hbase-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Nicolas Liochon (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-10018) Change the location prefetch
Date Fri, 22 Nov 2013 09:42:36 GMT
Nicolas Liochon created HBASE-10018:
---------------------------------------

             Summary: Change the location prefetch
                 Key: HBASE-10018
                 URL: https://issues.apache.org/jira/browse/HBASE-10018
             Project: HBase
          Issue Type: Bug
    Affects Versions: 0.96.0, 0.98.0
            Reporter: Nicolas Liochon
            Assignee: Nicolas Liochon
            Priority: Minor
             Fix For: 0.98.0, 0.96.1


Issues with prefetching are:
- we do two calls to meta: one for the exact row, one for the prefetch 
- it's done in a lock
- we take the next 10 regions. Why 10, why the 10 next?
- is it useful if the table has 100K regions?

Options are:
- just remove it
- replace it with a reverse scan: this would save a call

 



--
This message was sent by Atlassian JIRA
(v6.1#6144)

Mime
View raw message