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From Paul Loy <ketera...@gmail.com>
Subject Re: Cluster not recovering when a single node dies
Date Fri, 27 May 2011 18:45:59 GMT
Sounds reasonable.

Thanks.

On Fri, May 27, 2011 at 7:12 PM, Jonathan Ellis <jbellis@gmail.com> wrote:

> It does not. (Most failures are transient, so Cassandra doesn't
> inflict the non-negligible performance impact of re-replicating a full
> node's worth of data until you tell it "that guys' not coming back
> this time.")
>
> On Fri, May 27, 2011 at 10:47 AM, Paul Loy <keteracel@gmail.com> wrote:
> > I guess my next question is: the data should be complete somewhere in the
> > ring with RF = 2. Does cassandra not redistribute the replication ring
> > without a nodetool decommission call?
> >
> > On Fri, May 27, 2011 at 4:45 PM, Paul Loy <keteracel@gmail.com> wrote:
> >>
> >> ahh, thanks.
> >>
> >> On Fri, May 27, 2011 at 4:43 PM, Jonathan Ellis <jbellis@gmail.com>
> wrote:
> >>>
> >>> Quorum of 2 is 2. You need at least RF=3 for quorum to tolerate losing
> >>> a node indefinitely.
> >>>
> >>> On Fri, May 27, 2011 at 10:37 AM, Paul Loy <keteracel@gmail.com>
> wrote:
> >>> > We have a 4 node cluster with a replication factor of 2. When one
> node
> >>> > dies,
> >>> > the other nodes throw UnavailableExceptions for quorum reads (as
> >>> > expected
> >>> > initially). They never get out of that state.
> >>> >
> >>> > Is there something we can do in nodetool to make the remaining nodes
> >>> > function?
> >>> >
> >>> > Thanks.
> >>> >
> >>> > --
> >>> > ---------------------------------------------
> >>> > Paul Loy
> >>> > paul@keteracel.com
> >>> > http://uk.linkedin.com/in/paulloy
> >>> >
> >>>
> >>>
> >>>
> >>> --
> >>> Jonathan Ellis
> >>> Project Chair, Apache Cassandra
> >>> co-founder of DataStax, the source for professional Cassandra support
> >>> http://www.datastax.com
> >>
> >>
> >>
> >> --
> >> ---------------------------------------------
> >> Paul Loy
> >> paul@keteracel.com
> >> http://uk.linkedin.com/in/paulloy
> >
> >
> >
> > --
> > ---------------------------------------------
> > Paul Loy
> > paul@keteracel.com
> > http://uk.linkedin.com/in/paulloy
> >
>
>
>
> --
> Jonathan Ellis
> Project Chair, Apache Cassandra
> co-founder of DataStax, the source for professional Cassandra support
> http://www.datastax.com
>



-- 
---------------------------------------------
Paul Loy
paul@keteracel.com
http://uk.linkedin.com/in/paulloy

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