Persistence and Durability

💾 Persistence & Durability

VortexKV offers dual persistence combining point-in-time binary RDB snapshots with Append-Only File (AOF) durability.

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1. Append-Only File (AOF)

Logs every mutating command (SET, HSET, XADD, etc.) to disk:

• fsync always: Maximum durability; syncs after every write.
• fsync everysec: Recommended default; syncs once per second with < 1% throughput impact.
• fsync no: Delegates sync timing to the operating system kernel.

Launch with AOF:

./bin/vortex-server -aof vortex.aof -aof-fsync everysec

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2. Binary RDB Snapshots

Point-in-time compact snapshots in standard REDIS0009 format with 64-bit CRC64 checksum verification:

• SAVE: Synchronous blocking snapshot.
• BGSAVE: Asynchronous non-blocking background snapshot.
• LASTSAVE: Returns UNIX timestamp of the last successful disk snapshot.

Launch with RDB:

./bin/vortex-server -rdb dump.rdb