nkeywal created HBASE-5924:
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Summary: In the client code, don't wait for all the requests to be
executed before resubmitting a request in error.
Key: HBASE-5924
URL: https://issues.apache.org/jira/browse/HBASE-5924
Project: HBase
Issue Type: Improvement
Components: client
Affects Versions: 0.96.0
Reporter: nkeywal
Assignee: nkeywal
Priority: Minor
The client (in the function HConnectionManager#processBatchCallback) works in
two steps:
- make the requests
- collect the failures and successes and prepare for retry
It means that when there is an immediate error (region moved, split, dead
server, ...) we still wait for all the initial requests to be executed before
submitting again the failed request. If we have a scenario with all the
requests taking 5 seconds we have a final execution time of: 5 (initial
requests) + 1 (wait time) + 5 (final request) = 11s.
We could improve this by analyzing immediately the results. This would lead us,
for the scenario mentioned above, to 6 seconds.
So we could have a performance improvement of nearly 50% in many cases, and
much more than 50% if the request execution time is different.
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