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From Terje Marthinussen <tmarthinus...@gmail.com>
Subject Re: Multi-DC Deployment
Date Tue, 19 Apr 2011 06:16:25 GMT
Hum...

Seems like it could be an idea in a case like this with a mode where result
is always returned (if possible), but where a flay saying if the consistency
level was met, or to what level it was met (number of nodes answering for
instance).?

Terje

On Tue, Apr 19, 2011 at 1:13 AM, Jonathan Ellis <jbellis@gmail.com> wrote:

> They will timeout until failure detector realizes the DC1 nodes are
> down (~10 seconds). After that they will immediately return
> UnavailableException until DC1 comes back up.
>
> On Mon, Apr 18, 2011 at 10:43 AM, Baskar Duraikannu
> <baskar.duraikannu.db@gmail.com> wrote:
> > We are planning to deploy Cassandra on two data centers.   Let us say
> that
> > we went with three replicas with 2 being in one data center and last
> replica
> > in 2nd Data center.
> >
> > What will happen to Quorum Reads and Writes when DC1 goes down (2 of 3
> > replicas are unreachable)?  Will they timeout?
> >
> >
> > Regards,
> > Baskar
>
>
>
> --
> Jonathan Ellis
> Project Chair, Apache Cassandra
> co-founder of DataStax, the source for professional Cassandra support
> http://www.datastax.com
>

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