Hi, On 07/31/2012 01:10 PM, James Gibbon wrote: > OK. The VM images for the cluster are stored in two Cisco NAS > units. Both the physical servers are connected to these using > iSCSI, through two Cisco gigabit switches. So for example a > particular VM disk image might be visible, from both servers, > as /dev/mapper/drbdvg0-vm--104--disk--1.
I see. Quite unusual I'd say, to have two drbd nodes that each use a NAS as backing device. But it looks sound, judging from the config. Thanks for that. Out of curiosity: Do you gain *any* advantage from using NAS in this setup instead of local disks in your drbd nodes? I'd like to point out that the drbd latency cost per write in this setup is probably (RTT between nodes) + (RTT between secondary and NAS), which may be small overhead, but potentially sub-optimal nontheless. Cheers, Felix _______________________________________________ drbd-user mailing list [email protected] http://lists.linbit.com/mailman/listinfo/drbd-user
