On Fri, Feb 26, 2010 at 2:42 PM, Lutz Schumann <presa...@storageconcepts.de>wrote:
> > Now If a virtual machine writes to the zvol, blocks are allocated on disk. > Reads are now partial from disk (for all blocks written) and from ZFS layer > (all unwritten blocks). > > If the virtual machine (which may be vmware / xen / hyperv) deletes blocks > / frees space within the zvol, this also means a write - usually in meta > data area only. Thus the underlaying Storage system does not know which > blocks in a zvol are really used. > Your're using VMs and *not* using dedupe?! VMs are almost the perfect use-case for dedupe :) -marc
_______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
