Duong created RATIS-2130:
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Summary: Make RocksDB cache configurable in Ozone Manager
Key: RATIS-2130
URL: https://issues.apache.org/jira/browse/RATIS-2130
Project: Ratis
Issue Type: Improvement
Reporter: Duong
Ozone Manager's performance heavily depends on RocksDB performance. RocksDB
cache plays an important role in RocksDB's read performance, especially when a
client has to host OM's metadata in not-so-fast hardware.
Today, OM RocksDB cache is fixed at 256MB (see DBProfile), this is unreasonable
because the cache size should depend on the client use-case, i.e. how big is
their active key space. For example, if a client always has 1M of hot keys
daily, and each key metadata is 1kb, having a cache size of 1GB makes a lot of
sense.
Ref:
* [https://github.com/facebook/rocksdb/wiki/Block-Cache]
* [https://github.com/facebook/rocksdb/wiki/Performance-Benchmarks]
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