[jira] Updated: (HBASE-2782) QOS for META table access

["ryan rawson (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-2782?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ryan rawson updated HBASE-2782:
-------------------------------

    Attachment: HBASE-2782.txt

> QOS for META table access
> -------------------------
>
>                 Key: HBASE-2782
>                 URL: https://issues.apache.org/jira/browse/HBASE-2782
>             Project: HBase
>          Issue Type: Improvement
>          Components: regionserver
>    Affects Versions: 0.89.20100621
>            Reporter: Todd Lipcon
>            Assignee: ryan rawson
>             Fix For: 0.90.0
>
>         Attachments: HBASE-2782.txt
>
>
> I'd like to brainstorm some ideas on how we can prioritize reads and writes to META above reads and writes to other tables. I've noticed that if the regionserver hosting META is under heavy load, then lots of other operations take much longer than they should. For example, I'm currently running 120 threads of YCSB across 3 client nodes hitting a 5-node cluster. Doing a full scan of META (only 600 rows) takes upwards of 30 seconds in the shell, since all of the handler threads are tied up and there's a long RPC queue. 

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