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https://issues.apache.org/jira/browse/HBASE-2219?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12833728#action_12833728
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ryan rawson commented on HBASE-2219:
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ok, doing multiple runs shows quite a bit less variance, and in some cases with
this patch is faster (?).
2219:
10/02/15 01:12:34 INFO hbase.PerformanceEvaluation: Finished randomRead in
23423ms at offset 0 for 100000 rows
10/02/15 01:13:20 INFO hbase.PerformanceEvaluation: Finished randomRead in
22861ms at offset 0 for 100000 rows
10/02/15 01:14:58 INFO hbase.PerformanceEvaluation: Finished randomRead in
22838ms at offset 0 for 100000 rows
10/02/15 01:15:39 INFO hbase.PerformanceEvaluation: Finished randomRead in
22851ms at offset 0 for 100000 rows
without:
10/02/15 01:19:27 INFO hbase.PerformanceEvaluation: Finished randomRead in
25250ms at offset 0 for 100000 rows
10/02/15 01:20:03 INFO hbase.PerformanceEvaluation: Finished randomRead in
23326ms at offset 0 for 100000 rows
10/02/15 01:20:35 INFO hbase.PerformanceEvaluation: Finished randomRead in
23010ms at offset 0 for 100000 rows
10/02/15 01:21:08 INFO hbase.PerformanceEvaluation: Finished randomRead in
23007ms at offset 0 for 100000 rows
> stop using code mapping for method names in the RPC
> ---------------------------------------------------
>
> Key: HBASE-2219
> URL: https://issues.apache.org/jira/browse/HBASE-2219
> Project: Hadoop HBase
> Issue Type: Bug
> Components: ipc
> Affects Versions: 0.20.3
> Reporter: ryan rawson
> Priority: Blocker
> Fix For: 0.21.0
>
> Attachments: HBASE-2219-2.patch, HBASE-2219.patch
>
>
> since we use a sorted mapping of method names -> codes and send that over the
> wire, even trivial changes, such as adding a new call, become
> wire-incompatible. This means many features which could easily have gone
> into a minor update must wait for a major update. Eg: 2066, 1845, etc.
> This will increase on-wire overhead, but the compatibility is worth it I
> think.
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