойчивост
- SSTable: Сортирани string таблици на диска
- Bloom Filter: Вероятностна проверка за принадлежност
- Compaction: Size-tiered стратегия с управление на нива
- Page Cache: LRU кеш с проследяване на hit rate
B-Tree Индекс
Подреден индекс за range сканиране и точково търсене.
Употреба
import barabadb/storage/btree
var btree = newBTreeIndex[string, string]()
btree.insert("key1", "value1")
let values = btree.get("key1")
let range = btree.scan("key_a", "key_z")
Write-Ahead Log (WAL)
Осигурява устойчивост на операциите за запис.
import barabadb/storage/wal
var wal = newWAL("./wal")
wal.append("txn1", "SET key1 value1")
wal.flush()
Bloom Filter
Вероятностна структура от данни за бързи негативни проверки.
import barabadb/storage/bloom
var filter = newBloomFilter(10000, 0.01)
filter.add("key1")
if filter.mightContain("key1"):
echo "евентуално съществува"
Memory-mapped I/O
Ефективен достъп до файлове чрез mmap.
import barabadb/storage/mmap
var mapped = mmapFile("./data/file.dat")
let data = mapped.read(0, 100)