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From Ken Hancock <ken.hanc...@schange.com>
Subject Re: nodetool repair -snapshot option?
Date Tue, 01 Jul 2014 15:44:03 GMT
I also expanded on a script originally written by Matt Stump @ Datastax.
The readme has the reasoning behind requiring sub-range repairs.

https://github.com/hancockks/cassandra_range_repair




On Mon, Jun 30, 2014 at 10:20 PM, Phil Burress <philburresseme@gmail.com>
wrote:

> @Paulo, this is very cool! Thanks very much for the link!
>
>
> On Mon, Jun 30, 2014 at 9:37 PM, Paulo Ricardo Motta Gomes <
> paulo.motta@chaordicsystems.com> wrote:
>
>> If you find it useful, I created a tool where you input the node IP,
>> keyspace, column family, and optionally the number of partitions (default:
>> 32K), and it outputs the list of subranges for that node, CF, partition
>> size: https://github.com/pauloricardomg/cassandra-list-subranges
>>
>> So you can basically iterate over the output of that and do subrange
>> repair for each node and cf, maybe in parallel. :)
>>
>>
>> On Mon, Jun 30, 2014 at 10:26 PM, Phil Burress <philburresseme@gmail.com>
>> wrote:
>>
>>> One last question. Any tips on scripting a subrange repair?
>>>
>>>
>>> On Mon, Jun 30, 2014 at 7:12 PM, Phil Burress <philburresseme@gmail.com>
>>> wrote:
>>>
>>>> We are running repair -pr. We've tried subrange manually and that seems
>>>> to work ok. I guess we'll go with that going forward. Thanks for all the
>>>> info!
>>>>
>>>>
>>>> On Mon, Jun 30, 2014 at 6:52 PM, Jaydeep Chovatia <
>>>> chovatia.jaydeep@gmail.com> wrote:
>>>>
>>>>> Are you running full repair or on subset? If you are running full
>>>>> repair then try running on sub-set of ranges which means less data to
worry
>>>>> during repair and that would help JAVA heap in general. You will have
to do
>>>>> multiple iterations to complete entire range but at-least it will work.
>>>>>
>>>>> -jaydeep
>>>>>
>>>>>
>>>>> On Mon, Jun 30, 2014 at 3:22 PM, Robert Coli <rcoli@eventbrite.com>
>>>>> wrote:
>>>>>
>>>>>> On Mon, Jun 30, 2014 at 3:08 PM, Yuki Morishita <mor.yuki@gmail.com>
>>>>>> wrote:
>>>>>>
>>>>>>> Repair uses snapshot option by default since 2.0.2 (see NEWS.txt).
>>>>>>>
>>>>>>
>>>>>> As a general meta comment, the process by which operationally
>>>>>> important defaults change in Cassandra seems ad-hoc and sub-optimal.
>>>>>>
>>>>>> For to record, my view was that this change, which makes repair even
>>>>>> slower than it previously was, was probably overly optimistic.
>>>>>>
>>>>>> It's also weird in that it changes default behavior which has been
>>>>>> unchanged since the start of Cassandra time and is therefore probably
>>>>>> automated against. Why was it so critically important to switch to
snapshot
>>>>>> repair that it needed to be shotgunned as a new default in 2.0.2?
>>>>>>
>>>>>> =Rob
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>
>>>
>>
>>
>> --
>> *Paulo Motta*
>>
>> Chaordic | *Platform*
>> *www.chaordic.com.br <http://www.chaordic.com.br/>*
>> +55 48 3232.3200
>>
>
>


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