But if the slaves try to maintain a ZooKeeper connection there will be instability. WANs aren’t very reliable and ZK clients maintain a session. Do the slaves query only? What would happen if the slave lost connection to ZooKeeper?
-Jordan From: Tomas Barton [email protected] Reply: [email protected] [email protected] Date: June 8, 2014 at 8:06:47 AM To: user [email protected] Subject: Re: Slaves in a different dc/region? Hi, generally it should work. Mesos slave gets from ZooKeeper current master IP address. ZooKeepers should be deployed in one datacenter (usually 3 or 5 instances). If you will run on Mesos long term tasks it should be fine. If you would deploy e.g. Spark which tends to have quite short tasks (let's say few hundreds milliseconds), the computations might be slower due to longer communication. It really depends on your use case, it might be good idea to have a Mesos cluster in each datacenter. However you might try adjusting schedulers so that they would respect slaves location, e.g. prefer allocating task from one framework at the same datacenter, if the resources are available. Tomas On 8 June 2014 06:34, Jordan Zimmerman <[email protected]> wrote: Has anyone tried running a slave in a different datacenter than the master? It seems the slaves connect to ZooKeeper. Is that correct? If so, cross-data center might not work. Thanks!
