2009/6/18 Gordan Bobic <gordan@xxxxxxxxxx>: > On Thu, 18 Jun 2009 17:11:42 +0530, Brahadambal Srinivasan > <brahadambal@xxxxxxxxx> wrote: >> Hi, >> >> I am trying to figure out if it is possible to create an RHCS cluster > among >> nodes that are in remote locations? If yes, then how are the following >> handled? : >> >> 1. Storage - how is the shared storage acheived? > > Same as it is achieved locally. It is up to your SAN to handle this in a > real-time, consistent way. You may want to look into DRBD > (http://www.drbd.org) for the block device level replication. Be aware, > however, that performance on the disk access front will be terrible, > because the latency will end up being limited by your ping time on the WAN. > So instead of it having 0.1ms added via a local gigabit interconnect, it'll > have 50-100ms added to it. Most applications will not produce usable > performance with this kind of disk I/O speed. I am wondering if that will affect both read and write requests or only write/verify ones (which DRBD have to replicate using the network). -- Giuseppe -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
