Can you clarify what you mean when you say 10-100K watchers? Do you mean 10-100K clients with 1 active watch, or some lesser number of clients with more watches, or a few clients doing a lot of watches and other clients doing other things?
-----Original Message----- From: Jeremy Hanna [mailto:jeremy.hanna1...@gmail.com] Sent: Thursday, November 18, 2010 12:15 PM To: email@example.com Subject: number of clients/watchers I had a question about number of clients against a zookeeper cluster. I was looking at having between 10,000 and 100,000 (towards 100,000) watchers within a single datacenter at a given time. Assuming that some fraction of that number are active clients and the r/w ratio is well within the zookeeper norms, is that number within the realm of possibility for zookeeper? We're going to do testing and benchmarking and things, but I didn't want to go down a rabbit hole if this is simply too much for a single zookeeper cluster to handle. The numbers I've seen in blog posts vary and I saw that the observers feature may be useful in this kind of setting. Maybe I'm underestimating zookeeper or maybe I don't have enough information to tell. I'm just trying to see if zookeeper is a good fit for our use case. Thanks.