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zfs snapshort says "dataset is busy". Any better solution than remounting file system ?

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David Kirkby

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Feb 4, 2010, 9:46:32 AM2/4/10
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I've hit a problem that a Google search shows others have had before -
trying to create a snapshot, one gets a message that the dataset is
busy.

# zfs snapshot rootpool2/ROOT/S10u7zfsB@today
cannot create snapshot 'rootpool2/ROOT/S10u7zfsB@today': dataset is
busy

The usual way around this is to unmount then remount the file system.
That is not always a practical option though. I can't possibly unmount
a file system that many are using. One of the benefits of ZFS is the
snapshots. Being told the dataset is busy is not a lot of use.

Is there a better solution, or a decent explanation of why this
happens?

Dave

cindy

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Feb 4, 2010, 12:48:42 PM2/4/10
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Hi Dave,

One explanation of this problem was a bug, but it was fixed in
the past year.

Which Solaris release is this?

Thanks,

Cindy

cindy

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Feb 4, 2010, 12:55:02 PM2/4/10
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Sorry, I see now that you are running s10u7. This CR was fixed in
s10u8:

http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6462803

Cindy

David Kirkby

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Feb 4, 2010, 6:47:34 PM2/4/10
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Thank you for that Cindy. I can't seem to find any patch for Solaris
10 update 7. I would have thought this significant enough to backport.
It seems to have hit quite a few people if you Google it.

Dave

John D Groenveld

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Feb 4, 2010, 7:11:35 PM2/4/10
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In article <31b66be4-9672-421f...@h2g2000yqj.googlegroups.com>,

David Kirkby <drki...@gmail.com> wrote:
>On Feb 4, 5:55�pm, cindy <cindy.swearin...@sun.com> wrote:
>> http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6462803

>
>Thank you for that Cindy. I can't seem to find any patch for Solaris
>10 update 7. I would have thought this significant enough to backport.

The fix for BugID 6462803 is in PatchID 14144[4-5].

From Martin Paul's PCA:
Patch IR CR RSB Age Synopsis
------ -- - -- --- --- -------------------------------------------------------
141445 09 = 09 RS- 114 SunOS 5.10_x86: kernel patch

Happy hacking,
John
groe...@acm.org

Richard B. Gilbert

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Feb 4, 2010, 7:14:38 PM2/4/10
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Isn't it significant enough to upgrade to Solaris 10 update 8 in order
to be able to install the fix?

Perhaps, if you wait, a patch to update 7 will be forthcoming. Or
perhaps not!

ChrisS

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Feb 6, 2010, 11:15:57 AM2/6/10
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On Feb 4, 7:14 pm, "Richard B. Gilbert" <rgilber...@comcast.net>
wrote:

It should be fixed if David applied the Recommended or Sun Alert Patch
Clusters, right? They both contain Kernel patch 1414[4|5]-09. I've
successfully loaded both Alert and Recommended this month, and they
didn't "seem to break anything. (No promises) :-) It should get you
up to ZFS v15, which fixed a similar problem I was having with ZFS
(oh, rebooting after creating a new BE (it left legacy mount entries
in /etc/vfstab), not that you're having this issue, though I was also
using S10u7 at the time. Upate 8 has a bad raidctl command in it (off
of DVD)

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