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From "Jerry He (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-15808) Reduce potential bulk load intermediate space usage and waste
Date Tue, 10 May 2016 20:15:13 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15808?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15278782#comment-15278782
] 

Jerry He commented on HBASE-15808:
----------------------------------

After HBASE-12375,  _tmp is not safe anymore.
Attached v2.

[~mbertozzi]: Would you mind taking a look? Thanks.

> Reduce potential bulk load intermediate space usage and waste
> -------------------------------------------------------------
>
>                 Key: HBASE-15808
>                 URL: https://issues.apache.org/jira/browse/HBASE-15808
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 1.2.0
>            Reporter: Jerry He
>            Assignee: Jerry He
>            Priority: Minor
>         Attachments: HBASE-15808.patch
>
>
> If the bulk load input files do not match the existing region boudaries, the files will
be splitted.
> In the unfornate cases where the files need to be splitted multiple times,
> the process can consume unnecessary space and can even cause out of space.
> Here is over-simplified example.
> Orinal size of input files:  
>   consumed space: size --> 300GB
> After a round of splits: 
>   consumed space: size + tmpspace1 --> 300GB + 300GB
> After another round of splits: 
>   consumded space:  size + tmpspace1 + tmpspace2 --> 300GB + 300GB + 300GB
> ..
> Currently we don't do any cleanup in the process. At least all the intermediate tmpspace
(not the last one) can be deleted in the process.



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