cassandra-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Johan Oskarsson (JIRA)" <j...@apache.org>
Subject [jira] Updated: (CASSANDRA-1050) Too many splits for ColumnFamily with only a few rows
Date Fri, 21 May 2010 14:16:18 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-1050?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Johan Oskarsson updated CASSANDRA-1050:
---------------------------------------

    Attachment: CASSANDRA-1050.patch

This patch for trunk should help with the problem. Run ant gen-thrift-java as the generated
code is not in the patch.
I ran the word count test and that worked, have not had time to try it in the scenario described
in the ticket though.

> Too many splits for ColumnFamily with only a few rows
> -----------------------------------------------------
>
>                 Key: CASSANDRA-1050
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1050
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Hadoop
>    Affects Versions: 0.6
>            Reporter: Joost Ouwerkerk
>             Fix For: 0.6.2
>
>         Attachments: CASSANDRA-1050.patch
>
>
> ColumnFamilyInputFormat creates splits for the entire Keyspace.  If one ColumnFamily
has 100 Million rows and another has only 100 rows, the number of splits will be the 1,526
(assuming 64k rows per split) for either one, since it is based on the total number of unique
keys across the whole keyspace, and not on the number of rows in the ColumnFamily.

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


Mime
View raw message