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From Saurabh Dutta <saurabh...@gmail.com>
Subject Re: Zookeeper Coodination Service
Date Thu, 17 Jan 2013 20:46:26 GMT
Thanks Edward and Greg.

Can you help me with a small java code snippet to achieve the same?

Thanks

On Thu, Jan 17, 2013 at 10:43 PM, Asta, Greg <greg.asta@omnigon.com> wrote:

> Yeah, we achieved something similar using a simple "VIP".  Once the leader
> election switches, the new leader can activate the VIP, while the old one
> deactivates it.  DNS with a very short TTL is another way to achieve this.
>
> -Greg
>
> -----Original Message-----
> From: Edward Ribeiro [mailto:edward.ribeiro@gmail.com]
> Sent: Thursday, January 17, 2013 12:06 PM
> To: user@zookeeper.apache.org
> Subject: Re: Zookeeper Coodination Service
>
> Yes, what you have just described is a sweet spot for Zookeeper.
>
> Based on your description, you want one of the servers as the leader and
> while having  the others waiting. Take a look at "Leader Election Recipe"
> in ZK Tutorials for how to implement this. If the leader goes offline then
> the other machines use ZK to run the election procedure and elect a new
> leader to serve requests. Of course, you will also need a "router" service
> that also listens to ZK so that it can redirect the requests to the right
> machine.
>
> Edward
>
> On Thu, Jan 17, 2013 at 2:02 PM, Saurabh Dutta <saurabh113@gmail.com>
> wrote:
>
> > Hi,
> >
> > I've a a simple tcp service which will listen on a port for incoming
> > requests from client. I'd like to have this same service run on
> > multiple servers in a failsafe manner.
> >
> > There will be a client which will initially write to server1 and if it
> > goes down i want the requests to be directed to server2.
> >
> > I'm tyring to write a a zookeeper coordinator which will keep my
> > services up and if one service goes down i want the other service to
> > take over and replace it.
> >
> > Please help me to explore if this can be done through zookeeper and if
> > yes how this can be achieved.
> >
> > Thanks,
> > Saurabh
> >
>
> -----
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