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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: Disk usage doubled after nodetool compact
Date Wed, 19 May 2010 06:24:17 GMT
Sounds like this:

"SSTables that are obsoleted by a compaction are deleted
asynchronously when the JVM performs a GC. You can force a GC from
jconsole if necessary, but Cassandra will force one itself if it
detects that it is low on space. A compaction marker is also added to
obsolete sstables so they can be deleted on startup if the server does
not perform a GC before being restarted. "

http://wiki.apache.org/cassandra/MemtableSSTable

On Mon, May 17, 2010 at 10:40 PM, Arie Keren <arie@doubleverify.com> wrote:
> After performing "nodetool compact" command the disk usage was doubled.
>
> nodetool info reports that the load is 74G (same as before compaction) while
> the size of the data folder on disk is 133GB (was about 74G before
> compaction).
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-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of Riptano, the source for professional Cassandra support
http://riptano.com

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