Re: [zfs-discuss] Bugid 6535160

[eric kustarz]

>
> So either we're hitting a pretty serious zfs bug, or they're purposely
> holding back performance in Solaris 10 so that we all have a good  
> reason to
> upgrade to 11.  ;)

In general, for ZFS we try to push all changes from Nevada back to  
s10 updates.

In particular, "6535160 Lock contention on zl_lock from zil_commit"  
is pegged for s10u6.  And i believe we're going for an early build of  
update 6, so point patches should hopefully be available even earlier.

Nice to see filebench validating our performance work,
eric
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Re: [zfs-discuss] [osol-help] ZFS woes

[Scott L. Burson]

Okay, I've done a little more reading on ZFS and I see that metadata is already 
stored redundantly.  This means something had to go really wrong for me to lose 
a bunch of directories, as I did.  Okay, that's another piece of information 
I'm not sure what to make of, but I'll add it to the pile :)

I also see I should be storing important stuff on a filesystem with the 
`copies' property set higher than 1.

-- Scott
 
 
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Re: [zfs-discuss] b77 v. Solaris 806 zfs create

[Eric Schrock]

If you have a large pool (# of devices), you are hitting:

6632372 ZFS label writing/checksumming hurts scalability of large configs

Which was introduced in build 77 and is fixed in build 81.  If you have
a small pool, then I'm not sure what it could be.

- Eric

On Fri, Jan 04, 2008 at 04:07:08PM -0800, zfsmonk wrote:
> just installed b77 and having an issue with 'zfs create':
> 
> [EMAIL PROTECTED]:~] # time zfs create test/bo
> zfs create test/bo  157.21s user 8.21s system 99% cpu 2:46.47 total   
>   
> 
> [EMAIL PROTECTED]:~] #
> 
> This happens with each 'zfs create' On Solaris 806 it returns right away. Is 
> there some setting in b77 that is causing this or has anyone see this before?
> 
> Thanks.
>  
>  
> This message posted from opensolaris.org
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--
Eric Schrock, FishWorkshttp://blogs.sun.com/eschrock
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[zfs-discuss] b77 v. Solaris 806 zfs create

[zfsmonk]

just installed b77 and having an issue with 'zfs create':

[EMAIL PROTECTED]:~] # time zfs create test/bo
zfs create test/bo  157.21s user 8.21s system 99% cpu 2:46.47 total 


[EMAIL PROTECTED]:~] #

This happens with each 'zfs create' On Solaris 806 it returns right away. Is 
there some setting in b77 that is causing this or has anyone see this before?

Thanks.
 
 
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Re: [zfs-discuss] [osol-help] ZFS woes

[Scott L. Burson]

Oooh, I see build 74 suffered from 
http://bugs.opensolaris.org/view_bug.do?bug_id=6603147

There's not much info on that bug page, and I certainly don't recall seeing the 
blown assertion message.  Is it possible, nonetheless, that this is the cause 
of some of my problems?  I will Live Upgrade ASAP.

(It can't be the sole cause.  There has definitely been a hardware problem: 
when one of the SATA drives didn't show up, even the BIOS couldn't see it.  
However, that [i]could[/i] have been just a loose SATA data cable.)
 
 
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Re: [zfs-discuss] Can't access my data

[Stuart Low]

Heya,

> I have/had a zpool containing one filesystem.

Cool, simple scenario.

> I had to change my hostid and needed to import my pool, (I've done his
> OK in the past).
> After the import the mount of my filesystem failed.

I take it you did the 'export' part with the other hostid? Wondering if
something could have got 'kludged' prior to the host change.

> # zpool import homespool
> cannot mount 'homespool/homes': mountpoint or dataset is busy

What is the path it's being mounted on? Does it exist, is there nothing
on it etc?

If all else fails you could try a forced unmount with zfs unmount -f
homespool/homes . The ZFS developers on this list might cringe at that
suggestion though. :)

> The data seems it might still exist, (correct amount of used space is
> reported), but /homespool
> doesn't provide me any obvious way to get to it any more.
> # zfs list
> NAME  USED  AVAIL  REFER  MOUNTPOINT
> homespool9.91G   124G18K  /homespool
> homespool/homes  9.91G   124G  9.91G  /homes
> 
> ls -laR  /homespool


What about ls /homes ? That's the specified mount point and by the looks
of the above message the mount hasn't succeeded.

When a zfs filesystem has a specified mountpoint outside of the volumes
base mount I believe (and there's people on this list who could probably
confirm) it disappears from the volume mount. It may add a symlink too
(I'm just not sure if that's automatic :)) but since the mount failed it
doesn't make sense.

> I'd dearly love to recover this pool, (no backup, yes I know :-(.
> It WAS a mirror, I scrubbed it and no errors were seen, I've since detached
> one device to try to see if anything changed.

Well, the good things is you've got the volume mounted. Assuming zpool
status homespool returns a good result you should be in luck.

Hope that helps,

-- 
Stuart Low
Systems Infrastructure Manager
iseek Communications Pty Ltd
Excellence in business data solutions
ph 1300 661 668 fax 1300 661 540
www.iseek.com.au

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Re: [zfs-discuss] Can't access my data

[Mike Gerdts]

On Jan 4, 2008 2:42 PM, George Shepherd - Sun Microsystems Home system
<[EMAIL PROTECTED]> wrote:
> Hi Folks..
>
> I have/had a zpool containing one filesystem.
>
> I had to change my hostid and needed to import my pool, (I've done his
> OK in the past).
> After the import the mount of my filesystem failed.
>
> # zpool import homespool
> cannot mount 'homespool/homes': mountpoint or dataset is busy
  ^^

> # zfs list
> NAME  USED  AVAIL  REFER  MOUNTPOINT
> homespool9.91G   124G18K  /homespool
> homespool/homes  9.91G   124G  9.91G  /homes
^^
Is something else already mounted at /homes?

# df -k /homes

Did you or someone else "cd /homes" before trying this, thus
causing the mount point to be busy?

# fuser /homes

If you still can't resolve it

# zfs set mountpoint=/somewhere_else homespool/homes
# zfs mount -a (not sure this needed)
# cd /somewhere_else

-- 
Mike Gerdts
http://mgerdts.blogspot.com/
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[zfs-discuss] Can't access my data

[George Shepherd - Sun Microsystems Home system]

Hi Folks..

I have/had a zpool containing one filesystem.

I had to change my hostid and needed to import my pool, (I've done his 
OK in the past).

After the import the mount of my filesystem failed.

# zpool import homespool
cannot mount 'homespool/homes': mountpoint or dataset is busy

The data seems it might still exist, (correct amount of used space is 
reported), but /homespool

doesn't provide me any obvious way to get to it any more.

# zfs list
NAME  USED  AVAIL  REFER  MOUNTPOINT
homespool9.91G   124G18K  /homespool
homespool/homes  9.91G   124G  9.91G  /homes

ls -laR  /homespool
/homespool:
total 5
drwxr-xr-x   2 root sys2 Jan  4 11:48 .
drwxr-xr-x  48 root root1024 Jan  4 20:45 ..

I'd dearly love to recover this pool, (no backup, yes I know :-(.
It WAS a mirror, I scrubbed it and no errors were seen, I've since detached
one device to try to see if anything changed.

Can anyone point out how I might read the data ??

TIA
-George

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n:Shepherd;George
org:SUN Microsystems;Solaris Revenue Product Engineering, Core team  -Internet
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Re: [zfs-discuss] zfs device busy

[Marion Hakanson]

[EMAIL PROTECTED] said:
> When i modify zfs FS propreties I get "device busy"
> -bash-3.00# zfs set mountpoint=/mnt1 pool/zfs1 cannot unmount '/mnt': Device
> busy

> Do you know how to identify porcess accessing this FS ? fuser doesn't work
> with zfs! 

Actually, fuser works fine with ZFS here.  One odd thing I discovered
is that something like "fuser -c /mnt" does not always show anything,
but "cd /mnt && fuser -c ." will work.  Of course, it will list the PID
of your shell, but it also lists other processes under the mount point.
This is true for me on Solaris-10U2 through 10U4, and UFS, ZFS, and
NFS mount points.

Regards,

Marion


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[zfs-discuss] copy on write related query

[sudarshan sridhar]

Hi,
   
Does copy-on-write happens every time when any data block of ZFS is getting 
modified? or one needs to configure to enable COW for ZFS while creating? 
   
  Also where exactly COWed data written if my storage pool is a single physical 
device or even multiple divices are there but used a single device.
   
  Thanks & Regards,
  sridhar.

   
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Re: [zfs-discuss] zfs device busy

[Sanjeev Bagewadi]

Carol,

Probably "/mnt" is already in use ie. some other filesystem is mounted 
there.
Can you please verify ?

What is the original mountpoint of pool/zfs1 ?

Regards,
Sanjeev.

Caroline Carol wrote:
> Hi all,
>  
> When i modify zfs FS propreties I get "device busy"
>  
> -bash-3.00# zfs set mountpoint=/mnt1 pool/zfs1
> cannot unmount '/mnt': Device busy
>  
>  
> Do you know how to identify porcess accessing this FS ?
> fuser doesn't work with zfs!
>  
>  
> Thanks a lot
> regards
>  
> Carol
>
> 
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> 
>  
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-- 
Solaris Revenue Products Engineering,
India Engineering Center,
Sun Microsystems India Pvt Ltd.
Tel:x27521 +91 80 669 27521 

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[zfs-discuss] zfs device busy

[Caroline Carol]

Hi all,

When i modify zfs FS propreties I get "device busy"

-bash-3.00# zfs set mountpoint=/mnt1 pool/zfs1
cannot unmount '/mnt': Device busy


Do you know how to identify porcess accessing this FS ?
fuser doesn't work with zfs!


Thanks a lot
regards

Carol


  
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