Key-Value SSD的原理和应用.pdf

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Key/Value SSD

Design Overview and Use Cases Stanley Chief Engineer, Shannon Systems

Unstructured data dominates

Use Cases Pika CockroachDB MyRocks TiDB SSD KVSSD

The overhead cost of RocksDB Application RocksDB Filesystem Block Device SSD

The overhead of RocksDB Application RocksDB Filesystem Block Device 1. Read/Write must be aligned to 4KB sectors SSD

The overhead of RocksDB Application RocksDB 1, block bitmap Filesystem 2, map table: file address -> LBA . 3, the journal Block Device SSD

The overhead of RocksDB Application 1, High write amplication caused by compaction. RocksDB 2, Write Log 3, map key -> file address. Filesystem Block Device SSD

The overhead of RocksDB Application RocksDB key -> file address Filesystem file address -> LBA Block Device SSD LBA -> PBA

The ov

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