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From Ritesh Tijoriwala <tijoriwala.rit...@gmail.com>
Subject Re: Question about Clustered Setup in two data centers
Date Wed, 02 Mar 2011 18:09:01 GMT
Hi Jesse,
Yes, you could do that. But it all depends on the frequency of operations
and how often you use the coordination service. If those are quite frequent,
then the HQ will most likely become a bottleneck. It is mostly not a good
idea to run coordination services across data centers for operations that
are frequent.


On Wed, Mar 2, 2011 at 9:56 AM, Jesse Kempf <jesse@twitter.com> wrote:

> Hi Zsolt,
> If the customer has a computer room at their headquarters, you could keep
> two ZKs in each datacenter and a fifth ZK at their HQ. In that case you
> could lose a datacenter and still have quorum.
> Cheers,
> -Jesse
> On Mar 2, 2011, at 2:57 PM, Zsolt Beothy-Elo wrote:
> > Hi all,
> > in our product we currently implement to use ZooKeeper in conjunction
> with CXF to dynamically manage available services and endpoints.
> Unfortunately one of our customers is not very happy of having to run a
> minimum of three ZooKeeper server instances to ensure fail over. The
> customer has two data centers in different locations where data and
> applications are replicated and some big-ip appliance in front of the data
> centers. If one data center fails everything must still be operable. So he
> would prefer to only have two  instances one in each data center. I would be
> grateful for some advise how to best cope with these contradicting
> requirements.
> >
> > Cheers,
> > Zsolt Beothy-Elo

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