Hi Zsolt, If the customer has a computer room at their headquarters, you could keep two ZKs in each datacenter and a fifth ZK at their HQ. In that case you could lose a datacenter and still have quorum.
Cheers, -Jesse On Mar 2, 2011, at 2:57 PM, Zsolt Beothy-Elo wrote: > Hi all, > in our product we currently implement to use ZooKeeper in conjunction with > CXF to dynamically manage available services and endpoints. Unfortunately one > of our customers is not very happy of having to run a minimum of three > ZooKeeper server instances to ensure fail over. The customer has two data > centers in different locations where data and applications are replicated and > some big-ip appliance in front of the data centers. If one data center fails > everything must still be operable. So he would prefer to only have two > instances one in each data center. I would be grateful for some advise how to > best cope with these contradicting requirements. > > Cheers, > Zsolt Beothy-Elo
