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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-5555) Allow sstableloader to handle a larger number of files
Date Sat, 25 May 2013 13:38:20 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-5555?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13667069#comment-13667069
] 

Jonathan Ellis commented on CASSANDRA-5555:
-------------------------------------------

Remember that memory use is primarily proportional to data size, not sstable count.

In any case, ISTM that it should be fairly easy to wrap sstableloader in a script that gives
it X GB of files at a time.
                
> Allow sstableloader to handle a larger number of files
> ------------------------------------------------------
>
>                 Key: CASSANDRA-5555
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5555
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Tools
>            Reporter: Tyler Hobbs
>            Assignee: Dave Brosius
>             Fix For: 1.2.6
>
>         Attachments: 5555-01.txt
>
>
> With the default heap size, sstableloader will OOM when there are roughly 25k files in
the directory to load.  It's easy to reach this number of files in a single LCS column family.
> By avoiding creating all SSTableReaders up front in SSTableLoader, we should be able
to increase the number of files that sstableloader can handle considerably.

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