Discussion:
Zfs-fuse: Mount is off but it wont mont to my mount point.
(too old to reply)
Lachlan Holmes
2012-09-10 11:04:48 UTC
Permalink
Hey Guys,

I can't access my data anymore.

ZFS-Fuse mounts my pool called "storage" but after a reboot the pool no
longer mounts to m=/storage


# sudo zfs get all storage
NAME PROPERTY VALUE SOURCE
storage type filesystem -
storage creation Wed Dec 14 9:15 2011 -
storage used 4.16T -
storage available 1.16T -
storage referenced 4.16T -
storage compressratio 1.00x -
storage mounted no -
storage quota none default
storage reservation none default
storage recordsize 128K default
storage mountpoint /storage local
storage sharenfs off default
storage checksum on default
storage compression off default
storage atime on default
storage devices on default
storage exec on default
storage setuid on default
storage readonly off default
storage zoned off default
storage snapdir hidden default
storage aclmode groupmask default
storage aclinherit restricted default
storage canmount on default
storage xattr on default
storage copies 1 default
storage version 4 -
storage utf8only off -
storage normalization none -
storage casesensitivity sensitive -
storage vscan off default
storage nbmand off default
storage sharesmb off default
storage refquota none default
storage refreservation none default
storage primarycache all default
storage secondarycache all default
storage usedbysnapshots 0 -
storage usedbydataset 4.16T -
storage usedbychildren 1.17G -
storage usedbyrefreservation 0 -
storage logbias latency default
storage dedup on local
storage mlslabel on -

When i do a sudo zfs mount i get the following.

cannot mount 'storage': mountpoint or dataset is busy

This is history of the pool.

History for 'storage':
2011-12-14.09:15:17 zpool create storage -m /storage raidz2
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30PHJED
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30RUXLD
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30RW2LD
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30SAHAD
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30SAT8D spare
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F32M0J1D -f
2012-02-06.19:55:54 zpool scrub -s storage
2012-02-06.19:56:21 zpool scrub -s storage
2012-03-07.21:56:08 zpool scrub -s storage
2012-04-15.08:08:46 zpool scrub -s storage
2012-04-15.08:08:49 zpool scrub -s storage
2012-05-31.20:03:45 zpool scrub -s storage
2012-05-31.20:03:47 zpool scrub -s storage
2012-08-04.18:16:02 zpool scrub storage
2012-08-08.18:36:26 zpool scrub storage
2012-08-11.09:47:00 zpool scrub storage
2012-09-05.18:27:27 zpool scrub storage
2012-09-05.18:34:00 zfs set dedup=on storage


can anyone explain why the mounted is set to no and then i can't mount it?
or should i give up?


regards
lachlan
--
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Emmanuel Anne
2012-09-10 11:29:58 UTC
Permalink
Did you check that /storage is empty ?
(enabling dedup after some files were written to the fs is most of the time
a bad idea, dedup requires a lot of metadata and slows things a lot
usually, it's better to have specialized filesystems for this).
Post by Lachlan Holmes
Hey Guys,
I can't access my data anymore.
ZFS-Fuse mounts my pool called "storage" but after a reboot the pool no
longer mounts to m=/storage
# sudo zfs get all storage
NAME PROPERTY VALUE SOURCE
storage type filesystem -
storage creation Wed Dec 14 9:15 2011 -
storage used 4.16T -
storage available 1.16T -
storage referenced 4.16T -
storage compressratio 1.00x -
storage mounted no -
storage quota none default
storage reservation none default
storage recordsize 128K default
storage mountpoint /storage local
storage sharenfs off default
storage checksum on default
storage compression off default
storage atime on default
storage devices on default
storage exec on default
storage setuid on default
storage readonly off default
storage zoned off default
storage snapdir hidden default
storage aclmode groupmask default
storage aclinherit restricted default
storage canmount on default
storage xattr on default
storage copies 1 default
storage version 4 -
storage utf8only off -
storage normalization none -
storage casesensitivity sensitive -
storage vscan off default
storage nbmand off default
storage sharesmb off default
storage refquota none default
storage refreservation none default
storage primarycache all default
storage secondarycache all default
storage usedbysnapshots 0 -
storage usedbydataset 4.16T -
storage usedbychildren 1.17G -
storage usedbyrefreservation 0 -
storage logbias latency default
storage dedup on local
storage mlslabel on -
When i do a sudo zfs mount i get the following.
cannot mount 'storage': mountpoint or dataset is busy
This is history of the pool.
2011-12-14.09:15:17 zpool create storage -m /storage raidz2
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30PHJED
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30RUXLD
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30RW2LD
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30SAHAD
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30SAT8D spare
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F32M0J1D -f
2012-02-06.19:55:54 zpool scrub -s storage
2012-02-06.19:56:21 zpool scrub -s storage
2012-03-07.21:56:08 zpool scrub -s storage
2012-04-15.08:08:46 zpool scrub -s storage
2012-04-15.08:08:49 zpool scrub -s storage
2012-05-31.20:03:45 zpool scrub -s storage
2012-05-31.20:03:47 zpool scrub -s storage
2012-08-04.18:16:02 zpool scrub storage
2012-08-08.18:36:26 zpool scrub storage
2012-08-11.09:47:00 zpool scrub storage
2012-09-05.18:27:27 zpool scrub storage
2012-09-05.18:34:00 zfs set dedup=on storage
can anyone explain why the mounted is set to no and then i can't mount it?
or should i give up?
regards
lachlan
--
To visit our Web site, click on http://zfs-fuse.net/
--
my zfs-fuse git repository :
http://rainemu.swishparty.co.uk/cgi-bin/gitweb.cgi?p=zfs;a=summary
--
To post to this group, send email to zfs-fuse-/***@public.gmane.org
To visit our Web site, click on http://zfs-fuse.net/
Lachlan Holmes
2012-09-10 11:49:56 UTC
Permalink
Hey mate yes the /storage folder is empty...

but the folder in question shows this. which is to say that the /storage
folder doesnt seem to me associated to the zfs pool
# sudo df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sdg7 37G 3.7G 32G 11% /
none 1.9G 264K 1.9G 1% /dev
none 1.9G 176K 1.9G 1% /dev/shm
none 1.9G 328K 1.9G 1% /var/run
none 1.9G 0 1.9G 0% /var/lock
/dev/sdg5 92M 63M 24M 73% /boot
/dev/sdg6 30G 1.3G 27G 5% /home


# sudo zpool list
NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT
storage 9.06T 6.97T 2.09T 76% 1.01x ONLINE -
# sudo zfs list
NAME USED AVAIL REFER MOUNTPOINT
storage 4.15T 1.17T 4.15T /storage

if this doesnt help let me know what i need to do. I still feel like the
data is there fro mthe zfs list but its not working.

regards,
lachlan
Post by Emmanuel Anne
Did you check that /storage is empty ?
(enabling dedup after some files were written to the fs is most of the
time a bad idea, dedup requires a lot of metadata and slows things a lot
usually, it's better to have specialized filesystems for this).
Post by Lachlan Holmes
Hey Guys,
I can't access my data anymore.
ZFS-Fuse mounts my pool called "storage" but after a reboot the pool no
longer mounts to m=/storage
# sudo zfs get all storage
NAME PROPERTY VALUE SOURCE
storage type filesystem -
storage creation Wed Dec 14 9:15 2011 -
storage used 4.16T -
storage available 1.16T -
storage referenced 4.16T -
storage compressratio 1.00x -
storage mounted no -
storage quota none default
storage reservation none default
storage recordsize 128K default
storage mountpoint /storage local
storage sharenfs off default
storage checksum on default
storage compression off default
storage atime on default
storage devices on default
storage exec on default
storage setuid on default
storage readonly off default
storage zoned off default
storage snapdir hidden default
storage aclmode groupmask default
storage aclinherit restricted default
storage canmount on default
storage xattr on default
storage copies 1 default
storage version 4 -
storage utf8only off -
storage normalization none -
storage casesensitivity sensitive -
storage vscan off default
storage nbmand off default
storage sharesmb off default
storage refquota none default
storage refreservation none default
storage primarycache all default
storage secondarycache all default
storage usedbysnapshots 0 -
storage usedbydataset 4.16T -
storage usedbychildren 1.17G -
storage usedbyrefreservation 0 -
storage logbias latency default
storage dedup on local
storage mlslabel on -
When i do a sudo zfs mount i get the following.
cannot mount 'storage': mountpoint or dataset is busy
This is history of the pool.
2011-12-14.09:15:17 zpool create storage -m /storage raidz2
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30PHJED
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30RUXLD
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30RW2LD
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30SAHAD
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30SAT8D spare
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F32M0J1D -f
2012-02-06.19:55:54 zpool scrub -s storage
2012-02-06.19:56:21 zpool scrub -s storage
2012-03-07.21:56:08 zpool scrub -s storage
2012-04-15.08:08:46 zpool scrub -s storage
2012-04-15.08:08:49 zpool scrub -s storage
2012-05-31.20:03:45 zpool scrub -s storage
2012-05-31.20:03:47 zpool scrub -s storage
2012-08-04.18:16:02 zpool scrub storage
2012-08-08.18:36:26 zpool scrub storage
2012-08-11.09:47:00 zpool scrub storage
2012-09-05.18:27:27 zpool scrub storage
2012-09-05.18:34:00 zfs set dedup=on storage
can anyone explain why the mounted is set to no and then i can't mount
it? or should i give up?
regards
lachlan
--
To visit our Web site, click on http://zfs-fuse.net/
--
http://rainemu.swishparty.co.uk/cgi-bin/gitweb.cgi?p=zfs;a=summary
--
To post to this group, send email to zfs-fuse-/***@public.gmane.org
To visit our Web site, click on http://zfs-fuse.net/
Emmanuel Anne
2012-09-10 12:14:43 UTC
Permalink
So you are saying that zfs thinks /storage is mounted, but your os doesn't ?
Well then just try sudo zfs umount storage followed by sudo zfs mount
storage, and see what happens... !
Post by Lachlan Holmes
Hey mate yes the /storage folder is empty...
but the folder in question shows this. which is to say that the /storage
folder doesnt seem to me associated to the zfs pool
# sudo df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sdg7 37G 3.7G 32G 11% /
none 1.9G 264K 1.9G 1% /dev
none 1.9G 176K 1.9G 1% /dev/shm
none 1.9G 328K 1.9G 1% /var/run
none 1.9G 0 1.9G 0% /var/lock
/dev/sdg5 92M 63M 24M 73% /boot
/dev/sdg6 30G 1.3G 27G 5% /home
# sudo zpool list
NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT
storage 9.06T 6.97T 2.09T 76% 1.01x ONLINE -
# sudo zfs list
NAME USED AVAIL REFER MOUNTPOINT
storage 4.15T 1.17T 4.15T /storage
if this doesnt help let me know what i need to do. I still feel like the
data is there fro mthe zfs list but its not working.
regards,
lachlan
Post by Emmanuel Anne
Did you check that /storage is empty ?
(enabling dedup after some files were written to the fs is most of the
time a bad idea, dedup requires a lot of metadata and slows things a lot
usually, it's better to have specialized filesystems for this).
Post by Lachlan Holmes
Hey Guys,
I can't access my data anymore.
ZFS-Fuse mounts my pool called "storage" but after a reboot the pool no
longer mounts to m=/storage
# sudo zfs get all storage
NAME PROPERTY VALUE SOURCE
storage type filesystem -
storage creation Wed Dec 14 9:15 2011 -
storage used 4.16T -
storage available 1.16T -
storage referenced 4.16T -
storage compressratio 1.00x -
storage mounted no -
storage quota none default
storage reservation none default
storage recordsize 128K default
storage mountpoint /storage local
storage sharenfs off default
storage checksum on default
storage compression off default
storage atime on default
storage devices on default
storage exec on default
storage setuid on default
storage readonly off default
storage zoned off default
storage snapdir hidden default
storage aclmode groupmask default
storage aclinherit restricted default
storage canmount on default
storage xattr on default
storage copies 1 default
storage version 4 -
storage utf8only off -
storage normalization none -
storage casesensitivity sensitive -
storage vscan off default
storage nbmand off default
storage sharesmb off default
storage refquota none default
storage refreservation none default
storage primarycache all default
storage secondarycache all default
storage usedbysnapshots 0 -
storage usedbydataset 4.16T -
storage usedbychildren 1.17G -
storage usedbyrefreservation 0 -
storage logbias latency default
storage dedup on local
storage mlslabel on -
When i do a sudo zfs mount i get the following.
cannot mount 'storage': mountpoint or dataset is busy
This is history of the pool.
2011-12-14.09:15:17 zpool create storage -m /storage raidz2
disk/by-id/scsi-SATA_Hitachi_**HDS7230_MN1220F30PHJED
disk/by-id/scsi-SATA_Hitachi_**HDS7230_MN1220F30RUXLD
disk/by-id/scsi-SATA_Hitachi_**HDS7230_MN1220F30RW2LD
disk/by-id/scsi-SATA_Hitachi_**HDS7230_MN1220F30SAHAD
disk/by-id/scsi-SATA_Hitachi_**HDS7230_MN1220F30SAT8D spare
disk/by-id/scsi-SATA_Hitachi_**HDS7230_MN1220F32M0J1D -f
2012-02-06.19:55:54 zpool scrub -s storage
2012-02-06.19:56:21 zpool scrub -s storage
2012-03-07.21:56:08 zpool scrub -s storage
2012-04-15.08:08:46 zpool scrub -s storage
2012-04-15.08:08:49 zpool scrub -s storage
2012-05-31.20:03:45 zpool scrub -s storage
2012-05-31.20:03:47 zpool scrub -s storage
2012-08-04.18:16:02 zpool scrub storage
2012-08-08.18:36:26 zpool scrub storage
2012-08-11.09:47:00 zpool scrub storage
2012-09-05.18:27:27 zpool scrub storage
2012-09-05.18:34:00 zfs set dedup=on storage
can anyone explain why the mounted is set to no and then i can't mount
it? or should i give up?
regards
lachlan
--
To visit our Web site, click on http://zfs-fuse.net/
--
my zfs-fuse git repository : http://rainemu.swishparty.co.**
uk/cgi-bin/gitweb.cgi?p=zfs;a=**summary<http://rainemu.swishparty.co.uk/cgi-bin/gitweb.cgi?p=zfs;a=summary>
--
To visit our Web site, click on http://zfs-fuse.net/
--
my zfs-fuse git repository :
http://rainemu.swishparty.co.uk/cgi-bin/gitweb.cgi?p=zfs;a=summary
--
To post to this group, send email to zfs-fuse-/***@public.gmane.org
To visit our Web site, click on http://zfs-fuse.net/
Lachlan Holmes
2012-09-10 12:25:47 UTC
Permalink
lachlan@#########:~$ sudo zfs umount storage
[sudo] password for lachlan:
cannot unmount 'storage': not currently mounted
lachlan@#########:~$ sudo zfs mount storage
cannot mount 'storage': mountpoint or dataset is busy

so yeah i dont know what to do here.

regards,
lachlan
Post by Emmanuel Anne
So you are saying that zfs thinks /storage is mounted, but your os doesn't ?
Well then just try sudo zfs umount storage followed by sudo zfs mount
storage, and see what happens... !
Post by Lachlan Holmes
Hey mate yes the /storage folder is empty...
but the folder in question shows this. which is to say that the /storage
folder doesnt seem to me associated to the zfs pool
# sudo df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sdg7 37G 3.7G 32G 11% /
none 1.9G 264K 1.9G 1% /dev
none 1.9G 176K 1.9G 1% /dev/shm
none 1.9G 328K 1.9G 1% /var/run
none 1.9G 0 1.9G 0% /var/lock
/dev/sdg5 92M 63M 24M 73% /boot
/dev/sdg6 30G 1.3G 27G 5% /home
# sudo zpool list
NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT
storage 9.06T 6.97T 2.09T 76% 1.01x ONLINE -
# sudo zfs list
NAME USED AVAIL REFER MOUNTPOINT
storage 4.15T 1.17T 4.15T /storage
if this doesnt help let me know what i need to do. I still feel like the
data is there fro mthe zfs list but its not working.
regards,
lachlan
Post by Emmanuel Anne
Did you check that /storage is empty ?
(enabling dedup after some files were written to the fs is most of the
time a bad idea, dedup requires a lot of metadata and slows things a lot
usually, it's better to have specialized filesystems for this).
Post by Lachlan Holmes
Hey Guys,
I can't access my data anymore.
ZFS-Fuse mounts my pool called "storage" but after a reboot the pool no
longer mounts to m=/storage
# sudo zfs get all storage
NAME PROPERTY VALUE SOURCE
storage type filesystem -
storage creation Wed Dec 14 9:15 2011 -
storage used 4.16T -
storage available 1.16T -
storage referenced 4.16T -
storage compressratio 1.00x -
storage mounted no -
storage quota none default
storage reservation none default
storage recordsize 128K default
storage mountpoint /storage local
storage sharenfs off default
storage checksum on default
storage compression off default
storage atime on default
storage devices on default
storage exec on default
storage setuid on default
storage readonly off default
storage zoned off default
storage snapdir hidden default
storage aclmode groupmask default
storage aclinherit restricted default
storage canmount on default
storage xattr on default
storage copies 1 default
storage version 4 -
storage utf8only off -
storage normalization none -
storage casesensitivity sensitive -
storage vscan off default
storage nbmand off default
storage sharesmb off default
storage refquota none default
storage refreservation none default
storage primarycache all default
storage secondarycache all default
storage usedbysnapshots 0 -
storage usedbydataset 4.16T -
storage usedbychildren 1.17G -
storage usedbyrefreservation 0 -
storage logbias latency default
storage dedup on local
storage mlslabel on -
When i do a sudo zfs mount i get the following.
cannot mount 'storage': mountpoint or dataset is busy
This is history of the pool.
2011-12-14.09:15:17 zpool create storage -m /storage raidz2
disk/by-id/scsi-SATA_Hitachi_**HDS7230_MN1220F30PHJED
disk/by-id/scsi-SATA_Hitachi_**HDS7230_MN1220F30RUXLD
disk/by-id/scsi-SATA_Hitachi_**HDS7230_MN1220F30RW2LD
disk/by-id/scsi-SATA_Hitachi_**HDS7230_MN1220F30SAHAD
disk/by-id/scsi-SATA_Hitachi_**HDS7230_MN1220F30SAT8D spare
disk/by-id/scsi-SATA_Hitachi_**HDS7230_MN1220F32M0J1D -f
2012-02-06.19:55:54 zpool scrub -s storage
2012-02-06.19:56:21 zpool scrub -s storage
2012-03-07.21:56:08 zpool scrub -s storage
2012-04-15.08:08:46 zpool scrub -s storage
2012-04-15.08:08:49 zpool scrub -s storage
2012-05-31.20:03:45 zpool scrub -s storage
2012-05-31.20:03:47 zpool scrub -s storage
2012-08-04.18:16:02 zpool scrub storage
2012-08-08.18:36:26 zpool scrub storage
2012-08-11.09:47:00 zpool scrub storage
2012-09-05.18:27:27 zpool scrub storage
2012-09-05.18:34:00 zfs set dedup=on storage
can anyone explain why the mounted is set to no and then i can't mount
it? or should i give up?
regards
lachlan
--
To visit our Web site, click on http://zfs-fuse.net/
--
my zfs-fuse git repository : http://rainemu.swishparty.co.**
uk/cgi-bin/gitweb.cgi?p=zfs;a=**summary<http://rainemu.swishparty.co.uk/cgi-bin/gitweb.cgi?p=zfs;a=summary>
--
To visit our Web site, click on http://zfs-fuse.net/
--
http://rainemu.swishparty.co.uk/cgi-bin/gitweb.cgi?p=zfs;a=summary
--
To post to this group, send email to zfs-fuse-/***@public.gmane.org
To visit our Web site, click on http://zfs-fuse.net/
sehe
2012-09-10 12:36:37 UTC
Permalink
This problem started immediately after enabling dedup?

Dedup eats a lot of RAM.

Can you try to give zfs-fuse a lot more RAM? Use swap if you have to... I
know that's not workable but you can at least see whether it will load your
dataset if it can use more RAM for DDT

$0.02
Post by Lachlan Holmes
Hey Guys,
I can't access my data anymore.
ZFS-Fuse mounts my pool called "storage" but after a reboot the pool no
longer mounts to m=/storage
# sudo zfs get all storage
NAME PROPERTY VALUE SOURCE
storage type filesystem -
storage creation Wed Dec 14 9:15 2011 -
storage used 4.16T -
storage available 1.16T -
storage referenced 4.16T -
storage compressratio 1.00x -
storage mounted no -
storage quota none default
storage reservation none default
storage recordsize 128K default
storage mountpoint /storage local
storage sharenfs off default
storage checksum on default
storage compression off default
storage atime on default
storage devices on default
storage exec on default
storage setuid on default
storage readonly off default
storage zoned off default
storage snapdir hidden default
storage aclmode groupmask default
storage aclinherit restricted default
storage canmount on default
storage xattr on default
storage copies 1 default
storage version 4 -
storage utf8only off -
storage normalization none -
storage casesensitivity sensitive -
storage vscan off default
storage nbmand off default
storage sharesmb off default
storage refquota none default
storage refreservation none default
storage primarycache all default
storage secondarycache all default
storage usedbysnapshots 0 -
storage usedbydataset 4.16T -
storage usedbychildren 1.17G -
storage usedbyrefreservation 0 -
storage logbias latency default
storage dedup on local
storage mlslabel on -
When i do a sudo zfs mount i get the following.
cannot mount 'storage': mountpoint or dataset is busy
This is history of the pool.
2011-12-14.09:15:17 zpool create storage -m /storage raidz2
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30PHJED
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30RUXLD
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30RW2LD
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30SAHAD
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30SAT8D spare
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F32M0J1D -f
2012-02-06.19:55:54 zpool scrub -s storage
2012-02-06.19:56:21 zpool scrub -s storage
2012-03-07.21:56:08 zpool scrub -s storage
2012-04-15.08:08:46 zpool scrub -s storage
2012-04-15.08:08:49 zpool scrub -s storage
2012-05-31.20:03:45 zpool scrub -s storage
2012-05-31.20:03:47 zpool scrub -s storage
2012-08-04.18:16:02 zpool scrub storage
2012-08-08.18:36:26 zpool scrub storage
2012-08-11.09:47:00 zpool scrub storage
2012-09-05.18:27:27 zpool scrub storage
2012-09-05.18:34:00 zfs set dedup=on storage
can anyone explain why the mounted is set to no and then i can't mount it?
or should i give up?
regards
lachlan
--
To post to this group, send email to zfs-fuse-/***@public.gmane.org
To visit our Web site, click on http://zfs-fuse.net/
Emmanuel Anne
2012-09-10 12:40:40 UTC
Permalink
Or easier, just disable dedup to test, if it works then you can always
change your settings if you really want to enable it after that.
Post by sehe
This problem started immediately after enabling dedup?
Dedup eats a lot of RAM.
Can you try to give zfs-fuse a lot more RAM? Use swap if you have to... I
know that's not workable but you can at least see whether it will load your
dataset if it can use more RAM for DDT
$0.02
Post by Lachlan Holmes
Hey Guys,
I can't access my data anymore.
ZFS-Fuse mounts my pool called "storage" but after a reboot the pool no
longer mounts to m=/storage
# sudo zfs get all storage
NAME PROPERTY VALUE SOURCE
storage type filesystem -
storage creation Wed Dec 14 9:15 2011 -
storage used 4.16T -
storage available 1.16T -
storage referenced 4.16T -
storage compressratio 1.00x -
storage mounted no -
storage quota none default
storage reservation none default
storage recordsize 128K default
storage mountpoint /storage local
storage sharenfs off default
storage checksum on default
storage compression off default
storage atime on default
storage devices on default
storage exec on default
storage setuid on default
storage readonly off default
storage zoned off default
storage snapdir hidden default
storage aclmode groupmask default
storage aclinherit restricted default
storage canmount on default
storage xattr on default
storage copies 1 default
storage version 4 -
storage utf8only off -
storage normalization none -
storage casesensitivity sensitive -
storage vscan off default
storage nbmand off default
storage sharesmb off default
storage refquota none default
storage refreservation none default
storage primarycache all default
storage secondarycache all default
storage usedbysnapshots 0 -
storage usedbydataset 4.16T -
storage usedbychildren 1.17G -
storage usedbyrefreservation 0 -
storage logbias latency default
storage dedup on local
storage mlslabel on -
When i do a sudo zfs mount i get the following.
cannot mount 'storage': mountpoint or dataset is busy
This is history of the pool.
2011-12-14.09:15:17 zpool create storage -m /storage raidz2
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30PHJED
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30RUXLD
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30RW2LD
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30SAHAD
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30SAT8D spare
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F32M0J1D -f
2012-02-06.19:55:54 zpool scrub -s storage
2012-02-06.19:56:21 zpool scrub -s storage
2012-03-07.21:56:08 zpool scrub -s storage
2012-04-15.08:08:46 zpool scrub -s storage
2012-04-15.08:08:49 zpool scrub -s storage
2012-05-31.20:03:45 zpool scrub -s storage
2012-05-31.20:03:47 zpool scrub -s storage
2012-08-04.18:16:02 zpool scrub storage
2012-08-08.18:36:26 zpool scrub storage
2012-08-11.09:47:00 zpool scrub storage
2012-09-05.18:27:27 zpool scrub storage
2012-09-05.18:34:00 zfs set dedup=on storage
can anyone explain why the mounted is set to no and then i can't mount
it? or should i give up?
regards
lachlan
--
To visit our Web site, click on http://zfs-fuse.net/
--
my zfs-fuse git repository :
http://rainemu.swishparty.co.uk/cgi-bin/gitweb.cgi?p=zfs;a=summary
--
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Lachlan Holmes
2012-09-10 12:47:13 UTC
Permalink
lachlan@#######:~$ sudo zpool set dedup=off storage
cannot set property for 'storage': 'dedup' is readonly

am I doing it right? Thanks Lachlan
Post by Emmanuel Anne
Or easier, just disable dedup to test, if it works then you can always
change your settings if you really want to enable it after that.
Post by sehe
This problem started immediately after enabling dedup?
Dedup eats a lot of RAM.
Can you try to give zfs-fuse a lot more RAM? Use swap if you have to... I
know that's not workable but you can at least see whether it will load your
dataset if it can use more RAM for DDT
$0.02
Post by Lachlan Holmes
Hey Guys,
I can't access my data anymore.
ZFS-Fuse mounts my pool called "storage" but after a reboot the pool no
longer mounts to m=/storage
# sudo zfs get all storage
NAME PROPERTY VALUE SOURCE
storage type filesystem -
storage creation Wed Dec 14 9:15 2011 -
storage used 4.16T -
storage available 1.16T -
storage referenced 4.16T -
storage compressratio 1.00x -
storage mounted no -
storage quota none default
storage reservation none default
storage recordsize 128K default
storage mountpoint /storage local
storage sharenfs off default
storage checksum on default
storage compression off default
storage atime on default
storage devices on default
storage exec on default
storage setuid on default
storage readonly off default
storage zoned off default
storage snapdir hidden default
storage aclmode groupmask default
storage aclinherit restricted default
storage canmount on default
storage xattr on default
storage copies 1 default
storage version 4 -
storage utf8only off -
storage normalization none -
storage casesensitivity sensitive -
storage vscan off default
storage nbmand off default
storage sharesmb off default
storage refquota none default
storage refreservation none default
storage primarycache all default
storage secondarycache all default
storage usedbysnapshots 0 -
storage usedbydataset 4.16T -
storage usedbychildren 1.17G -
storage usedbyrefreservation 0 -
storage logbias latency default
storage dedup on local
storage mlslabel on -
When i do a sudo zfs mount i get the following.
cannot mount 'storage': mountpoint or dataset is busy
This is history of the pool.
2011-12-14.09:15:17 zpool create storage -m /storage raidz2
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30PHJED
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30RUXLD
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30RW2LD
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30SAHAD
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30SAT8D spare
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F32M0J1D -f
2012-02-06.19:55:54 zpool scrub -s storage
2012-02-06.19:56:21 zpool scrub -s storage
2012-03-07.21:56:08 zpool scrub -s storage
2012-04-15.08:08:46 zpool scrub -s storage
2012-04-15.08:08:49 zpool scrub -s storage
2012-05-31.20:03:45 zpool scrub -s storage
2012-05-31.20:03:47 zpool scrub -s storage
2012-08-04.18:16:02 zpool scrub storage
2012-08-08.18:36:26 zpool scrub storage
2012-08-11.09:47:00 zpool scrub storage
2012-09-05.18:27:27 zpool scrub storage
2012-09-05.18:34:00 zfs set dedup=on storage
can anyone explain why the mounted is set to no and then i can't mount
it? or should i give up?
regards
lachlan
--
To visit our Web site, click on http://zfs-fuse.net/
--
http://rainemu.swishparty.co.uk/cgi-bin/gitweb.cgi?p=zfs;a=summary
--
To visit our Web site, click on http://zfs-fuse.net/
--
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Emmanuel Anne
2012-09-10 16:40:45 UTC
Permalink
Find some documentation about dedup, it will obviously be useful, it's not
an option you can use without first learning a lot of things !
Post by Lachlan Holmes
cannot set property for 'storage': 'dedup' is readonly
am I doing it right? Thanks Lachlan
Post by Emmanuel Anne
Or easier, just disable dedup to test, if it works then you can always
change your settings if you really want to enable it after that.
Post by sehe
This problem started immediately after enabling dedup?
Dedup eats a lot of RAM.
Can you try to give zfs-fuse a lot more RAM? Use swap if you have to...
I know that's not workable but you can at least see whether it will load
your dataset if it can use more RAM for DDT
$0.02
Post by Lachlan Holmes
Hey Guys,
I can't access my data anymore.
ZFS-Fuse mounts my pool called "storage" but after a reboot the pool no
longer mounts to m=/storage
# sudo zfs get all storage
NAME PROPERTY VALUE SOURCE
storage type filesystem -
storage creation Wed Dec 14 9:15 2011 -
storage used 4.16T -
storage available 1.16T -
storage referenced 4.16T -
storage compressratio 1.00x -
storage mounted no -
storage quota none default
storage reservation none default
storage recordsize 128K default
storage mountpoint /storage local
storage sharenfs off default
storage checksum on default
storage compression off default
storage atime on default
storage devices on default
storage exec on default
storage setuid on default
storage readonly off default
storage zoned off default
storage snapdir hidden default
storage aclmode groupmask default
storage aclinherit restricted default
storage canmount on default
storage xattr on default
storage copies 1 default
storage version 4 -
storage utf8only off -
storage normalization none -
storage casesensitivity sensitive -
storage vscan off default
storage nbmand off default
storage sharesmb off default
storage refquota none default
storage refreservation none default
storage primarycache all default
storage secondarycache all default
storage usedbysnapshots 0 -
storage usedbydataset 4.16T -
storage usedbychildren 1.17G -
storage usedbyrefreservation 0 -
storage logbias latency default
storage dedup on local
storage mlslabel on -
When i do a sudo zfs mount i get the following.
cannot mount 'storage': mountpoint or dataset is busy
This is history of the pool.
2011-12-14.09:15:17 zpool create storage -m /storage raidz2
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30PHJED
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30RUXLD
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30RW2LD
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30SAHAD
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30SAT8D spare
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F32M0J1D -f
2012-02-06.19:55:54 zpool scrub -s storage
2012-02-06.19:56:21 zpool scrub -s storage
2012-03-07.21:56:08 zpool scrub -s storage
2012-04-15.08:08:46 zpool scrub -s storage
2012-04-15.08:08:49 zpool scrub -s storage
2012-05-31.20:03:45 zpool scrub -s storage
2012-05-31.20:03:47 zpool scrub -s storage
2012-08-04.18:16:02 zpool scrub storage
2012-08-08.18:36:26 zpool scrub storage
2012-08-11.09:47:00 zpool scrub storage
2012-09-05.18:27:27 zpool scrub storage
2012-09-05.18:34:00 zfs set dedup=on storage
can anyone explain why the mounted is set to no and then i can't mount
it? or should i give up?
regards
lachlan
--
To visit our Web site, click on http://zfs-fuse.net/
--
http://rainemu.swishparty.co.uk/cgi-bin/gitweb.cgi?p=zfs;a=summary
--
To visit our Web site, click on http://zfs-fuse.net/
--
To visit our Web site, click on http://zfs-fuse.net/
--
my zfs-fuse git repository :
http://rainemu.swishparty.co.uk/cgi-bin/gitweb.cgi?p=zfs;a=summary
--
To post to this group, send email to zfs-fuse-/***@public.gmane.org
To visit our Web site, click on http://zfs-fuse.net/
sehe
2012-09-10 22:27:08 UTC
Permalink
That won't work. Once the DDT tables are there, they'll have to be loaded
even after you disable dedup. A pool with dedup **ever** enabled will
always stay dedup-enabled on the storage level.
Post by Emmanuel Anne
Or easier, just disable dedup to test, if it works then you can always
change your settings if you really want to enable it after that.
--
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Lachlan Holmes
2012-09-10 12:42:18 UTC
Permalink
It occurred after removing 1.4 TV of data from the pool. Which hung in the
process. I rebooted the server and no mounted pool but it's set to auto
mount according to the set all setting in the logs I've provided

Thanks Lachlan
Post by sehe
This problem started immediately after enabling dedup?
Dedup eats a lot of RAM.
Can you try to give zfs-fuse a lot more RAM? Use swap if you have to... I
know that's not workable but you can at least see whether it will load your
dataset if it can use more RAM for DDT
$0.02
Post by Lachlan Holmes
Hey Guys,
I can't access my data anymore.
ZFS-Fuse mounts my pool called "storage" but after a reboot the pool no
longer mounts to m=/storage
# sudo zfs get all storage
NAME PROPERTY VALUE SOURCE
storage type filesystem -
storage creation Wed Dec 14 9:15 2011 -
storage used 4.16T -
storage available 1.16T -
storage referenced 4.16T -
storage compressratio 1.00x -
storage mounted no -
storage quota none default
storage reservation none default
storage recordsize 128K default
storage mountpoint /storage local
storage sharenfs off default
storage checksum on default
storage compression off default
storage atime on default
storage devices on default
storage exec on default
storage setuid on default
storage readonly off default
storage zoned off default
storage snapdir hidden default
storage aclmode groupmask default
storage aclinherit restricted default
storage canmount on default
storage xattr on default
storage copies 1 default
storage version 4 -
storage utf8only off -
storage normalization none -
storage casesensitivity sensitive -
storage vscan off default
storage nbmand off default
storage sharesmb off default
storage refquota none default
storage refreservation none default
storage primarycache all default
storage secondarycache all default
storage usedbysnapshots 0 -
storage usedbydataset 4.16T -
storage usedbychildren 1.17G -
storage usedbyrefreservation 0 -
storage logbias latency default
storage dedup on local
storage mlslabel on -
When i do a sudo zfs mount i get the following.
cannot mount 'storage': mountpoint or dataset is busy
This is history of the pool.
2011-12-14.09:15:17 zpool create storage -m /storage raidz2
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30PHJED
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30RUXLD
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30RW2LD
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30SAHAD
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30SAT8D spare
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F32M0J1D -f
2012-02-06.19:55:54 zpool scrub -s storage
2012-02-06.19:56:21 zpool scrub -s storage
2012-03-07.21:56:08 zpool scrub -s storage
2012-04-15.08:08:46 zpool scrub -s storage
2012-04-15.08:08:49 zpool scrub -s storage
2012-05-31.20:03:45 zpool scrub -s storage
2012-05-31.20:03:47 zpool scrub -s storage
2012-08-04.18:16:02 zpool scrub storage
2012-08-08.18:36:26 zpool scrub storage
2012-08-11.09:47:00 zpool scrub storage
2012-09-05.18:27:27 zpool scrub storage
2012-09-05.18:34:00 zfs set dedup=on storage
can anyone explain why the mounted is set to no and then i can't mount
it? or should i give up?
regards
lachlan
--
To visit our Web site, click on http://zfs-fuse.net/
--
To post to this group, send email to zfs-fuse-/***@public.gmane.org
To visit our Web site, click on http://zfs-fuse.net/
sehe
2012-09-10 22:33:03 UTC
Permalink
Okay then, you're probably running into the wellknown problem of
excessively slow deletion under dedup.

It didn't get 'hung in the process': it just takes forever to complete.
Rebooting doesn't help, in fact it makes it worse: the pending IO
transactions will be completed at pool import, causing the datasets to
not-mount, precisely as you have found out.

Some later pool versions have alleviated some of the trouble with this.
Also, adding more RAM may speed up considerably/immensely. If you care to
try, you might bring the pool to a ZFS/zfsonlinux server box with ample RAM
[1]. Let the transaction(s) run to completion and all should be fine.

I recommend against using dedup unless you absolutely need it. If you do,
run on server hardware and learn lots about tuning and dimensioning up
front as was suggested by others.

Cheers,
Seth

[1] (to benefit from more RAM and possibly later versions; chances are
there won't be benefits from the ZFS version, since the pool is from
another version. Beware: don't upgrade the pool version unless you don't
need to access it using older zfs(-fuse) versions anymore!)
Post by Lachlan Holmes
It occurred after removing 1.4 TV of data from the pool. Which hung in the
process. I rebooted the server and no mounted pool but it's set to auto
mount according to the set all setting in the logs I've provided
Thanks Lachlan
Post by sehe
This problem started immediately after enabling dedup?
Dedup eats a lot of RAM.
Can you try to give zfs-fuse a lot more RAM? Use swap if you have to... I
know that's not workable but you can at least see whether it will load your
dataset if it can use more RAM for DDT
$0.02
Post by Lachlan Holmes
Hey Guys,
I can't access my data anymore.
ZFS-Fuse mounts my pool called "storage" but after a reboot the pool no
longer mounts to m=/storage
# sudo zfs get all storage
NAME PROPERTY VALUE SOURCE
storage type filesystem -
storage creation Wed Dec 14 9:15 2011 -
storage used 4.16T -
storage available 1.16T -
storage referenced 4.16T -
storage compressratio 1.00x -
storage mounted no -
storage quota none default
storage reservation none default
storage recordsize 128K default
storage mountpoint /storage local
storage sharenfs off default
storage checksum on default
storage compression off default
storage atime on default
storage devices on default
storage exec on default
storage setuid on default
storage readonly off default
storage zoned off default
storage snapdir hidden default
storage aclmode groupmask default
storage aclinherit restricted default
storage canmount on default
storage xattr on default
storage copies 1 default
storage version 4 -
storage utf8only off -
storage normalization none -
storage casesensitivity sensitive -
storage vscan off default
storage nbmand off default
storage sharesmb off default
storage refquota none default
storage refreservation none default
storage primarycache all default
storage secondarycache all default
storage usedbysnapshots 0 -
storage usedbydataset 4.16T -
storage usedbychildren 1.17G -
storage usedbyrefreservation 0 -
storage logbias latency default
storage dedup on local
storage mlslabel on -
When i do a sudo zfs mount i get the following.
cannot mount 'storage': mountpoint or dataset is busy
This is history of the pool.
2011-12-14.09:15:17 zpool create storage -m /storage raidz2
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30PHJED
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30RUXLD
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30RW2LD
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30SAHAD
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30SAT8D spare
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F32M0J1D -f
2012-02-06.19:55:54 zpool scrub -s storage
2012-02-06.19:56:21 zpool scrub -s storage
2012-03-07.21:56:08 zpool scrub -s storage
2012-04-15.08:08:46 zpool scrub -s storage
2012-04-15.08:08:49 zpool scrub -s storage
2012-05-31.20:03:45 zpool scrub -s storage
2012-05-31.20:03:47 zpool scrub -s storage
2012-08-04.18:16:02 zpool scrub storage
2012-08-08.18:36:26 zpool scrub storage
2012-08-11.09:47:00 zpool scrub storage
2012-09-05.18:27:27 zpool scrub storage
2012-09-05.18:34:00 zfs set dedup=on storage
can anyone explain why the mounted is set to no and then i can't mount
it? or should i give up?
regards
lachlan
--
To visit our Web site, click on http://zfs-fuse.net/
--
To post to this group, send email to zfs-fuse-/***@public.gmane.org
To visit our Web site, click on http://zfs-fuse.net/
Lachlan Holmes
2012-09-11 09:12:07 UTC
Permalink
hey sehe,

this server is my personal nas box.

I let the server sit over night and today during work and when i came back
home.... MY DATA IS BACK!!!!!

you were right about the excessively slow deletion under dedup
and that's what caused it to hang...

i guess this issue is now well known to me know.

moving forward what settings should i put on the pool to not cause this
again.

please note im not a linux admin im a windows admin by trade so be nice to
me.

Im very happy its back... now to start the backup project!

lachlan. :)
Post by sehe
Okay then, you're probably running into the wellknown problem of
excessively slow deletion under dedup.
It didn't get 'hung in the process': it just takes forever to complete.
Rebooting doesn't help, in fact it makes it worse: the pending IO
transactions will be completed at pool import, causing the datasets to
not-mount, precisely as you have found out.
Some later pool versions have alleviated some of the trouble with this.
Also, adding more RAM may speed up considerably/immensely. If you care to
try, you might bring the pool to a ZFS/zfsonlinux server box with ample RAM
[1]. Let the transaction(s) run to completion and all should be fine.
I recommend against using dedup unless you absolutely need it. If you do,
run on server hardware and learn lots about tuning and dimensioning up
front as was suggested by others.
Cheers,
Seth
[1] (to benefit from more RAM and possibly later versions; chances are
there won't be benefits from the ZFS version, since the pool is from
another version. Beware: don't upgrade the pool version unless you don't
need to access it using older zfs(-fuse) versions anymore!)
Post by Lachlan Holmes
It occurred after removing 1.4 TV of data from the pool. Which hung in
the process. I rebooted the server and no mounted pool but it's set to auto
mount according to the set all setting in the logs I've provided
Thanks Lachlan
Post by sehe
This problem started immediately after enabling dedup?
Dedup eats a lot of RAM.
Can you try to give zfs-fuse a lot more RAM? Use swap if you have to...
I know that's not workable but you can at least see whether it will load
your dataset if it can use more RAM for DDT
$0.02
Post by Lachlan Holmes
Hey Guys,
I can't access my data anymore.
ZFS-Fuse mounts my pool called "storage" but after a reboot the pool no
longer mounts to m=/storage
# sudo zfs get all storage
NAME PROPERTY VALUE SOURCE
storage type filesystem -
storage creation Wed Dec 14 9:15 2011 -
storage used 4.16T -
storage available 1.16T -
storage referenced 4.16T -
storage compressratio 1.00x -
storage mounted no -
storage quota none default
storage reservation none default
storage recordsize 128K default
storage mountpoint /storage local
storage sharenfs off default
storage checksum on default
storage compression off default
storage atime on default
storage devices on default
storage exec on default
storage setuid on default
storage readonly off default
storage zoned off default
storage snapdir hidden default
storage aclmode groupmask default
storage aclinherit restricted default
storage canmount on default
storage xattr on default
storage copies 1 default
storage version 4 -
storage utf8only off -
storage normalization none -
storage casesensitivity sensitive -
storage vscan off default
storage nbmand off default
storage sharesmb off default
storage refquota none default
storage refreservation none default
storage primarycache all default
storage secondarycache all default
storage usedbysnapshots 0 -
storage usedbydataset 4.16T -
storage usedbychildren 1.17G -
storage usedbyrefreservation 0 -
storage logbias latency default
storage dedup on local
storage mlslabel on -
When i do a sudo zfs mount i get the following.
cannot mount 'storage': mountpoint or dataset is busy
This is history of the pool.
2011-12-14.09:15:17 zpool create storage -m /storage raidz2
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30PHJED
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30RUXLD
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30RW2LD
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30SAHAD
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F30SAT8D spare
disk/by-id/scsi-SATA_Hitachi_HDS7230_MN1220F32M0J1D -f
2012-02-06.19:55:54 zpool scrub -s storage
2012-02-06.19:56:21 zpool scrub -s storage
2012-03-07.21:56:08 zpool scrub -s storage
2012-04-15.08:08:46 zpool scrub -s storage
2012-04-15.08:08:49 zpool scrub -s storage
2012-05-31.20:03:45 zpool scrub -s storage
2012-05-31.20:03:47 zpool scrub -s storage
2012-08-04.18:16:02 zpool scrub storage
2012-08-08.18:36:26 zpool scrub storage
2012-08-11.09:47:00 zpool scrub storage
2012-09-05.18:27:27 zpool scrub storage
2012-09-05.18:34:00 zfs set dedup=on storage
can anyone explain why the mounted is set to no and then i can't mount
it? or should i give up?
regards
lachlan
--
To visit our Web site, click on http://zfs-fuse.net/
--
To post to this group, send email to zfs-fuse-/***@public.gmane.org
To visit our Web site, click on http://zfs-fuse.net/
sehe
2012-09-11 12:16:24 UTC
Permalink
Post by Lachlan Holmes
i guess this issue is now well known to me know.
I laughed :)

It's a sad state of affairs, really. Not undocumented, but still.

The best way is: create a pool and never enable dedup. Never at all.
(To recreate an existing pool, `zfs send` to backup media and
`receive` after creating a pool from scratch. Yes this is a painful
process).

Emmanuels repo contains a newer pool version (26), but IIRC zfs-
onlinux (pool version 28?) contains the real improvements that make
this problem less rough to deal with. (Note that it may also occurr
when a send/receive was aborted midflight, leaving many temporary
dataset holds; in particular this problem should be alleviated with
newer pool versions).

Good luck
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