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 >