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> > 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 > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss >
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