cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Edward Capriolo <edlinuxg...@gmail.com>
Subject Re: Question regarding tombstone removal on 0.6.4
Date Tue, 31 Aug 2010 20:13:41 GMT
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.   After
>> running my application for ~60K iterations, I stopped the application, then
>> performed
>>
>> Nodetool flush on my Keyspace, the a nodetool compact, repeating this for
>> each node in the cluster.
>>
>>
>>
>> Then I exported with sstabletojson on one of my CFs and  upon examining the
>> json – 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:  I understood that a nodetool compact would cause the
>> tombstone entries to be removed, is this true?
>>
>>
>>
>> Thanks
>>
>>
>>
>> CONFIDENTIALITY NOTICE: This e-mail and any files attached may contain
>> confidential and proprietary information of Alcatel-Lucent and/or its
>> affiliated entities. Access by the intended recipient only is authorized.
>> Any liability arising from any party acting, or refraining from acting, on
>> any information contained in this e-mail is hereby excluded. If you are not
>> the intended recipient, please notify the sender immediately, destroy the
>> original transmission and its attachments and do not disclose the contents
>> to any other person, use it for any purpose, or store or copy the
>> information in any medium. Copyright in this e-mail and any attachments
>> belongs to Alcatel-Lucent and/or its affiliated entities.
>
>
>
> --
> 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.

Mime
View raw message