Failed zil devices will also cause this... Fred
From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-boun...@opensolaris.org] On Behalf Of Wolfram Tomalla Sent: Wednesday, December 08, 2010 10:40 PM To: Frank Van Damme Cc: zfs-discuss@opensolaris.org Subject: Re: [zfs-discuss] very slow boot: stuck at mounting zfs filesystems Hi Frank, you might face the problem of lots of snapshots of your filesystems. For each snapshot a device is created during import of the pool. This can easily lead to an extend startup time. At my system it took about 15 minutes for 3500 snapshots. 2010/12/8 Frank Van Damme <frank.vanda...@gmail.com<mailto:frank.vanda...@gmail.com>> Hello list, I'm having trouble with a server holding a lot of data. After a few months of uptime, it is currently rebooting from a lockup (reason unknown so far) but it is taking hours to boot up again. The boot process is stuck at the stage where it says: mounting zfs filesystems (1/5) the machine responds to pings and keystrokes. I can see disk activity; the disk leds blink one after another. The file system layout is: a 40 GB mirror for the syspool, and a raidz volume over 4 2TB disks which I use for taking backups (=the purpose of this machine). I have deduplication enabled on the "backups" pool (which turned out to be pretty slow for file deletes since there are a lot of files on the "backups" pool and I haven't installed an l2arc yet). The main memory is 6 GB, it's an HP server running Nexenta core platform (kernel version 134f). I assume sooner or later the machine will boot up, but I'm in a bit of a panic about how to solve this permanently - after all the last thing I want is not being able to restore data one day because it takes days to boot the machine. Does anyone have an idea how much longer it may take and if the problem may have anything to do with dedup? -- Frank Van Damme No part of this copyright message may be reproduced, read or seen, dead or alive or by any means, including but not limited to telepathy without the benevolence of the author. _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org<mailto:zfs-discuss@opensolaris.org> http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
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