Date: Sat, 15 May 2010 21:03:00 +0300 From: Mike Barnard <mike.barnardq@gmail.com> To: bf1783@gmail.com Cc: freebsd-questions@freebsd.org Subject: Re: UFS Journaling Message-ID: <AANLkTiksw7vuenkrtIWP9oQMdeifBGDurDsWC7BYIev_@mail.gmail.com> In-Reply-To: <AANLkTinCtG3ZicNzG3M4jFQ0yT8YqN8WFdVkm3W9tWH-@mail.gmail.com> References: <AANLkTinCtG3ZicNzG3M4jFQ0yT8YqN8WFdVkm3W9tWH-@mail.gmail.com>
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On Sat, May 15, 2010 at 8:33 PM, b. f. <bf1783@googlemail.com> wrote: > >Hi, > > > >I'm trying out gjournal before I implement if on one server. I require > more > >than 8 partitions, but since I cannot do this, have 9 partitions on one > > You can do this with gpart and a GPT scheme. > > hmmmm... I'll dig into this and read on it. > > >slice, I have created two slices on the disk, da0s1 (100GB) and da0s2 > >(40GB). On the first slice, I have my usual partitions. On the second > slice, > >I have two partitions, each 20GB (da0s2d and da0s2e) that will be used as > >the journal providers. > > > >I need to journaled two partitions /usr (da0s1f) and /resource (da0s1g). I > >have done the following to get my data providers and journal providers > > > >-- boot into single usermode > >-- unmount /usr and /resource > >-- gjournal load > >-- gjournal label -f da0s1f da0s2d > >-- gjournal label -f da0s1g da0s2e > >-- tunefs -J enable -n disable da0s1f.journal > >-- tunefs -J enable -n disable da0s1g.journal > >-- mount /dev/da0s1f.journal /usr and mount /dev/da0s1g.journal /resource. > >Each mount with -o async > >-- edited fstab to mount the data providers > > Er, by the above do you mean "mount the journal devices"? As in, > adding something like: > > /dev/da0s1f.journal /usr ufs rw,async 2 2 > /dev/da0s1g.journal /resource ufs rw,async 2 > 2 > > and eliminating the previously existing entries for /usr and > /resource? If you have something else involving /usr, /resource, or > any of the providers, that could cause serious problems. > > Sorry... I was a little tired and did not read over what I had written. In my fstab, I have the journal devices as you have mentioned. > >-- edited loader.conf and added geom_journal_load="YES" > > > >If I enter ctrl+d, I continue to multi usermode with no problem. However, > I > >needed to reboot and I get the messages below when it tries to mount the > >partitions: > > > >Root mount waiting for: GJOURNAL GJOURNAL > >Root mount waiting for: GJOURNAL GJOURNAL > >GEOM_JOURNAL: Timeout. Journal gjournal 3033687591 cannot be completed > >GEOM_JOURNAL: Journal 3033687591 : da0s1f contains data. > >Root mount waiting for: GJOURNAL GJOURNAL > >Root mount waiting for: GJOURNAL GJOURNAL > >GEOM_JOURNAL: Timeout. Journal gjournal 107992178 cannot be completed > >GEOM_JOURNAL: Journal 107992178 : da0s1g contains data. > >Root mount waiting for: GJOURNAL GJOURNAL > >Root mount waiting for: GJOURNAL GJOURNAL > >GEOM_JOURNAL: Timeout. Journal gjournal 3033687591 cannot be completed > >GEOM_JOURNAL: Journal 3033687591 : ufsid/4bed9437003f40f4 contains data. > >Root mount waiting for: GJOURNAL GJOURNAL > >Root mount waiting for: GJOURNAL GJOURNAL > >GEOM_JOURNAL: Timeout. Journal gjournal 3033687591 cannot be completed > >GEOM_JOURNAL: Journal 3033687591 : ufsid/4bed9437dfb979f4 contains data. > > > >This goes on and on... I cannot go beyond this point. Did I miss > something? > > > > You may want to start from scratch, after having zero'd out the disk, > to eliminate any garbage from previous installations that may confuse > geom. What kind of a disk is da0? What kind of bus is it on? > > sigh... i did... about 5 times... and I still ended up at the same point... Root mount waiting for.... :-( > >PS: I started off with a journal provider partition of 5GB and increased > all > >the way to 20GB. This was after I googled and read that this error will > >occur if the journal provider size is small. I have attempted this with > the > >journal provider partions on the first slice, da0s1 and also on the second > >sloce da0s2. All get me the above error. > > > > Holy mammoth journals, Batman! If you want to be _conservative_, you > should have journals that are about: > > 2* kern.geom.journal.switch_time * maximum disk throughput per second > > That's about > > 2 * 10s * 200 MB/s > > or roughly 3.9GB, and that's for a fast drive, so 20GB is probably > overkill. You can monitor various useful statistics and settings by > looking at "sysctl kern.geom.journal". Among other things, those > sysctls can tell you about full journals and cache misses. > > My first journals were 4GB in size, but I got the errors mentioned above. I googled and what I found was a reference to the journals being too small compared to the data providers. There is a suggestion<http://www.freebsd.org/doc/en/articles/gjournal-desktop/>that was given to have the journal sizes 3.3 x RAM. This seemed a little too big for my setup. I have 8GB RAM. Im puzzled on this one :-/ -- Mike Of course, you might discount this possibility, but remember that one in a million chances happen 99% of the time. ------------------------------------------------------------
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