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References: 
 <E8EE4043A42D0846AD3CC043A0B6A84A03863AD6@NARSIL.us.int.genesyslab.com>
	<AANLkTimP0R14wPGtqkS=TaDPGwhyP_GqBz7nG=oXsWEC@mail.gmail.com>
Date: Tue, 31 Aug 2010 16:13:41 -0400
Message-ID: <AANLkTime6chdbKX3LCFczvoytD_+UEr9ZCo=Ns-TBRG+@mail.gmail.com>
Subject: Re: Question regarding tombstone removal on 0.6.4
From: Edward Capriolo <edlinuxguru@gmail.com>
To: user@cassandra.apache.org
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On Tue, Aug 31, 2010 at 4:06 PM, Jonathan Ellis <jbellis@gmail.com> wrote:
> does http://wiki.apache.org/cassandra/DistributedDeletes and
> http://wiki.apache.org/cassandra/MemtableSSTable help?
>
> On Tue, Aug 31, 2010 at 3:04 PM, Dwight Smith
> <Dwight.Smith@alcatel-lucent.com> wrote:
>> Hi
>>
>>
>>
>> I am running a three node cluster, everything works as expected.=A0=A0 A=
fter
>> running my application for ~60K iterations, I stopped the application, t=
hen
>> performed
>>
>> Nodetool flush on my Keyspace, the a nodetool compact, repeating this fo=
r
>> each node in the cluster.
>>
>>
>>
>> Then I exported with sstabletojson on one of my CFs and =A0upon examinin=
g the
>> json =96 all the entries had the tombstone flag true.
>>
>>
>>
>> This is correct, since all the application processes completed correctly=
,
>> and the entries should be removed.
>>
>>
>>
>> Now for the question: =A0I understood that a nodetool compact would caus=
e the
>> tombstone entries to be removed, is this true?
>>
>>
>>
>> Thanks
>>
>>
>>
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>
>
>
> --
> Jonathan Ellis
> Project Chair, Apache Cassandra
> co-founder of Riptano, the source for professional Cassandra support
> http://riptano.com
>

The tombstones have to be older then GCGracePeriod before major
compact will remove them.