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From Kasun Weranga <kas...@wso2.com>
Subject Re: Issue when deleting Cassandra rowKeys.
Date Sun, 27 Jan 2013 14:29:31 GMT
Hi,

After running compaction tombstones get removed. So It seems like only
setting GC grace seconds to lower value is not enough. Am I correct ?

Thanks,
Kasun

On Sun, Jan 27, 2013 at 1:31 PM, Kasun Weranga <kasunw@wso2.com> wrote:

> Hi,
>
> On Sun, Jan 27, 2013 at 12:05 AM, Michael Kjellman <
> mkjellman@barracuda.com> wrote:
>
>> What is your gc_grace set to?
>>
>
> Thanks for the info.
>
> I tried setting GcGraceSeconds for the column family to 0 since I have
> only one Cassandra node. still I can see the same behavior.
>
>     ColumnFamily: bam_phone_retail_store_kpi
>       Key Validation Class: org.apache.cassandra.db.marshal.BytesType
>       Default column value validator:
> org.apache.cassandra.db.marshal.BytesType
>       Columns sorted by: org.apache.cassandra.db.marshal.BytesType
>       GC grace seconds: 0
>       Compaction min/max thresholds: 4/32
>       Read repair chance: 0.0
>       DC Local Read repair chance: 0.0
>       Replicate on write: false
>       Caching: KEYS_ONLY
>       Bloom Filter FP chance: default
>       Compaction Strategy:
> org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy
>       Compression Options:
>         chunk_length_kb: 128
>         sstable_compression:
> org.apache.cassandra.io.compress.SnappyCompressor
>
>
> I am using Cassandra 1.1.3. Appreciate your help on solving this.
>
> Thanks,
> Kasun.
>
>
>
>>
>> Are your findings before or after this time after the deletion?
>>
>> From: Kasun Weranga <kasunw@wso2.com>
>> Reply-To: "user@cassandra.apache.org" <user@cassandra.apache.org>
>> Date: Saturday, January 26, 2013 10:33 AM
>> To: "user@cassandra.apache.org" <user@cassandra.apache.org>, "
>> dev@cassandra.apache.org" <dev@cassandra.apache.org>
>> Subject: Issue when deleting Cassandra rowKeys.
>>
>> Hi all,
>>
>> When I delete some rowkeys programmatically I can see two rowkeys remains
>> in the column family. I think it is due to tombstones. Is there a way to
>> remove it when deleting rowkeys. Can I run compaction programmatically
>> after deletion? will it remove all these remaining rowkeys.
>>
>> Thanks,
>> Kasun.
>>
>>

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