Date: Mon, 11 Jan 2010 16:32:27 -0800 From: "K. Macy" <kmacy@freebsd.org> To: Dan Naumov <dan.naumov@gmail.com> Cc: freebsd-fs@freebsd.org, Damian Gerow <dgerow@afflictions.org>, FreeBSD-STABLE Mailing List <freebsd-stable@freebsd.org> Subject: Re: ZFS on top of GELI Message-ID: <82c4140e1001111632x2cbafbf3rf4c386184e9ba06f@mail.gmail.com> In-Reply-To: <cf9b1ee01001111624h138633c0l5d021b9f9c2ee500@mail.gmail.com> References: <cf9b1ee01001100708m7851418cmbb77cc3580d0fab3@mail.gmail.com> <20100110161206.GA86684@plebeian.afflictions.org> <cf9b1ee01001101019o51e9a52fi6d02905914508706@mail.gmail.com> <20100110184612.GC86684@plebeian.afflictions.org> <cf9b1ee01001101128v5d636ab6p1fa3e5bcc713273d@mail.gmail.com> <82c4140e1001111529u7d7ac409h63dda4cc10b76522@mail.gmail.com> <cf9b1ee01001111624h138633c0l5d021b9f9c2ee500@mail.gmail.com>
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> Ok, lets assume we have a dedicated ZIL on a single non-redundant > disk. This disk dies. How do you remove the dedicated ZIL from the > pool or replace it with a new one? Solaris ZFS documentation indicates > that this is possible for dedicated L2ARC - you can remove a dedicated > l2arc from a pool at any time you wish and should some IO fail on the > l2arc, the system will gracefully continue to run, reverting said IO > to be processed by the actual default built-in ZIL on the disks of the > pool. However the capability to remove dedicated ZIL or gracefully > handle the death of a non-redundant dedicated ZIL vdev does not > currently exist in Solaris/OpenSolaris at all. Ahh - you're describing an implementation flaw as opposed to a design flaw. Your initial statement could be interpreted as meaning that the ZIL is required for file system consistency. I hope they fix that. -Kip
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