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From Jonathan Haddad <...@jonhaddad.com>
Subject Re: Repair taking long time
Date Fri, 26 Sep 2014 17:58:22 GMT
If you're using DSE you might want to contact Datastax support, rather
than the ML.

On Fri, Sep 26, 2014 at 10:52 AM, Gene Robichaux
<Gene.Robichaux@match.com> wrote:
> I am on DSE 4.0.3 which is 2.0.7.
>
>
>
> If 4.5.1 is NOT 2.1. I guess an upgrade will not buy me much…..
>
>
>
> The bad thing is that table is not our largest….. :(
>
>
>
>
>
> Gene Robichaux
>
> Manager, Database Operations
>
> Match.com
>
> 8300 Douglas Avenue I Suite 800 I Dallas, TX  75225
>
> Phone: 214-576-3273
>
>
>
> From: Brice Dutheil [mailto:brice.dutheil@gmail.com]
> Sent: Friday, September 26, 2014 12:47 PM
> To: user@cassandra.apache.org
> Subject: Re: Repair taking long time
>
>
>
> Unfortunately DSE 4.5.0 is still on 2.0.x
>
>
> -- Brice
>
>
>
> On Fri, Sep 26, 2014 at 7:40 PM, Jonathan Haddad <jon@jonhaddad.com> wrote:
>
> Are you using Cassandra 2.0 & vnodes?  If so, repair takes forever.
> This problem is addressed in 2.1.
>
>
> On Fri, Sep 26, 2014 at 9:52 AM, Gene Robichaux
> <Gene.Robichaux@match.com> wrote:
>> I am fairly new to Cassandra. We have a 9 node cluster, 5 in one DC and 4
>> in
>> another.
>>
>>
>>
>> Running a repair on a large column family seems to be moving much slower
>> than I expect.
>>
>>
>>
>> Looking at nodetool compaction stats it indicates the Validation phase is
>> running that the total bytes is 4.5T (4505336278756).
>>
>>
>>
>> This is a very large CF. The process has been running for 2.5 hours and
>> has
>> processed 71G (71950433062). That rate is about 28.4 GB per hour. At this
>> rate it will take 158 hours, just shy of 1 week.
>>
>>
>>
>> Is this reasonable? This is my first large repair and I am wondering if
>> this
>> is normal for a CF of this size. Seems like a long time to me.
>>
>>
>>
>> Is it possible to tune this process to speed it up? Is there something in
>> my
>> configuration that could be causing this slow performance? I am running
>> HDDs, not SSDs in a JBOD configuration.
>>
>>
>>
>>
>>
>>
>>
>> Gene Robichaux
>>
>> Manager, Database Operations
>>
>> Match.com
>>
>> 8300 Douglas Avenue I Suite 800 I Dallas, TX  75225
>>
>> Phone: 214-576-3273
>>
>>
>
>
> --
> Jon Haddad
> http://www.rustyrazorblade.com
> twitter: rustyrazorblade
>
>



-- 
Jon Haddad
http://www.rustyrazorblade.com
twitter: rustyrazorblade

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