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https://issues.apache.org/jira/browse/HBASE-17161?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15709078#comment-15709078
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Hadoop QA commented on HBASE-17161:
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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 7s {color}
| {color:red} HBASE-17161 does not apply to master. Rebase required? Wrong
Branch? See https://yetus.apache.org/documentation/0.3.0/precommit-patchnames
for help. {color} |
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|| Subsystem || Report/Notes ||
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12841075/HBASE-17161.patch |
| JIRA Issue | HBASE-17161 |
| Console output |
https://builds.apache.org/job/PreCommit-HBASE-Build/4718/console |
| Powered by | Apache Yetus 0.3.0 http://yetus.apache.org |
This message was automatically generated.
> MOB : Make ref cell creation more efficient
> -------------------------------------------
>
> Key: HBASE-17161
> URL: https://issues.apache.org/jira/browse/HBASE-17161
> Project: HBase
> Issue Type: Improvement
> Reporter: Anoop Sam John
> Assignee: Anoop Sam John
> Fix For: 2.0.0
>
> Attachments: HBASE-17161.patch
>
>
> When we flush MOB data, ref cells are created per actual MOB cell. This
> creates lots of garbage
> Refer MobUtils#createMobRefCell
> We need to add 2 tags into the ref cell. An ArrayList is created with default
> size creating ref array. Call to CellUtil.getTags will create a new ArrayList
> even if the original cell is having no tags.
> A new KV is created which will create a new backing byte[] and do copy. Also
> along with each of the flush/compaction op, a fresh Tag object is created for
> TableName tag.
> Fixes include
> 1. A table name tag is not going to change per HStore. Even both the new
> tags to be added. Will keep a byte[] of these 2 tags at MobHStore level so
> that all flush and compactions in this store can use it.
> 2. Create a new MobRefCell just like TagRewriteCell where only value and tags
> part will be diff from the original cell.
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