Any example scripts for the rolling restart technique that anyone would be
kind enough to share?

Thanks
Avinash

On Wed, Jul 21, 2010 at 10:44 AM, Henry Robinson <he...@cloudera.com> wrote:

> Hi Avinash -
>
> (1) Is it possible to increase the number of observers in the cluster
> > dynamically?
> >
>
> Not really - you can use the same rolling-restart technique that is often
> mentioned on this list for adding servers to the ensemble, but you can't
> add
> them and expect that ZK will auto-find them.
>
>
> > (2) How many observers can I add given that I will seldom write into the
> > cluster but will have a lot of reads coming into the system? Can I run a
> > cluster with say 100 observers?
> >
> >
> This will be possible, but there is some overhead in communicating with
> observers as well as normal voting followers. However, given that writes
> are
> rare, perhaps this kind of overhead would be acceptable?
>
> Henry
>
>
> > Any insight would be very helpful.
> >
> > Thanks
> > A
> >
>
>
>
> --
> Henry Robinson
> Software Engineer
> Cloudera
> 415-994-6679
>

Reply via email to