> -----Original Message----- > From: zfs-discuss-boun...@opensolaris.org > [mailto:zfs-discuss-boun...@opensolaris.org] On Behalf Of sol > Sent: Wednesday, July 28, 2010 3:12 PM > To: Richard Elling; Gregory Gee > Cc: zfs-discuss@opensolaris.org > Subject: Re: [zfs-discuss] Tips for ZFS tuning for NFS store > of VM images > > Richard Elling wrote: > > Gregory Gee wrote: > > > I am using OpenSolaris to host VM images over NFS for > XenServer. I'm looking > >for tips on what parameters can be set to help optimize my > ZFS pool that holds > >my VM images. > > There is nothing special about tuning for VMs, the normal > NFS tuning applies. > > > That's not been my experience. Out of the box VMware server > would not work with > the VMs stored on a zfs pool via NFS. I've not yet found out > why but the > analytics showed millions of getattr/access/lookup compared > to read/write. > > A partial workaround was to turn off access time on the share > and to mount with > noatime,actimeo=60 > > But that's not perfect because when left along the VM got > into a "stuck" state. > I've never seen that state before when the VM was hosted on a > local disk. > Hosting VMs on NFS is not working well so far...
My guess is that it's a VMware Server + NFS client issue, not a VMs on NFS issue. I'm using an OpenSolaris b134 system as an 'experimental' NFS datastore for VMware vSphere/ESX and it works great. I've had as many as 30 mixed-IO VMs running on the system with no reported issues. -Will _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
