subject:"zfs snapshot_limit is not respected"

Re: zfs snapshot_limit is not respected

2017-02-03 Thread Ultima

Yes just tested this and it is how it works.

Thanks for the explanation.

Ultima
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Re: zfs snapshot_limit is not respected

2017-02-03 Thread Gary Palmer

On Fri, Feb 03, 2017 at 10:27:48AM -0500, Ultima wrote:
> Hey Gary,
> 
> You are probably right. Do you know how to "lock" this property by chance?
> I'v read this exact line several times trying to understand the exact
> meaning. The "user is allowed to change the limit" I *think* is referring
> to the zfs allow command. The problem is that I checked the dataset and it
> is showing no permissions granted to a user. So I guess user in this case
> is also including the root user, but how does one lock the property from
> root? I keep going through the manpage looking for something I may have
> missed but keep coming up empty.

Hi,

I suspect you can't lock root out, but you could allow a different user
to create snapshots.  If you use that user to create snapshots, they
should be subject to the snapshot limit, assuming you don't let them
change that property.

Regards,

Gary

> Thanks for replying,
> Ultima
> 
> On Fri, Feb 3, 2017 at 7:42 AM, Gary Palmer  wrote:
> 
> > On Thu, Feb 02, 2017 at 09:31:58PM -0500, Ultima wrote:
> > > I recently moved some data on a box with limited space. I decided I
> > should
> > > limit the snapshots so that space would not become an issue. I just check
> > > back a week later to find out the box is hitting the borderline. Doing I
> > > quick check I realized that the snapshot_limit is not being respected.
> > >
> > > # uname -a
> > > FreeBSD R1 11.0-STABLE FreeBSD 11.0-STABLE #17 r312232: Sun Jan 15
> > 10:59:10
> > > EST 2017 root@S1:/usr/src/11-STABLE/obj/usr/src/11-STABLE/src/sys/
> > MYKERNEL
> > >  amd64
> > >
> > > # zfs create zroot/bhyve/test
> > > # zfs set snapshot_limit=0 zroot/bhyve/test
> > > # zfs snapshot zroot/bhyve/test@1
> > >
> > >
> > > # zfs snapshot zroot/bhyve/test@2
> > > # zfs snapshot zroot/bhyve/test@3
> > > # zfs list -t snapshot | grep zroot/bhyve/test
> > > zroot/bhyve/test@1   0  -
> > >  88K  -
> > > zroot/bhyve/test@2   0  -
> > >  88K  -
> > > zroot/bhyve/test@3   0  -
> > >  88K  -
> > > # zfs get all zroot/bhyve/test | grep snapshot
> > > zroot/bhyve/test  usedbysnapshots   0  -
> > > zroot/bhyve/test  snapshot_limit0  local
> > > zroot/bhyve/test  snapshot_count3  local
> > >
> > > Also wanted to verify 0 was not being mistaken for none.
> > >
> > > # for snapshot in `zfs list -t snapshot | grep zroot/bhyve/test | awk
> > > '{print $1}'`; do zfs destroy $snapshot ; done
> > >
> > > # zfs get all zroot/bhyve/test | grep snapshot
> > > zroot/bhyve/test  usedbysnapshots   0  -
> > > zroot/bhyve/test  snapshot_limit0  local
> > > zroot/bhyve/test  snapshot_count0  local
> > >
> > > # zfs set snapshot_limit=1 zroot/bhyve/test
> > > # zfs snapshot zroot/bhyve/test@1
> > > # zfs snapshot zroot/bhyve/test@2
> > > # zfs snapshot zroot/bhyve/test@3
> > > # zfs get all zroot/bhyve/test | grep snapshot
> > > zroot/bhyve/test  usedbysnapshots   0  -
> > > zroot/bhyve/test  snapshot_limit1  local
> > > zroot/bhyve/test  snapshot_count3  local
> > >
> > >
> > > Also tested on head
> > > FreeBSD S1 12.0-CURRENT FreeBSD 12.0-CURRENT #26 r312388: Wed Jan 18
> > > 12:38:52 EST 2017
> > > root@S1:/usr/src/head/obj/usr/src/head/src/sys/MYKERNEL-NODEBUG
> > >  amd64
> >
> > Hi,
> >
> > I suspect this line from the manpage is key:
> >
> > The limit is not enforced if the user is allowed to change the limit
> >
> > Regards,
> >
> > Gary
> >
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Re: zfs snapshot_limit is not respected

2017-02-03 Thread Ultima

Hey Gary,

You are probably right. Do you know how to "lock" this property by chance?
I'v read this exact line several times trying to understand the exact
meaning. The "user is allowed to change the limit" I *think* is referring
to the zfs allow command. The problem is that I checked the dataset and it
is showing no permissions granted to a user. So I guess user in this case
is also including the root user, but how does one lock the property from
root? I keep going through the manpage looking for something I may have
missed but keep coming up empty.

Thanks for replying,
Ultima

On Fri, Feb 3, 2017 at 7:42 AM, Gary Palmer  wrote:

> On Thu, Feb 02, 2017 at 09:31:58PM -0500, Ultima wrote:
> > I recently moved some data on a box with limited space. I decided I
> should
> > limit the snapshots so that space would not become an issue. I just check
> > back a week later to find out the box is hitting the borderline. Doing I
> > quick check I realized that the snapshot_limit is not being respected.
> >
> > # uname -a
> > FreeBSD R1 11.0-STABLE FreeBSD 11.0-STABLE #17 r312232: Sun Jan 15
> 10:59:10
> > EST 2017 root@S1:/usr/src/11-STABLE/obj/usr/src/11-STABLE/src/sys/
> MYKERNEL
> >  amd64
> >
> > # zfs create zroot/bhyve/test
> > # zfs set snapshot_limit=0 zroot/bhyve/test
> > # zfs snapshot zroot/bhyve/test@1
> >
> >
> > # zfs snapshot zroot/bhyve/test@2
> > # zfs snapshot zroot/bhyve/test@3
> > # zfs list -t snapshot | grep zroot/bhyve/test
> > zroot/bhyve/test@1   0  -
> >  88K  -
> > zroot/bhyve/test@2   0  -
> >  88K  -
> > zroot/bhyve/test@3   0  -
> >  88K  -
> > # zfs get all zroot/bhyve/test | grep snapshot
> > zroot/bhyve/test  usedbysnapshots   0  -
> > zroot/bhyve/test  snapshot_limit0  local
> > zroot/bhyve/test  snapshot_count3  local
> >
> > Also wanted to verify 0 was not being mistaken for none.
> >
> > # for snapshot in `zfs list -t snapshot | grep zroot/bhyve/test | awk
> > '{print $1}'`; do zfs destroy $snapshot ; done
> >
> > # zfs get all zroot/bhyve/test | grep snapshot
> > zroot/bhyve/test  usedbysnapshots   0  -
> > zroot/bhyve/test  snapshot_limit0  local
> > zroot/bhyve/test  snapshot_count0  local
> >
> > # zfs set snapshot_limit=1 zroot/bhyve/test
> > # zfs snapshot zroot/bhyve/test@1
> > # zfs snapshot zroot/bhyve/test@2
> > # zfs snapshot zroot/bhyve/test@3
> > # zfs get all zroot/bhyve/test | grep snapshot
> > zroot/bhyve/test  usedbysnapshots   0  -
> > zroot/bhyve/test  snapshot_limit1  local
> > zroot/bhyve/test  snapshot_count3  local
> >
> >
> > Also tested on head
> > FreeBSD S1 12.0-CURRENT FreeBSD 12.0-CURRENT #26 r312388: Wed Jan 18
> > 12:38:52 EST 2017
> > root@S1:/usr/src/head/obj/usr/src/head/src/sys/MYKERNEL-NODEBUG
> >  amd64
>
> Hi,
>
> I suspect this line from the manpage is key:
>
> The limit is not enforced if the user is allowed to change the limit
>
> Regards,
>
> Gary
>
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Re: zfs snapshot_limit is not respected

2017-02-03 Thread Gary Palmer

On Thu, Feb 02, 2017 at 09:31:58PM -0500, Ultima wrote:
> I recently moved some data on a box with limited space. I decided I should
> limit the snapshots so that space would not become an issue. I just check
> back a week later to find out the box is hitting the borderline. Doing I
> quick check I realized that the snapshot_limit is not being respected.
> 
> # uname -a
> FreeBSD R1 11.0-STABLE FreeBSD 11.0-STABLE #17 r312232: Sun Jan 15 10:59:10
> EST 2017 root@S1:/usr/src/11-STABLE/obj/usr/src/11-STABLE/src/sys/MYKERNEL
>  amd64
> 
> # zfs create zroot/bhyve/test
> # zfs set snapshot_limit=0 zroot/bhyve/test
> # zfs snapshot zroot/bhyve/test@1
> 
> 
> # zfs snapshot zroot/bhyve/test@2
> # zfs snapshot zroot/bhyve/test@3
> # zfs list -t snapshot | grep zroot/bhyve/test
> zroot/bhyve/test@1   0  -
>  88K  -
> zroot/bhyve/test@2   0  -
>  88K  -
> zroot/bhyve/test@3   0  -
>  88K  -
> # zfs get all zroot/bhyve/test | grep snapshot
> zroot/bhyve/test  usedbysnapshots   0  -
> zroot/bhyve/test  snapshot_limit0  local
> zroot/bhyve/test  snapshot_count3  local
> 
> Also wanted to verify 0 was not being mistaken for none.
> 
> # for snapshot in `zfs list -t snapshot | grep zroot/bhyve/test | awk
> '{print $1}'`; do zfs destroy $snapshot ; done
> 
> # zfs get all zroot/bhyve/test | grep snapshot
> zroot/bhyve/test  usedbysnapshots   0  -
> zroot/bhyve/test  snapshot_limit0  local
> zroot/bhyve/test  snapshot_count0  local
> 
> # zfs set snapshot_limit=1 zroot/bhyve/test
> # zfs snapshot zroot/bhyve/test@1
> # zfs snapshot zroot/bhyve/test@2
> # zfs snapshot zroot/bhyve/test@3
> # zfs get all zroot/bhyve/test | grep snapshot
> zroot/bhyve/test  usedbysnapshots   0  -
> zroot/bhyve/test  snapshot_limit1  local
> zroot/bhyve/test  snapshot_count3  local
> 
> 
> Also tested on head
> FreeBSD S1 12.0-CURRENT FreeBSD 12.0-CURRENT #26 r312388: Wed Jan 18
> 12:38:52 EST 2017
> root@S1:/usr/src/head/obj/usr/src/head/src/sys/MYKERNEL-NODEBUG
>  amd64

Hi,

I suspect this line from the manpage is key:

The limit is not enforced if the user is allowed to change the limit

Regards,

Gary
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zfs snapshot_limit is not respected

2017-02-02 Thread Ultima

I recently moved some data on a box with limited space. I decided I should
limit the snapshots so that space would not become an issue. I just check
back a week later to find out the box is hitting the borderline. Doing I
quick check I realized that the snapshot_limit is not being respected.

# uname -a
FreeBSD R1 11.0-STABLE FreeBSD 11.0-STABLE #17 r312232: Sun Jan 15 10:59:10
EST 2017 root@S1:/usr/src/11-STABLE/obj/usr/src/11-STABLE/src/sys/MYKERNEL
 amd64

# zfs create zroot/bhyve/test
# zfs set snapshot_limit=0 zroot/bhyve/test
# zfs snapshot zroot/bhyve/test@1


# zfs snapshot zroot/bhyve/test@2
# zfs snapshot zroot/bhyve/test@3
# zfs list -t snapshot | grep zroot/bhyve/test
zroot/bhyve/test@1   0  -
 88K  -
zroot/bhyve/test@2   0  -
 88K  -
zroot/bhyve/test@3   0  -
 88K  -
# zfs get all zroot/bhyve/test | grep snapshot
zroot/bhyve/test  usedbysnapshots   0  -
zroot/bhyve/test  snapshot_limit0  local
zroot/bhyve/test  snapshot_count3  local

Also wanted to verify 0 was not being mistaken for none.

# for snapshot in `zfs list -t snapshot | grep zroot/bhyve/test | awk
'{print $1}'`; do zfs destroy $snapshot ; done

# zfs get all zroot/bhyve/test | grep snapshot
zroot/bhyve/test  usedbysnapshots   0  -
zroot/bhyve/test  snapshot_limit0  local
zroot/bhyve/test  snapshot_count0  local

# zfs set snapshot_limit=1 zroot/bhyve/test
# zfs snapshot zroot/bhyve/test@1
# zfs snapshot zroot/bhyve/test@2
# zfs snapshot zroot/bhyve/test@3
# zfs get all zroot/bhyve/test | grep snapshot
zroot/bhyve/test  usedbysnapshots   0  -
zroot/bhyve/test  snapshot_limit1  local
zroot/bhyve/test  snapshot_count3  local


Also tested on head
FreeBSD S1 12.0-CURRENT FreeBSD 12.0-CURRENT #26 r312388: Wed Jan 18
12:38:52 EST 2017
root@S1:/usr/src/head/obj/usr/src/head/src/sys/MYKERNEL-NODEBUG
 amd64
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Re: zfs snapshot_limit is not respected

Re: zfs snapshot_limit is not respected

Re: zfs snapshot_limit is not respected

Re: zfs snapshot_limit is not respected

zfs snapshot_limit is not respected

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