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https://issues.apache.org/jira/browse/HBASE-22749?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16951278#comment-16951278
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HBase QA commented on HBASE-22749:
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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 6s{color}
| {color:red} https://github.com/apache/hbase/pull/623 does not apply to
master. Rebase required? Wrong Branch? See
https://yetus.apache.org/documentation/in-progress/precommit-patchnames for
help. {color} |
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|| Subsystem || Report/Notes ||
| GITHUB PR | https://github.com/apache/hbase/pull/623 |
| JIRA Issue | HBASE-22749 |
| Console output |
https://builds.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-623/2/console |
| versions | git=2.17.1 |
| Powered by | Apache Yetus 0.11.0 https://yetus.apache.org |
This message was automatically generated.
> Distributed MOB compactions
> ----------------------------
>
> Key: HBASE-22749
> URL: https://issues.apache.org/jira/browse/HBASE-22749
> Project: HBase
> Issue Type: New Feature
> Components: mob
> Reporter: Vladimir Rodionov
> Assignee: Vladimir Rodionov
> Priority: Major
> Attachments: HBASE-22749-branch-2.2-v4.patch,
> HBASE-22749-master-v1.patch, HBASE-22749-master-v2.patch,
> HBase-MOB-2.0-v1.pdf, HBase-MOB-2.0-v2.1.pdf, HBase-MOB-2.0-v2.2.pdf,
> HBase-MOB-2.0-v2.pdf
>
>
> There are several drawbacks in the original MOB 1.0 (Moderate Object
> Storage) implementation, which can limit the adoption of the MOB feature:
> # MOB compactions are executed in a Master as a chore, which limits
> scalability because all I/O goes through a single HBase Master server.
> # Yarn/Mapreduce framework is required to run MOB compactions in a scalable
> way, but this won’t work in a stand-alone HBase cluster.
> # Two separate compactors for MOB and for regular store files and their
> interactions can result in a data loss (see HBASE-22075)
> The design goals for MOB 2.0 were to provide 100% MOB 1.0 - compatible
> implementation, which is free of the above drawbacks and can be used as a
> drop in replacement in existing MOB deployments. So, these are design goals
> of a MOB 2.0:
> # Make MOB compactions scalable without relying on Yarn/Mapreduce framework
> # Provide unified compactor for both MOB and regular store files
> # Make it more robust especially w.r.t. to data losses.
> # Simplify and reduce the overall MOB code.
> # Provide 100% compatible implementation with MOB 1.0.
> # No migration of data should be required between MOB 1.0 and MOB 2.0 - just
> software upgrade.
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