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
