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Posted to user@cassandra.apache.org by Alexis Midon <al...@gmail.com> on 2012/10/15 20:56:25 UTC
run repair on each node or every R nodes?
Hi all,
I have a 9-node cluster with a replication factor R=3. When I run repair
-pr on node-00, I see the exact same load and activity on node-{01,02}.
Specifically, compactionstats shows the same Validation tasks.
Does this mean that all 3 nodes will be repaired when nodetool returns? or
do I still have to trigger a nodetool-repair on node-{01,02}?
Thanks,
Alexis
Re: run repair on each node or every R nodes?
Posted by Radim Kolar <hs...@filez.com>.
what if first node in range is down? then -pr would be ineffective
Re: run repair on each node or every R nodes?
Posted by Alexis Midon <al...@gmail.com>.
Thank you guys. It makes sense.
I'll have repair-pr schedule on each node.
On Thu, Oct 18, 2012 at 3:39 AM, aaron morton <aa...@thelastpickle.com>wrote:
> Without -pr the repair works on all token ranges the node is a replica
> for.
>
> With -pr it only repairs data in the token range it is assigned. In your
> case when you ran it on node 0 with RF the token range form node 0 was
> repaired on nodes 0, 1 and 2. The other token ranges on nodes 0, 1 and 2
> were not repaired.
>
> Cheers
>
>
> -----------------
> Aaron Morton
> Freelance Developer
> @aaronmorton
> http://www.thelastpickle.com
>
> On 18/10/2012, at 5:15 AM, Andrey Ilinykh <ai...@gmail.com> wrote:
>
>
> In my mind it does make sense, and what you're saying is correct. But I
> read
> that it was better to run repair in each node with a "-pr" option.
>
> Alain
>
> Yes, it's correct. Running repair -pr on each node you repair whole
> cluster without job duplication.
>
> Andrey
>
>
>
Re: run repair on each node or every R nodes?
Posted by aaron morton <aa...@thelastpickle.com>.
Without -pr the repair works on all token ranges the node is a replica for.
With -pr it only repairs data in the token range it is assigned. In your case when you ran it on node 0 with RF the token range form node 0 was repaired on nodes 0, 1 and 2. The other token ranges on nodes 0, 1 and 2 were not repaired.
Cheers
-----------------
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 18/10/2012, at 5:15 AM, Andrey Ilinykh <ai...@gmail.com> wrote:
>>
>> In my mind it does make sense, and what you're saying is correct. But I read
>> that it was better to run repair in each node with a "-pr" option.
>>
>> Alain
>>
> Yes, it's correct. Running repair -pr on each node you repair whole
> cluster without job duplication.
>
> Andrey
Re: run repair on each node or every R nodes?
Posted by Andrey Ilinykh <ai...@gmail.com>.
>
> In my mind it does make sense, and what you're saying is correct. But I read
> that it was better to run repair in each node with a "-pr" option.
>
> Alain
>
Yes, it's correct. Running repair -pr on each node you repair whole
cluster without job duplication.
Andrey
Re: run repair on each node or every R nodes?
Posted by Alain RODRIGUEZ <ar...@gmail.com>.
"I see. So if I don't use the '-pr' option, triggering repair on node-00 is
sufficient to repair the first 3 nodes.
No need to cron a repair on node-{01,02}.
correct?"
"forget it. this was nonsense."
In my mind it does make sense, and what you're saying is correct. But I
read that it was better to run repair in each node with a "-pr" option.
Alain
2012/10/16 Alexis Midon <al...@gmail.com>
> forget it. this was nonsense.
>
>
> On Mon, Oct 15, 2012 at 10:05 PM, Alexis Midon <al...@gmail.com>wrote:
>
>> I see. So if I don't use the '-pr' option, triggering repair on node-00
>> is sufficient to repair the first 3 nodes.
>> No need to cron a repair on node-{01,02}.
>> correct?
>>
>> thanks for your answer.
>>
>>
>> On Mon, Oct 15, 2012 at 6:51 PM, Andrey Ilinykh <ai...@gmail.com>wrote:
>>
>>> Only one region (node-00 is responsible for) will get repaired on all
>>> three nodes.
>>> Andrey
>>> On Mon, Oct 15, 2012 at 11:56 AM, Alexis Midon <al...@gmail.com>
>>> wrote:
>>> >
>>> > Hi all,
>>> >
>>> > I have a 9-node cluster with a replication factor R=3. When I run
>>> repair -pr
>>> > on node-00, I see the exact same load and activity on node-{01,02}.
>>> > Specifically, compactionstats shows the same Validation tasks.
>>> > Does this mean that all 3 nodes will be repaired when nodetool
>>> returns? or
>>> > do I still have to trigger a nodetool-repair on node-{01,02}?
>>> >
>>> > Thanks,
>>> >
>>> > Alexis
>>>
>>
>>
>
Re: run repair on each node or every R nodes?
Posted by Alexis Midon <al...@gmail.com>.
forget it. this was nonsense.
On Mon, Oct 15, 2012 at 10:05 PM, Alexis Midon <al...@gmail.com>wrote:
> I see. So if I don't use the '-pr' option, triggering repair on node-00 is
> sufficient to repair the first 3 nodes.
> No need to cron a repair on node-{01,02}.
> correct?
>
> thanks for your answer.
>
>
> On Mon, Oct 15, 2012 at 6:51 PM, Andrey Ilinykh <ai...@gmail.com>wrote:
>
>> Only one region (node-00 is responsible for) will get repaired on all
>> three nodes.
>> Andrey
>> On Mon, Oct 15, 2012 at 11:56 AM, Alexis Midon <al...@gmail.com>
>> wrote:
>> >
>> > Hi all,
>> >
>> > I have a 9-node cluster with a replication factor R=3. When I run
>> repair -pr
>> > on node-00, I see the exact same load and activity on node-{01,02}.
>> > Specifically, compactionstats shows the same Validation tasks.
>> > Does this mean that all 3 nodes will be repaired when nodetool returns?
>> or
>> > do I still have to trigger a nodetool-repair on node-{01,02}?
>> >
>> > Thanks,
>> >
>> > Alexis
>>
>
>
Re: run repair on each node or every R nodes?
Posted by Alexis Midon <al...@gmail.com>.
I see. So if I don't use the '-pr' option, triggering repair on node-00 is
sufficient to repair the first 3 nodes.
No need to cron a repair on node-{01,02}.
correct?
thanks for your answer.
On Mon, Oct 15, 2012 at 6:51 PM, Andrey Ilinykh <ai...@gmail.com> wrote:
> Only one region (node-00 is responsible for) will get repaired on all
> three nodes.
> Andrey
> On Mon, Oct 15, 2012 at 11:56 AM, Alexis Midon <al...@gmail.com>
> wrote:
> >
> > Hi all,
> >
> > I have a 9-node cluster with a replication factor R=3. When I run repair
> -pr
> > on node-00, I see the exact same load and activity on node-{01,02}.
> > Specifically, compactionstats shows the same Validation tasks.
> > Does this mean that all 3 nodes will be repaired when nodetool returns?
> or
> > do I still have to trigger a nodetool-repair on node-{01,02}?
> >
> > Thanks,
> >
> > Alexis
>
Re: run repair on each node or every R nodes?
Posted by Andrey Ilinykh <ai...@gmail.com>.
Only one region (node-00 is responsible for) will get repaired on all
three nodes.
Andrey
On Mon, Oct 15, 2012 at 11:56 AM, Alexis Midon <al...@gmail.com> wrote:
>
> Hi all,
>
> I have a 9-node cluster with a replication factor R=3. When I run repair -pr
> on node-00, I see the exact same load and activity on node-{01,02}.
> Specifically, compactionstats shows the same Validation tasks.
> Does this mean that all 3 nodes will be repaired when nodetool returns? or
> do I still have to trigger a nodetool-repair on node-{01,02}?
>
> Thanks,
>
> Alexis
Re: run repair on each node or every R nodes?
Posted by Will Martin <wi...@voodoolunchbox.com>.
+1 Is this a consensus activity and is the master fixed, or does the voting process migrate during the cycles??
On Oct 15, 2012, at 2:56 PM, Alexis Midon wrote:
>
> Hi all,
>
> I have a 9-node cluster with a replication factor R=3. When I run repair -pr on node-00, I see the exact same load and activity on node-{01,02}. Specifically, compactionstats shows the same Validation tasks.
> Does this mean that all 3 nodes will be repaired when nodetool returns? or do I still have to trigger a nodetool-repair on node-{01,02}?
>
> Thanks,
>
> Alexis