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From "Vijay (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-4165) Generate Digest file for compressed SSTables
Date Fri, 20 Sep 2013 22:34:58 GMT


Vijay commented on CASSANDRA-4165:

Hi Jonathan, 3648 actually adds block level CRC for uncompressed files and writes to a separate
file (CRC.db), and uses it during the streaming parts of the file to validate before streaming
(not during normal reads). Hence we need 2 Checksums during the flush 1 for blocks and the
md5 for the whole file.
> Generate Digest file for compressed SSTables
> --------------------------------------------
>                 Key: CASSANDRA-4165
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Marcus Eriksson
>            Assignee: Marcus Eriksson
>            Priority: Minor
>         Attachments: 0001-Generate-digest-for-compressed-files-as-well.patch, 4165-rebased.txt
> We use the generated *Digest.sha1-files to verify backups, would be nice if they were
generated for compressed sstables as well.

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