You are viewing a plain text version of this content. The canonical link for it is here.
Posted to user@cassandra.apache.org by Daniel Doubleday <da...@gmx.net> on 2010/09/22 12:27:26 UTC
Re: nodetool repair
Hi all,
just wanted to make sure that I get this right:
What this means is that I have to schedule repairs only on every RFs node?
So with 4 nodes and RF=2 I would repair nodes 1 and 3
and with 6 nodes and RF=3 I would repair nodes 1 and 4
and that would lead to a synched cluster?
> On Thu, Jul 15, 2010 at 1:54 PM, B. Todd Burruss <bb...@real.com> wrote:
> > if i have N=3 and run nodetool repair on node X. i assume that merkle
> > trees (at a minimum) are calculated on nodes X, X+1, and X+2 (since
> > N=3). when the repair is finished are nodes X, X+1, and X+2 all in sync
> > with respect to node X's data?
>
> yes.
>
> --
> Jonathan Ellis
> Project Chair, Apache Cassandra
> co-founder of Riptano, the source for professional Cassandra support
> http://riptano.com
Re: nodetool repair
Posted by Gurpreet Singh <gu...@gmail.com>.
Is this also true for RackAware with alternating nodes from 2 datacenters on
the ring?
On Wed, Sep 22, 2010 at 7:28 AM, Jonathan Ellis <jb...@gmail.com> wrote:
> if you're using RackUnawareStrategy that should work.
>
> On Wed, Sep 22, 2010 at 5:27 AM, Daniel Doubleday
> <da...@gmx.net> wrote:
> > Hi all,
> >
> > just wanted to make sure that I get this right:
> >
> > What this means is that I have to schedule repairs only on every RFs
> node?
> >
> > So with 4 nodes and RF=2 I would repair nodes 1 and 3
> >
> > and with 6 nodes and RF=3 I would repair nodes 1 and 4
> >
> > and that would lead to a synched cluster?
> >
> > On Thu, Jul 15, 2010 at 1:54 PM, B. Todd Burruss <bb...@real.com>
> wrote:
> >> if i have N=3 and run nodetool repair on node X. i assume that merkle
> >> trees (at a minimum) are calculated on nodes X, X+1, and X+2 (since
> >> N=3). when the repair is finished are nodes X, X+1, and X+2 all in sync
> >> with respect to node X's data?
> >
> > yes.
> >
> > --
> > Jonathan Ellis
> > Project Chair, Apache Cassandra
> > co-founder of Riptano, the source for professional Cassandra support
> > http://riptano.com
> >
> >
>
>
>
> --
> Jonathan Ellis
> Project Chair, Apache Cassandra
> co-founder of Riptano, the source for professional Cassandra support
> http://riptano.com
>
Re: nodetool repair
Posted by Jonathan Ellis <jb...@gmail.com>.
if you're using RackUnawareStrategy that should work.
On Wed, Sep 22, 2010 at 5:27 AM, Daniel Doubleday
<da...@gmx.net> wrote:
> Hi all,
>
> just wanted to make sure that I get this right:
>
> What this means is that I have to schedule repairs only on every RFs node?
>
> So with 4 nodes and RF=2 I would repair nodes 1 and 3
>
> and with 6 nodes and RF=3 I would repair nodes 1 and 4
>
> and that would lead to a synched cluster?
>
> On Thu, Jul 15, 2010 at 1:54 PM, B. Todd Burruss <bb...@real.com> wrote:
>> if i have N=3 and run nodetool repair on node X. i assume that merkle
>> trees (at a minimum) are calculated on nodes X, X+1, and X+2 (since
>> N=3). when the repair is finished are nodes X, X+1, and X+2 all in sync
>> with respect to node X's data?
>
> yes.
>
> --
> Jonathan Ellis
> Project Chair, Apache Cassandra
> co-founder of Riptano, the source for professional Cassandra support
> http://riptano.com
>
>
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of Riptano, the source for professional Cassandra support
http://riptano.com