Hi, All, I'd like to add a global timestamp oracle on Zookeep to assign globally unique timestamp for each Put/Get issued from HBase cluster. The reason I put it on Zookeeper is that each Put/Get needs to go through it and unique timestamp needs some global centralised facility to do it. But I am asking how practical is this scheme, like anyone used in practice?
Also, how difficulty is it to extend Zookeeper, or to inject code to the code path of HBase inside Zookeeper. I know HBase has Coprocessor on region server to let programmer to extend without recompiling HBase itself. Does Zk allow such extensibility? Thanks. Regards Yun
