hbase-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] Issue Comment Edited: (HBASE-902) Add force major compaction and force split to UI
Date Sat, 11 Oct 2008 18:55:44 GMT

    [ https://issues.apache.org/jira/browse/HBASE-902?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12638783#action_12638783
] 

apurtell edited comment on HBASE-902 at 10/11/08 11:55 AM:
-----------------------------------------------------------------

The idea is to have a menu of table actions at the bottom of table.jsp output, separated by
a horizontal rule from the region listing. The forms post back via GET to table.jsp which
performs the appropriate action as indicated by query parameters. This also allows table actions
to be easily automated.  

See attached 'ui.1.png' which incorporates suggestions by jdcryans and stack. 

If a key is not given that locates a specific region, all regions are split or compacted or
whatever action is under consideration. The key does not need to be a midkey, only >= the
start key for the particular region. (This is why getMetaRegionForKeyClosest().)  

      was (Author: apurtell):
    The idea is to have a menu of table actions at the bottom of table.jsp output, separated
by a horizontal rule from the region listing. The forms post back via GET to table.jsp which
performs the appropriate action as indicated by query parameters. This also allows table actions
to be easily automated.  

See attached 'ui.1.png' which incorporates suggestions by jdcryans and stack. 

If a key is not given that locates a specific region, all regions are split or compacted or
whatever action is under consideration. The key does not need to be a midkey, only <= the
start key for the particular region. (This is why getMetaRegionForKeyClosest().)  
  
> Add force major compaction and force split to UI
> ------------------------------------------------
>
>                 Key: HBASE-902
>                 URL: https://issues.apache.org/jira/browse/HBASE-902
>             Project: Hadoop HBase
>          Issue Type: Improvement
>            Reporter: stack
>            Assignee: Andrew Purtell
>         Attachments: 902-1.patch, split.png, ui.1.png
>
>
> Would help debugging or at start of big upload or if we have a hot region we want to
distribute over the cluster if we could just manually force the splitting of regions.
> I thought it would be just a little messing in jsp but its a bit more than that.
> Actual decision to split is made down in guts of the Store.  Won't split if any references
still around and a file must be > maxsize.
> Chatting w/ Jon Gray, could set a flag on the region that we want to split.  Could do
this from UI (Can get to HRegion instance from HRS instance in HRS jsp).  Stores have references
to their hosting regions (I think).  When figuring if we're to split, check the force split
flag up in the hosting region.
> To get the flag checked, safest way is to just force a flush (Otherwise, have to mess
w/ locks in the compact/splitter thread).  Registering a flush request on a region is easy
enough to do.  Its a public method on HRS (or HR).

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message