Date: Thu, 22 Sep 2016 17:38:32 +0300 From: Slawa Olhovchenkov <slw@zxy.spb.ru> To: "Eugene M. Zheganin" <emz@norma.perm.ru> Cc: freebsd-stable@FreeBSD.org Subject: Re: zvol clone diffs Message-ID: <20160922143832.GJ2960@zxy.spb.ru> In-Reply-To: <57E3C705.2010702@norma.perm.ru> References: <57E3C705.2010702@norma.perm.ru>
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On Thu, Sep 22, 2016 at 04:56:53PM +0500, Eugene M. Zheganin wrote: > Hi. > > I should mention from the start that this is a question about an > engineering task, not a question about FreeBSD issue. > > I have a set of zvol clones that I redistribute over iSCSI. Several > Windows VMs use these clones as disks via their embedded iSCSI > initiators (each clone represents a disk with an NTFS partition, is > imported as a "foreign" disk and functions just fine). From my opinion, > they should not have any need to do additional writes on these clones > (each VM should only read data, from my point of view). But zfs shows > they do, and sometimes they write a lot of data, so clearly facts and > expactations differ a lot - obviously I didn't take something into > accounting. May be atime like on NTFS? http://serverfault.com/questions/33932/how-do-you-disable-the-last-accessed-attribute-on-ntfs-windows
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