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

Posted to notifications@accumulo.apache.org by "Eric Newton (JIRA)" <ji...@apache.org> on 2014/11/06 22:04:34 UTC

[jira] [Commented] (ACCUMULO-97) !METADATA scans could be delayed by regular scans

    [ https://issues.apache.org/jira/browse/ACCUMULO-97?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14200920#comment-14200920 ] 

Eric Newton commented on ACCUMULO-97:
-------------------------------------

[~ctubbsii] the root table didn't make it any worse.

> !METADATA scans could be delayed by regular scans
> -------------------------------------------------
>
>                 Key: ACCUMULO-97
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-97
>             Project: Accumulo
>          Issue Type: Bug
>          Components: tserver
>            Reporter: Keith Turner
>
> The tablet server only allows scans to open a max number of files.  Once the max is reached, scans wait.  Its possible that a !METADATA scan could get stuck waiting for a long running non !METADATA scan to release files.  This could slow down the whole system.  !METADATA scans wold not starve because a fair semaphore is used.  However with client timeouts, starvation may be possible.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)