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From Som Nair <nair...@outlook.com>
Subject Re: Multi-DC view of a single path?
Date Tue, 31 May 2016 17:09:42 GMT
I have the same use case of running a real time replicated DR cluster . Currently planning
to achieve  this with a combination of Read Only Observers and using the Curator TreeCache
watches to write into the DR cluster.

________________________________________
From: David Capwell <dcapwell@gmail.com>
Sent: Thursday, May 26, 2016 9:31 PM
To: user@zookeeper.apache.org
Subject: Re: Multi-DC view of a single path?

Thanks for the feedback
On May 26, 2016 10:26 AM, "Camille Fournier" <camille@apache.org> wrote:

> AFAIK you'll have to implement this yourself in a client somewhere. A
> script that watched for changes in the main DC and wrote them to the other
> zk instances. Alternately you could put observer nodes for this in the
> other dcs and have the client configured specifically to connect and read
> from this set of nodes for this data. But nothing out of the box will get
> this for you.
> On May 26, 2016 1:16 PM, "David Capwell" <dcapwell@gmail.com> wrote:
>
> > We have multiple data centers and a ZK cluster deployed in each.  One
> > of the needs of our application is to have a specific feature see the
> > same state in each DC (though if propagation takes a long time, thats
> > fine, we just eventually consistency cross DCs), but only one DC will
> > ever do the writing.
> >
> > What I have been trying to look for is a ability to replicate a
> > specific path (the path this feature uses) to the other ZK clusters,
> > but have not been in luck of finding such a thing.
> >
> > Thought about using a observer as well, but for each ZK cluster we
> > need it to behave like a normal cluster isolated to the DC for every
> > other use-case we have for ZK (membership/configs/etc.).
> >
> > Does anyone know of something out there that I could leverage?
> >
> > Thanks for your time reading this email.
> >
>

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