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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11339) HBase MOB
Date Thu, 04 Sep 2014 04:30:51 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11339?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14120943#comment-14120943
] 

Andrew Purtell commented on HBASE-11339:
----------------------------------------

{quote}
bq. The master's built in splitting was still available even if there was no MR runtime that
could run the replay tool.
If you were ok with 10 hr downtimes due to recovery (back then no meta first recovery), the
sure.  For large deployments that MR for this was critical and not really optional.
{quote}
It was possible if (perhaps deeply) suboptimal. We should expect the same with MOB compaction,
perhaps the first cut it's better to use the MR tool, but we should not mandate the presence
of the MR runtime for core HBase function.

> HBase MOB
> ---------
>
>                 Key: HBASE-11339
>                 URL: https://issues.apache.org/jira/browse/HBASE-11339
>             Project: HBase
>          Issue Type: Umbrella
>          Components: regionserver, Scanners
>            Reporter: Jingcheng Du
>            Assignee: Jingcheng Du
>         Attachments: HBase MOB Design-v2.pdf, HBase MOB Design-v3.pdf, HBase MOB Design-v4.pdf,
HBase MOB Design.pdf, MOB user guide.docx, MOB user guide_v2.docx, MOB user guide_v3.docx,
hbase-11339-in-dev.patch
>
>
>   It's quite useful to save the medium binary data like images, documents into Apache
HBase. Unfortunately directly saving the binary MOB(medium object) to HBase leads to a worse
performance since the frequent split and compaction.
>   In this design, the MOB data are stored in an more efficient way, which keeps a high
write/read performance and guarantees the data consistency in Apache HBase.



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