Wei-Chiu Chuang created HDDS-8047:
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Summary: PutBlock request has lots of redundant metadata
Key: HDDS-8047
URL: https://issues.apache.org/jira/browse/HDDS-8047
Project: Apache Ozone
Issue Type: Bug
Reporter: Wei-Chiu Chuang
Attachments: hbase_rs.html
In a profile result, we found that the client PutBlock request has lots of
redundancy, especially the BlockData structure. The data structure contains the
metadata of every chunk in the block, which is not required because only the
last two chunks matters.
This is especially critical for small and frequent puts, such as hsync API
called by HBase WAL files. We found that at least 60% of client CPU cycle
during hsync call can be attributed to this problem, and potentially a huge
impact to the latency.
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