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From Igor <i...@4friends.od.ua>
Subject Re: need of regular nodetool repair
Date Wed, 11 Apr 2012 09:10:31 GMT
On 04/11/2012 12:04 PM, ruslan usifov wrote:
> HH - this is hinted handoff?
>
Yes

> 2012/4/11 Igor <igor@4friends.od.ua <mailto:igor@4friends.od.ua>>
>
>     On 04/11/2012 11:49 AM, R. Verlangen wrote:
>
>     Not everything, just HH :)
>
>     I hope this works for me for the next reasons: I have quite large
>     RF (6 datacenters, each carry one replica of all dataset), read
>     and write at CL ONE, relatively small TTL - 10 days, I have no
>     deletes, servers almost never go down for hour. So I expect that
>     even if I loose some HH then some other replica will reply with
>     data.  Is it correct?
>
>     Hope this works for me, but can not work for others.
>
>
>>     Well, if everything works 100% at any time there should be
>>     nothing to repair, however with a distributed cluster it would be
>>     pretty rare for that to occur. At least that is how I interpret this.
>>
>>     2012/4/11 Igor <igor@4friends.od.ua <mailto:igor@4friends.od.ua>>
>>
>>         BTW, I heard that we don't need to run repair if all your
>>         data have TTL, all HH works,  and you never delete your data.
>>
>>
>>         On 04/11/2012 11:34 AM, ruslan usifov wrote:
>>>         Sorry fo my bad english, so QUORUM allow  doesn't make
>>>         repair regularity? But form your anser it does not follow
>>>
>>>         2012/4/11 R. Verlangen <robin@us2.nl <mailto:robin@us2.nl>>
>>>
>>>             Yes, I personally have configured it to perform a repair
>>>             once a week, as the GCGraceSeconds is at 10 days.
>>>
>>>             This is also what's in the manual
>>>             http://wiki.apache.org/cassandra/Operations#Repairing_missing_or_inconsistent_data
(point
>>>             2)
>>>
>>>
>>>             2012/4/11 ruslan usifov <ruslan.usifov@gmail.com
>>>             <mailto:ruslan.usifov@gmail.com>>
>>>
>>>                 Hello
>>>
>>>                 I have follow question, if we Read and write to
>>>                 cassandra claster with QUORUM consistency level,
>>>                 does this allow to us do not call nodetool repair
>>>                 regular? (i.e. every GCGraceSeconds)
>>>
>>>
>>>
>>>
>>>             -- 
>>>             With kind regards,
>>>
>>>             Robin Verlangen
>>>             www.robinverlangen.nl <http://www.robinverlangen.nl>
>>>
>>>
>>
>>
>>
>>
>>     -- 
>>     With kind regards,
>>
>>     Robin Verlangen
>>     www.robinverlangen.nl <http://www.robinverlangen.nl>
>>
>
>


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