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From "Daniel Chia (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-9265) Add checksum to saved cache files
Date Mon, 27 Jul 2015 17:00:06 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-9265?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14643023#comment-14643023
] 

Daniel Chia commented on CASSANDRA-9265:
----------------------------------------

[~aweisberg] I can understand that, putting it in 2.2 would probably mean we get it earlier
than 3.x which would be better.

If it happens a lot more while we're still on 2.1, I can always re-open a ticket again then.

> Add checksum to saved cache files
> ---------------------------------
>
>                 Key: CASSANDRA-9265
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9265
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Ariel Weisberg
>             Fix For: 3.x
>
>
> Saved caches are not covered by a checksum. We should at least emit a checksum. My suggestion
is a large checksum of the whole file (convenient offline validation), and then smaller per
record checksums after each record is written (possibly a subset of the incrementally maintained
larger checksum).
> I wouldn't go for anything fancy to try to recover from corruption since it is just a
saved cache. If corruption is detected while reading I would just have it bail out. I would
rather have less code to review and test in this instance.



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