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https://issues.apache.org/jira/browse/HBASE-15885?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16156727#comment-16156727
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Hadoop QA commented on HBASE-15885:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m
0s{color} | {color:blue} Docker mode activated. {color} |
| {color:red}-1{color} | {color:red} patch {color} | {color:red} 0m 4s{color}
| {color:red} HBASE-15885 does not apply to master. Rebase required? Wrong
Branch? See https://yetus.apache.org/documentation/0.4.0/precommit-patchnames
for help. {color} |
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|| Subsystem || Report/Notes ||
| JIRA Issue | HBASE-15885 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12806045/HBASE-15885.patch |
| Console output |
https://builds.apache.org/job/PreCommit-HBASE-Build/8492/console |
| Powered by | Apache Yetus 0.4.0 http://yetus.apache.org |
This message was automatically generated.
> Compute StoreFile HDFS Blocks Distribution when needed
> ------------------------------------------------------
>
> Key: HBASE-15885
> URL: https://issues.apache.org/jira/browse/HBASE-15885
> Project: HBase
> Issue Type: Improvement
> Components: HFile
> Affects Versions: 2.0.0
> Reporter: Guanghao Zhang
> Assignee: Guanghao Zhang
> Attachments: HBASE-15885.patch
>
>
> Now when open a StoreFileReader, it always need to compute HDFS blocks
> distribution. But when balance a region, it will increase the region not
> serving time. Because it need first close region on rs A, then open it on rs
> B. When close region, it first preFlush, then flush the new update to a new
> store file. The new store file will first be flushed to tmp directory, then
> move it to column family directory. These need open StoreFileReader twice
> which means it need compute HDFS blocks distribution twice. When open region
> on rs B, it need open StoreFileReader and compute HDFS blocks distribution
> too. So when balance a region, it need compute HDFS blocks distribution three
> times for per new store file. This will increase the region not serving time
> and we don't need compute HDFS blocks distribution when close a region.
> The related three methods in HStore.
> 1. validateStoreFile(...)
> 2. commitFile(...)
> 3. openStoreFiles(...)
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