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From Roshan <>
Subject Cassandra backup question regarding commitlogs
Date Sun, 29 Apr 2012 22:29:03 GMT

Currently I am taking daily snapshot on my keyspace in production and
already enable the incremental backups as well.

According to the documentation, the incremental backup option will create an
hard-link to the backup folder when new sstable is flushed. Snapshot will
copy all the data/index/etc. files to a new folder.

What will happen (with enabling the incremental backup) when crash (due to
any reason) the Cassandra before flushing the data as a SSTable (inserted
data still in commitlog). In this case how can I backup/restore data?

Do I need to backup the commitlogs as well and and replay during the server
start to restore the data in commitlog files?


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