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From "Jonathan Hsieh (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11339) HBase MOB
Date Tue, 19 May 2015 23:39:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11339?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14551473#comment-14551473
] 

Jonathan Hsieh commented on HBASE-11339:
----------------------------------------

the merge into hbase-11339 branch  would have the following commit message:

{code}
Merge remote-tracking branch 'apache/master' (5/19/15) into hbase-11339

Patches that caused deltas:
HBASE-10810 - around HColumnDescriptor 'should' vs 'is' api.
HBASE-11677 - LOG was made private
HBASE-11927 - Checksum constant changed
HBASE-10800 - CellComparator instead of KVComparator

Conflicts:
	hbase-server/src/main/java/org/apache/hadoop/hbase/master/handler/DeleteTableHandler.java
	hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/DefaultStoreEngine.java
	hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/compactions/DefaultCompactor.java
	hbase-server/src/test/java/org/apache/hadoop/hbase/util/LoadTestTool.java
{code}

> HBase MOB
> ---------
>
>                 Key: HBASE-11339
>                 URL: https://issues.apache.org/jira/browse/HBASE-11339
>             Project: HBase
>          Issue Type: Umbrella
>          Components: regionserver, Scanners
>    Affects Versions: 2.0.0
>            Reporter: Jingcheng Du
>            Assignee: Jingcheng Du
>             Fix For: hbase-11339
>
>         Attachments: HBase MOB Design-v2.pdf, HBase MOB Design-v3.pdf, HBase MOB Design-v4.pdf,
HBase MOB Design-v5.pdf, HBase MOB Design.pdf, MOB user guide.docx, MOB user guide_v2.docx,
MOB user guide_v3.docx, MOB user guide_v4.docx, MOB user guide_v5.docx, hbase-11339-150519.patch,
hbase-11339-in-dev.patch, hbase-11339.150417.patch, merge-150212.patch, merge.150212b.patch,
merge.150212c.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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