Date: Sat, 13 Apr 2013 20:03:47 +0200 From: mxb <mxb@alumni.chalmers.se> To: "freebsd-fs@freebsd.org" <freebsd-fs@freebsd.org> Subject: Re: ZFS: ZIL device export/import Message-ID: <BCBD7CDE-1BBB-4855-9240-897770FEF822@alumni.chalmers.se> In-Reply-To: <51699B8E.7050003@platinum.linux.pl> References: <5A2824CA-2A67-47FA-AB27-20C6EBD2C501@alumni.chalmers.se> <51699B8E.7050003@platinum.linux.pl>
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Yes, will this require some additional interactions. The big question is WHY export/import works fine for L2ARC device (cache), but not for log (ZIL device) ? Well, I tried to partition and then label (via glabel) slices on both ZIL and L2ARC, the created a new pool with labels. Result is the same - L2ARC gets attached upon import, but not ZIL. GUID reported by 'zdb' is the same for ZIL-partitions on both HU (as well as for L2ARC). The size of cause is the same. //mxb On 13 apr 2013, at 19:53, Adam Nowacki <nowakpl@platinum.linux.pl> wrote: > On 2013-04-13 19:33, mxb wrote: >> >> Hello list, >> >> I'm currently have 2x Head Units (HU) [FreeBSD 9.1] connected to the same JBOD via SAS Expander. >> Each HU has separate ZIL and L2ARC devices. Hardware on both HU (inc. SSD disks for ZIL/L2ARC) is identical. >> >> This is basically a HA-setup. >> >> The I do an 'zpool export tank' on the first HU and do 'zpool import tank' on the second one, only L2ARC device appears usable. >> Import fails, complaining about ZIL device not present. >> >> According to the man page zpool(8) ZIL device can be imported and exported. >> >> "… Log devices can be added, replaced, attached, detached, imported and >> exported as part of the larger pool. …". >> >> Do I miss something here? >> This feature not implemented yet? >> Any way to work around this, except that moving ZIL into JBOD? > > From the same man page: > -m Enables import with missing log devices. > > ... but that won't be HA since on unclean shutdown of one the other won't be able to replay the log and some recent writes (or worse) will be lost. > > _______________________________________________ > freebsd-fs@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-fs > To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org"
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