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From Kunal <kunal.v...@gmail.com>
Subject Re: time tracking for down node for nodetool repair
Date Wed, 10 Apr 2019 02:19:46 GMT
Thanks everyone for your valuable suggestion.  Really appreciate it


Regards,
Kunal Vaid

On Mon, Apr 8, 2019 at 7:41 PM Nitan Kainth <nitankainth@gmail.com> wrote:

> Valid suggestion. Stick to the plan, avoid downtime of a node more than
> hinted handoff window. OR increase window to a larger value, if you know it
> is going to take longer than current setting
>
>
> Regards,
>
> Nitan
>
> Cell: 510 449 9629
>
> On Apr 8, 2019, at 8:43 PM, Soumya Jena <soumya.jena61111@gmail.com>
> wrote:
>
> Cassandra tracks it and no new hints will be created once the default 3
> hours window is passed  . However , cassandra will not automatically
> trigger a repair if your node is down for more than 3 hours .Default
> settings of 3 hours for hints is defined in cassandra.yaml file . Look for
> "max_hint_window_in_ms" in the cassandra.yaml file. Its configurable .
> Apart from the periodic repair you should start a repair when you bring up
> a node which has missed some writes .
>
> One more thing is  if node is down for long time and missed a lot of
> writes sometimes it may be better to add that as a new fresh node rather
> than adding it and then doing repair .
>
> On Mon, Apr 8, 2019 at 4:49 PM Stefan Miklosovic <
> stefan.miklosovic@instaclustr.com> wrote:
>
>> Ah I see it is the default for hinted handoffs. I was somehow thinking
>> its bigger figure I do not know why :)
>>
>> I would say you should run repairs continuously / periodically so you
>> would not even have to do some thinking about that and it should run
>> in the background in a scheduled manner if possible.
>>
>> Regards
>>
>> On Tue, 9 Apr 2019 at 04:19, Kunal <kunal.vaid@gmail.com> wrote:
>> >
>> > Hello everyone..
>> >
>> >
>> >
>> > I have a 6 node Cassandra datacenter, 3 nodes on each datacenter. If
>> one of the node goes down and remain down for more than 3 hr, I have to run
>> nodetool repair. Just wanted to ask if Cassandra  automatically tracks the
>> time when one of the Cassandra node goes down or do I need to write code to
>> track the time and run repair when node comes back online after 3 hrs.
>> >
>> >
>> > Thanks in anticipation.
>> >
>> > Regards,
>> > Kunal Vaid
>>
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>> --



Regards,
Kunal Vaid

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