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Ok, did a bit of testing and was able to create an LVM-over iSCSI to my FreeNAS box and moved one of my guests over. Sequential writes increased by a factor of 5 and I/O load never crossed 20%. So enterprise SSDs or iSCSI it is.

Would some DC S3700s be better? I don't need a lot of space (200GB is more than enough).

...but I don't see that from the host, only the guests. And I use these drives in other systems and haven't seen similar problems.

If I do any kind of heavy writes (1GB+) in any of my Linux guests it eventually causes the load to spike and suddenly all the other guests and proxmox itself grinds to a halt. I'm using ZFS with mirrored 120GB SSDs. I have another ZFS pair of 240GB SSD drives that I migrated a few of the...

I just dropped a new (to me) Mellanox 10GbE card into my box to replace the existing 1G. Is there an easy way to swap the networking over? I think I know how to do it from the command line - I've been using Debian long enough to just change the networking ports in the bridge interface, but I'm...