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From Peter Schuller <>
Subject Re: Cassandra disk space utilization WAY higher than I would expect
Date Wed, 07 Jul 2010 17:17:17 GMT
> I am thinking that the timestamps and column names should be included in the
> column family stats, which basically says 300,000 rows that are 100KB each=30
> GB.  My rows only have 1 column so there should only be one timestamp.  My
> column name is only 10 bytes long.
> This doesn't explain why 30 GB of data is taking up 106 GB of disk 24 hours
> after all writes have completed.  Compactions should be complete, no?

Nope, it sounds fishy to me. Presuming that compaction is not actively
running in the background still (should be obvious from logs and/or
CPU usage and/or disk I/O).

/ Peter Schuller

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