hbase-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Riley Patterson (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-4358) Batch Table Alter Operations
Date Fri, 09 Sep 2011 00:10:08 GMT
Batch Table Alter Operations
----------------------------

                 Key: HBASE-4358
                 URL: https://issues.apache.org/jira/browse/HBASE-4358
             Project: HBase
          Issue Type: Improvement
          Components: ipc, master, shell
    Affects Versions: 0.92.0
            Reporter: Riley Patterson
            Assignee: Riley Patterson
            Priority: Minor


Currently, the RPC provides no way of asking for several table alterations at once, and the
master has no way of batch handling alter requests. Thus, when the user requests several changes
at the same time (i.e. add these I columns, delete these J columns, and modify these K columns),
each region is brought down (I+J+K) times so that it can reflect the new schema. Additionally,
multiple writes are made to META, and multiple RPC calls must be made.

This patch provides batching for these operations, both at the RPC level and within the Master's
TableEventHandlers. This involves a bit of reorganization in the TableEventHandler class hierarchy,
and a new TableEventHandler, TableMultiFamilyHandler. The net effect ends up being the difference
seen here:

Before patch:
hbase(main):001:0> alter 'peeps', {NAME => 'rawr'}, {METHOD => 'delete', NAME =>
'name'}
Updating all regions with the new schema...
1/1 regions updated.
Done.
Updating all regions with the new schema...
1/1 regions updated.
Done.
0 row(s) in 2.6450 seconds

After patch:
hbase(main):002:0> alter 'peeps', {NAME => 'rawr'}, {METHOD => 'delete', NAME =>
'name'}
Updating all regions with the new schema...
1/1 regions updated.
Done.
0 row(s) in 1.1930 seconds

Regions are only brought down once, and the duration is cut 1/N.

--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira

        

Mime
View raw message