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https://issues.apache.org/jira/browse/CASSANDRA-47?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13062731#comment-13062731
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Pavel Yaskevich commented on CASSANDRA-47:
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bq. Is this for where we have to seek back to write the row size on large rows?

Exactly.

bq. We're already making two passes when compacting large rows (first to 
compute the indexes), we could make the first pass compute the serialized size 
so we don't have to seek after the 2nd pass that writes the data.

I will look into it.

> SSTable compression
> -------------------
>
>                 Key: CASSANDRA-47
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-47
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Core
>            Reporter: Jonathan Ellis
>            Assignee: Pavel Yaskevich
>              Labels: compression
>             Fix For: 1.0
>
>         Attachments: CASSANDRA-47.patch, snappy-java-1.0.3-rc4.jar
>
>
> We should be able to do SSTable compression which would trade CPU for I/O 
> (almost always a good trade).

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