Ivan Andika created HDDS-11366:
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Summary: Replace WriteBatch with WriteBatchWithIndex
Key: HDDS-11366
URL: https://issues.apache.org/jira/browse/HDDS-11366
Project: Apache Ozone
Issue Type: New Feature
Components: OM
Reporter: Ivan Andika
See: [https://github.com/facebook/rocksdb/wiki/Write-Batch-With-Index]
Currently OM uses WriteBatch which only allows write on the batch. Therefore in
OM Response, we should not call DB#get directly since the latest write for a
particular key might be within the current batch that is yet to be flushed by
the OM double buffer.
We might want to replace WriteBatch with WriteBatchIndex which allows us to
read the latest writes from the write batch only (WriteBatchIndex#getFromBatch)
or also with the DB (WriteBatchIndex#getFromBatchAndDB).
Perhaps we can also remove the need of additional bookeeping in
RDBBatchOperation#opCache
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