Emmanuel Florac <eflorac@xxxxxxxxxxxxxx> writes: Bonsoir Emmanuel, > Le Thu, 23 Dec 2010 02:53:08 +0100 vous écriviez: > >> For a reason all my xfs FS got corrupted at the same time. >> My setup is: xen host using lvm on top of soft raid6 on top of jbod >> 3ware connected sata disks. >> Both the host and the VM fs got corrupted. > > RAID-6 is extremely stable on the 3Ware, while software RAID-6 is > dubbed experimental in the kernel. Software RAID can provide seducely > high performance when running benchmarks, but IMO it doesn't fly when > you need your CPU to do some other jobs, like running NFS daemons or > even worse, VMs. Under high CPU loads concurrently coming from the > software RAID and virtualisation stack, so many things may go > wrong... I can't agree more, I'm using both nfs AND VMs :) It is very slow and very cpu consuming. I'm moving away from xen to lxc on this home server, pretty sure it will help. > My advice : software RAID stinks under high CPU load/ high IO. Use > hardware RAID whenever possible because it provides more predictable > performance and remove many weird software interactions from the > picture. The 3w9550sx doesn't raid6, but I admit I've been thinking of using its raid5 instead of the slow soft raid6. Thanks for your advices :) -- Laurent _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
