On Jan 10, 2012, at 2:59 PM, Rafał Radecki radecki.rafal@gmail.com wrote:
Hi all.
I am currently working for a hosting provider in a 100+ linux hosts' environment. We have www, mail HA solutions, as storage we mainly use NFS at the moment. We are also using DRBD, Heartbeat, Corosync.
I am now gathering info to make a cluster with:
- two virtualization nodes (active master and passive slave);
- two storage nodes (for vm files) used by mentioned virtualization
nodes (also active/passive).
For virtualization I am thinking to use OpenVZ or KVM. For storage NFS or iSCSI. Could you please share your experiences with these technologies? Which one would you use and why? Are there any good alternatives in CentOS?
For Linux virtualization on a scale greater then a couple of hosts I'd buy VMware and get a good SAN box with redundancy, say EMC, 3Par, NetApp or one of the middle tier like Equallogic, Lefthand or Compellent.
Otherwise a Xen cluster with an NFS store for the VM files (ease of management) and iSCSI for their data partitions (performance) using DRBD for fault tolerance.
-Ross