* [linux-lvm] [catch22] lvm vs reiserfs @ 2001-03-22 19:46 Ed Tomlinson 2001-03-22 20:10 ` Chris Mason 0 siblings, 1 reply; 7+ messages in thread From: Ed Tomlinson @ 2001-03-22 19:46 UTC (permalink / raw) To: reiserfs-list; +Cc: linux-lvm Hi, I decided to really try out some of the features built into 2.4. Using a 2.4.2-ac20 kernel I my root on /dev/lv/root as a reiserfs filesystem. So far so good. Now I want to back it up. So I created a snapshot with lvcreate -L 50 -s -n snap /dev/lv/root. This works too. Problem happens when I want to mount /dev/lv/snap to back it up logically. At this point reiserfs wants to replay its journal.... Of course it cannot (snapshot=ro). How can this be resolved? Is there a way to sync root just after the lvm data gets updated in /etc but before the snapshot starts? How else might this be fixed (is it fixed already somewhere)? TIA Ed Tomlinson ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [linux-lvm] [catch22] lvm vs reiserfs 2001-03-22 19:46 [linux-lvm] [catch22] lvm vs reiserfs Ed Tomlinson @ 2001-03-22 20:10 ` Chris Mason 2001-03-22 21:06 ` Ed Tomlinson 0 siblings, 1 reply; 7+ messages in thread From: Chris Mason @ 2001-03-22 20:10 UTC (permalink / raw) To: linux-lvm, reiserfs-list On Thursday, March 22, 2001 02:46:31 PM -0500 Ed Tomlinson <tomlins@cam.org> wrote: > Hi, > > I decided to really try out some of the features built into 2.4. Using a > 2.4.2-ac20 kernel I my root on /dev/lv/root as a reiserfs filesystem. So > far so good. Now I want to back it up. So I created a snapshot with > lvcreate -L 50 -s -n snap /dev/lv/root. This works too. Problem happens > when I want to mount /dev/lv/snap to back it up logically. At this point > reiserfs wants to replay its journal.... Of course it cannot > (snapshot=ro). > > How can this be resolved? Is there a way to sync root just after the lvm > data gets updated in /etc but before the snapshot starts? How else might > this be fixed (is it fixed already somewhere)? Go to ftp.sistina.com, and grab 0.9.1_beta6. Apply linux-2.4.2-VFS-lock.patch that is included in PATCHES directory after untarring. This provides the rest of the lockfs API I coded with the LVM guys. -chris ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [linux-lvm] [catch22] lvm vs reiserfs 2001-03-22 20:10 ` Chris Mason @ 2001-03-22 21:06 ` Ed Tomlinson 2001-03-23 4:33 ` [linux-lvm] " Ed Tomlinson 0 siblings, 1 reply; 7+ messages in thread From: Ed Tomlinson @ 2001-03-22 21:06 UTC (permalink / raw) To: Chris Mason; +Cc: linux-lvm, reiserfs-list On Thursday 22 March 2001 15:10, Chris Mason wrote: > On Thursday, March 22, 2001 02:46:31 PM -0500 Ed Tomlinson > > <tomlins@cam.org> wrote: > > Hi, > > > > I decided to really try out some of the features built into 2.4. Using a > > 2.4.2-ac20 kernel I my root on /dev/lv/root as a reiserfs filesystem. So > > far so good. Now I want to back it up. So I created a snapshot with > > lvcreate -L 50 -s -n snap /dev/lv/root. This works too. Problem happens > > when I want to mount /dev/lv/snap to back it up logically. At this point > > reiserfs wants to replay its journal.... Of course it cannot > > (snapshot=ro). > > > > How can this be resolved? Is there a way to sync root just after the lvm > > data gets updated in /etc but before the snapshot starts? How else might > > this be fixed (is it fixed already somewhere)? > > Go to ftp.sistina.com, and grab 0.9.1_beta6. Apply > linux-2.4.2-VFS-lock.patch that is included in PATCHES directory after > untarring. This provides the rest of the lockfs API I coded with the LVM > guys. I updated to ac21 with the above patch. I am using the lvm utilities from: deb ftp://ftp.sistina.com/pub/LVM/0.9/binaries/debian unstable main Now I can mount the snapshot. Thanks. One loose end, is the journal-1777 message below something to worry about? oscar# lvcreate -L 50 -s -n snap /dev/lv/root lvcreate -- rounding up size to physical extent boundary "52 MB" lvcreate -- WARNING: the snapshot must be disabled if it gets full lvcreate -- INFO: using default snapshot chunk size of 64 KB for "/dev/lv/snap" journal-1777: buffer 16 bad state !PREPARED !LOCKED !DIRTY !JDIRTY_WAIT lvcreate -- doing automatic backup of "lv" lvcreate -- logical volume "/dev/lv/snap" successfully created TIA, Ed Tomlinson ^ permalink raw reply [flat|nested] 7+ messages in thread
* [linux-lvm] Re: [catch22] lvm vs reiserfs 2001-03-22 21:06 ` Ed Tomlinson @ 2001-03-23 4:33 ` Ed Tomlinson 2001-03-23 8:19 ` Luca Berra 2001-03-23 13:10 ` Ed Tomlinson 0 siblings, 2 replies; 7+ messages in thread From: Ed Tomlinson @ 2001-03-23 4:33 UTC (permalink / raw) To: Chris Mason; +Cc: linux-lvm, reiserfs-list On Thursday 22 March 2001 16:06, Ed Tomlinson wrote: Chris et all, Looks like reiserfs snapshots are broken with beta6 and ac22. I had to upgrade to beta6 because of other problems (vgextend caused vgscan to fail...). Now the snapshots are dead again. Note the VFS patch is still applied... oscar# lvcreate -L 1G -s -n snap /dev/lv/root /dev/hda3 lvcreate -- WARNING: the snapshot must be disabled if it gets full lvcreate -- INFO: using default snapshot chunk size of 64 KB for "/dev/lv/snap" lvcreate -- doing automatic backup of "lv" lvcreate -- logical volume "/dev/lv/snap" successfully created oscar# mount /dev/lv/snap /snap -treiserfs -oro reiserfs: checking transaction log (device 3a:04) ... clm-2076: device is readonly, unable to replay log Replay Failure, unable to mount reiserfs_read_super: unable to initialize journal space mount: wrong fs type, bad option, bad superblock on /dev/lv/snap, or too many mounted file systems Ideas? Ed > On Thursday 22 March 2001 15:10, Chris Mason wrote: > > On Thursday, March 22, 2001 02:46:31 PM -0500 Ed Tomlinson > > > > <tomlins@cam.org> wrote: > > > Hi, > > > > > > I decided to really try out some of the features built into 2.4. Using > > > a 2.4.2-ac20 kernel I my root on /dev/lv/root as a reiserfs filesystem. > > > So far so good. Now I want to back it up. So I created a snapshot > > > with lvcreate -L 50 -s -n snap /dev/lv/root. This works too. Problem > > > happens when I want to mount /dev/lv/snap to back it up logically. At > > > this point reiserfs wants to replay its journal.... Of course it > > > cannot > > > (snapshot=ro). > > > > > > How can this be resolved? Is there a way to sync root just after the > > > lvm data gets updated in /etc but before the snapshot starts? How else > > > might this be fixed (is it fixed already somewhere)? > > > > Go to ftp.sistina.com, and grab 0.9.1_beta6. Apply > > linux-2.4.2-VFS-lock.patch that is included in PATCHES directory after > > untarring. This provides the rest of the lockfs API I coded with the LVM > > guys. > > I updated to ac21 with the above patch. I am using the lvm utilities from: > > deb ftp://ftp.sistina.com/pub/LVM/0.9/binaries/debian unstable main > > Now I can mount the snapshot. Thanks. > > One loose end, is the journal-1777 message below something to worry about? > > oscar# lvcreate -L 50 -s -n snap /dev/lv/root > lvcreate -- rounding up size to physical extent boundary "52 MB" > lvcreate -- WARNING: the snapshot must be disabled if it gets full > lvcreate -- INFO: using default snapshot chunk size of 64 KB for > "/dev/lv/snap" journal-1777: buffer 16 bad state !PREPARED !LOCKED !DIRTY > !JDIRTY_WAIT lvcreate -- doing automatic backup of "lv" > lvcreate -- logical volume "/dev/lv/snap" successfully created > > TIA, > Ed Tomlinson ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [linux-lvm] Re: [catch22] lvm vs reiserfs 2001-03-23 4:33 ` [linux-lvm] " Ed Tomlinson @ 2001-03-23 8:19 ` Luca Berra 2001-03-23 8:51 ` josv 2001-03-23 13:10 ` Ed Tomlinson 1 sibling, 1 reply; 7+ messages in thread From: Luca Berra @ 2001-03-23 8:19 UTC (permalink / raw) To: linux-lvm On Thu, Mar 22, 2001 at 11:33:26PM -0500, Ed Tomlinson wrote: > oscar# mount /dev/lv/snap /snap -treiserfs -oro why readonly? > reiserfs: checking transaction log (device 3a:04) ... > clm-2076: device is readonly, unable to replay log > Replay Failure, unable to mount > reiserfs_read_super: unable to initialize journal space > mount: wrong fs type, bad option, bad superblock on /dev/lv/snap, > or too many mounted file systems -- Luca Berra -- bluca@comedia.it Communication Media & Services S.r.l. /"\ \ / ASCII RIBBON CAMPAIGN X AGAINST HTML MAIL / \ ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [linux-lvm] Re: [catch22] lvm vs reiserfs 2001-03-23 8:19 ` Luca Berra @ 2001-03-23 8:51 ` josv 0 siblings, 0 replies; 7+ messages in thread From: josv @ 2001-03-23 8:51 UTC (permalink / raw) To: linux-lvm Snapshots are by their very nature read-only animals. Their internal organisation is such that they can not easily be written to. Mounting it readonly informs the file system of this fact. It seems from the output that the ReiserFS code wants to replay the journal, which leads me to believe that the file system was not properly sync'ed before the snapshot was taken. Maybe the VFS_lock patch needs to be updated? ++Jos On Fri, Mar 23, 2001 at 09:19:53AM +0100, Luca Berra wrote: > On Thu, Mar 22, 2001 at 11:33:26PM -0500, Ed Tomlinson wrote: > > oscar# mount /dev/lv/snap /snap -treiserfs -oro > why readonly? > > > reiserfs: checking transaction log (device 3a:04) ... > > clm-2076: device is readonly, unable to replay log > > Replay Failure, unable to mount > > reiserfs_read_super: unable to initialize journal space > > mount: wrong fs type, bad option, bad superblock on /dev/lv/snap, > > or too many mounted file systems > > -- > Luca Berra -- bluca@comedia.it > Communication Media & Services S.r.l. > /"\ > \ / ASCII RIBBON CAMPAIGN > X AGAINST HTML MAIL > / \ > _______________________________________________ > linux-lvm mailing list > linux-lvm@sistina.com > http://lists.sistina.com/mailman/listinfo/linux-lvm ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [linux-lvm] Re: [catch22] lvm vs reiserfs 2001-03-23 4:33 ` [linux-lvm] " Ed Tomlinson 2001-03-23 8:19 ` Luca Berra @ 2001-03-23 13:10 ` Ed Tomlinson 1 sibling, 0 replies; 7+ messages in thread From: Ed Tomlinson @ 2001-03-23 13:10 UTC (permalink / raw) To: Chris Mason; +Cc: linux-lvm, reiserfs-list On Thursday 22 March 2001 23:33, Ed Tomlinson wrote: Hi, Looks like the generated lvm patch stomps all over the VFS locking stuff... Guess the correct procedure is -R VFS, patch lvm, patch VFS. Will test tonight Ed > On Thursday 22 March 2001 16:06, Ed Tomlinson wrote: > > Chris et all, > > Looks like reiserfs snapshots are broken with beta6 and ac22. > I had to upgrade to beta6 because of other problems (vgextend > caused vgscan to fail...). Now the snapshots are dead again. > Note the VFS patch is still applied... > > oscar# lvcreate -L 1G -s -n snap /dev/lv/root /dev/hda3 > lvcreate -- WARNING: the snapshot must be disabled if it gets full > lvcreate -- INFO: using default snapshot chunk size of 64 KB for > "/dev/lv/snap" lvcreate -- doing automatic backup of "lv" > lvcreate -- logical volume "/dev/lv/snap" successfully created > > oscar# mount /dev/lv/snap /snap -treiserfs -oro > reiserfs: checking transaction log (device 3a:04) ... > clm-2076: device is readonly, unable to replay log > Replay Failure, unable to mount > reiserfs_read_super: unable to initialize journal space > mount: wrong fs type, bad option, bad superblock on /dev/lv/snap, > or too many mounted file systems > > Ideas? > Ed > > > On Thursday 22 March 2001 15:10, Chris Mason wrote: > > > On Thursday, March 22, 2001 02:46:31 PM -0500 Ed Tomlinson > > > > > > <tomlins@cam.org> wrote: > > > > Hi, > > > > > > > > I decided to really try out some of the features built into 2.4. > > > > Using a 2.4.2-ac20 kernel I my root on /dev/lv/root as a reiserfs > > > > filesystem. So far so good. Now I want to back it up. So I created > > > > a snapshot with lvcreate -L 50 -s -n snap /dev/lv/root. This works > > > > too. Problem happens when I want to mount /dev/lv/snap to back it up > > > > logically. At this point reiserfs wants to replay its journal.... > > > > Of course it cannot > > > > (snapshot=ro). > > > > > > > > How can this be resolved? Is there a way to sync root just after the > > > > lvm data gets updated in /etc but before the snapshot starts? How > > > > else might this be fixed (is it fixed already somewhere)? > > > > > > Go to ftp.sistina.com, and grab 0.9.1_beta6. Apply > > > linux-2.4.2-VFS-lock.patch that is included in PATCHES directory after > > > untarring. This provides the rest of the lockfs API I coded with the > > > LVM guys. > > > > I updated to ac21 with the above patch. I am using the lvm utilities > > from: > > > > deb ftp://ftp.sistina.com/pub/LVM/0.9/binaries/debian unstable main > > > > Now I can mount the snapshot. Thanks. > > > > One loose end, is the journal-1777 message below something to worry > > about? > > > > oscar# lvcreate -L 50 -s -n snap /dev/lv/root > > lvcreate -- rounding up size to physical extent boundary "52 MB" > > lvcreate -- WARNING: the snapshot must be disabled if it gets full > > lvcreate -- INFO: using default snapshot chunk size of 64 KB for > > "/dev/lv/snap" journal-1777: buffer 16 bad state !PREPARED !LOCKED !DIRTY > > !JDIRTY_WAIT lvcreate -- doing automatic backup of "lv" > > lvcreate -- logical volume "/dev/lv/snap" successfully created > > > > TIA, > > Ed Tomlinson > > _______________________________________________ > linux-lvm mailing list > linux-lvm@sistina.com > http://lists.sistina.com/mailman/listinfo/linux-lvm ^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2001-03-23 13:10 UTC | newest] Thread overview: 7+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2001-03-22 19:46 [linux-lvm] [catch22] lvm vs reiserfs Ed Tomlinson 2001-03-22 20:10 ` Chris Mason 2001-03-22 21:06 ` Ed Tomlinson 2001-03-23 4:33 ` [linux-lvm] " Ed Tomlinson 2001-03-23 8:19 ` Luca Berra 2001-03-23 8:51 ` josv 2001-03-23 13:10 ` Ed Tomlinson
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