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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-867) If millions of columns in a column family, hbase scanner won't come up
Date Thu, 04 Sep 2008 00:11:44 GMT

    [ https://issues.apache.org/jira/browse/HBASE-867?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12628210#action_12628210
] 

stack commented on HBASE-867:
-----------------------------

It looks like we should be breaking out of the main while loop in the next method after we
pass out a column match -- because store keys are sorted -- but then we fall on the next while
loop which just nexts until we hit the next row.

Normally this is fine, if only a few columns in a row, but in Daniel's case its taking forever
to move to the next row.

Also, we won't split a region if only one row so its looking like his store files are large,
1G.

> If millions of columns in a column family, hbase scanner won't come up
> ----------------------------------------------------------------------
>
>                 Key: HBASE-867
>                 URL: https://issues.apache.org/jira/browse/HBASE-867
>             Project: Hadoop HBase
>          Issue Type: Bug
>            Reporter: stack
>
> Our Daniel has uploaded a table that has a column family with millions of columns in
it.  He can get items from the table promptly specifying row and column.  Scanning is another
matter.  Thread dumping I see we're stuck in the scanner constructor nexting through cells.

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