hbase-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "takeshi.miao (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-10003) OnlineMerge should be extended to allow bulk merging
Date Sun, 18 May 2014 16:21:44 GMT

    [ https://issues.apache.org/jira/browse/HBASE-10003?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14001117#comment-14001117

takeshi.miao commented on HBASE-10003:

Hi [~esteban]
Tks for your follow-up, actually I have not much progress about this ticket, and plan to finish
it in following two month with my available time. But I afraid this may impact community release
plan or something. If it is, I think maybe some one can take care of this ticket...Sorry for
this bad news, due to I have my schedule totally full recently for dealing with company's
Tks for your understanding.

> OnlineMerge should be extended to allow bulk merging
> ----------------------------------------------------
>                 Key: HBASE-10003
>                 URL: https://issues.apache.org/jira/browse/HBASE-10003
>             Project: HBase
>          Issue Type: Improvement
>          Components: Admin, Usability
>    Affects Versions: 0.98.0, 0.94.6
>            Reporter: Clint Heath
>            Assignee: takeshi.miao
>            Priority: Critical
>              Labels: noob
> Now that we have Online Merge capabilities, the function of that tool should be extended
to make it much easier for HBase operations folks to use.  Currently it is a very manual process
(one fraught with confusion) to hand pick two regions that are contiguous to each other in
the META table such that the admin can manually request those two regions to be merged.
> In the real world, when admins find themselves wanting to merge regions, it's usually
because they've greatly increased their hbase.hregion.max.filesize property and they have
way too many regions on a table and want to reduce the region count for that entire table
quickly and easily.
> Why can't the OnlineMerge command just take a "-max" argument along with a table name
which tells it to go ahead and merge all regions of said table until the resulting regions
are all of max size?  This takes the voodoo out of the process and quickly gets the admin
what they're looking for.
> As part of this improvement, I also suggest a "-regioncount" argument for OnlineMerge,
which will attempt to reduce the table's region count down to the specified #.

This message was sent by Atlassian JIRA

View raw message