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From ruslan usifov <ruslan.usi...@gmail.com>
Subject Re: need of regular nodetool repair
Date Wed, 11 Apr 2012 09:04:12 GMT
HH - this is hinted handoff?

2012/4/11 Igor <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>
>
>>  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>
>>
>>> 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>
>>>
>>>> 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
>>>
>>>
>>
>>
>
>
>  --
> With kind regards,
>
>  Robin Verlangen
> www.robinverlangen.nl
>
>
>

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