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From Jonathan Ellis <>
Subject Re: Cassandra reverting deletes?
Date Tue, 27 Apr 2010 01:45:02 GMT
How are you checking that the rows are gone?

Are you experiencing node outages during this?

DC_QUORUM is unfinished code right now, you should avoid using it.
Can you reproduce with normal QUORUM?

On Sat, Apr 24, 2010 at 12:23 PM, Joost Ouwerkerk <> wrote:
> I'm having trouble deleting rows in Cassandra.  After running a job that
> deletes hundreds of rows, I run another job that verifies that the rows are
> gone.  Both jobs run correctly.  However, when I run the verification job an
> hour later, the rows have re-appeared.  This is not a case of "ghosting"
> because the verification job actually checks that there is data in the
> columns.
> I am running a cluster with 12 nodes and a replication factor of 3.  I am
> using DC_QUORUM consistency when deleting.
> Any ideas?
> Joost.

Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of Riptano, the source for professional Cassandra support

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