You are viewing a plain text version of this content. The canonical link for it is here.

Posted to issues@hbase.apache.org by "Hairong Kuang (JIRA)" <ji...@apache.org> on 2011/01/07 23:41:45 UTC

[jira] Commented: (HBASE-3285) Hlog recovery takes too much time

    [ https://issues.apache.org/jira/browse/HBASE-3285?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12979000#action_12979000 ] 

Hairong Kuang commented on HBASE-3285:
--------------------------------------

HDFS-1554 provides a new semantics which will speed up lease recovery. (No need to wait for soft lease expiration).

> Hlog recovery takes too much time
> ---------------------------------
>
>                 Key: HBASE-3285
>                 URL: https://issues.apache.org/jira/browse/HBASE-3285
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Hairong Kuang
>            Assignee: Hairong Kuang
>
> Currently HBase uses append to trigger the close of HLog during Hlog split. Append is a very expensive operation, which involves not only NameNode operations but creating a writing pipeline. If one of datanodes on the pipeline has a problem, this recovery may takes minutes. I'd like implement a lightweight NameNode operation to trigger lease recovery and make HBase to use this instead.

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