I think the abandoned sstables resulting from dropping a CF are handled the same as SSTables left over after compaction. They are deleted as part of a full GC.

See the section on Compaction here http://wiki.apache.org/cassandra/MemtableSSTable

You can trigger GC via JConsole. 

Hope that helps 
Aaron


On 21 Jan, 2011,at 01:42 PM, buddhasystem <potek...@bnl.gov> wrote:


Greetings,

I just used teh nodetool to force a major compaction on my cluster. It seems
like the cfs currently in service were indeed compacted, while the old test
materials (which I dropped from CLI) were still there as tombstones.

Is that the expected behavior? Hmm...

TIA.

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