Semyon Danilov created IGNITE-16803:
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Summary: RocksDB usage refinement
Key: IGNITE-16803
URL: https://issues.apache.org/jira/browse/IGNITE-16803
Project: Ignite
Issue Type: Improvement
Reporter: Semyon Danilov
Ignite 3 uses RocksDB in many different components: metastorage, partition
storage, log storage and vault. At this moment, every component creates its own
instance of rocksdb. Moreover, partition storage and log storage create
multiple instances: partition storage creates an instance per table and log
storage creates an instance per raft group.
This creates high memory overhead and causes out of memory errors. We have to
find a way to use as few instances as possible (ideally one per ignite node).
For example, MySQL over RocksDB uses only one instance of RocksDB but "create
table" query offers a way to put data into another column family. Maybe we can
store all raft logs in one column family and data (partitions and meta) in
another.
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