cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Robert Coli <rc...@eventbrite.com>
Subject Re: Parallel repairs
Date Mon, 17 Aug 2015 18:31:06 GMT
On Mon, Aug 17, 2015 at 8:50 AM, Stan Lemon <slemon@salesforce.com> wrote:,
>
> Thanks for the reply.  I do have vnodes.  I was not aware of the -par flag
> on the repair command, I was actually referring to have repair run on both
> nodes A & B at the same time.  It sounds like though, that I should
> probably be using this -par flag but to do it per node sequentially one
> after the other?
>

That's what I was suggesting, yes.


> Right now just running 'nodetool repair' on one node is taking ~3.5 days,
> with 24 nodes I am now starting to question whether or not I should be
> increasing gc_grace_second to be much longer than the default 10 days since
> it's going to take longer than 10 days to repair the whole cluster.
>

Yep, I personally recommend setting it to 34 days and then kicking off
repair on the first of the month. That way you have been 3 and 7 days for
it to complete, which should in most cases be enough time.

Have you unthrottled compaction and etc.? 10 days is a long time...

=Rob

Mime
View raw message