how to load dm-multisnapshot [with LVM patch]

how to load dm-multisnapshot [with LVM patch]

[Busby]

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Hi All,

I get the patches from:
Linux kernel 2.6.34 patch:
http://people.redhat.com/mpatocka/patches/kernel/new-snapshots/r19/

LVM2-2.02.64 patch:
http://people.redhat.com/msnitzer/patches/multisnap/lvm2/LVM2-2.02.64/



but when I used it, the segment type can not find, can anyone help me?



[root@new-host-34 ~]# pvcreate /dev/sd[bcdef]

[root@new-host-34 ~]# vgcreate vg00 /dev/sd[bcdef]

[root@new-host-34 ~]# lvcreate -L 100G -n lv_test /dev/vg00

[root@new-host-34 ~]# lvcreate -L 200G -c 256 --sharedstore  mikulas -s
/dev/vg00/lv_test

  *WARNING: Unrecognised segment type multisnapshot*

*  Cannot update volume group vg00 with unknown segments in it!*

[root@new-host-34 ~]# lvscan

ACTIVE         '/dev/vg00/lv_test' [100.00 GiB] inherit

  inactive          '/dev/vg00/lv_test-shared' [200.00 GiB] inherit

[root@new-host-34 ~]# lvcreate -s -n lv_test_ss1 /dev/vg00/lv_test

  *Unable to create new logical volume with no extents*





The dm modules in the system:



[root@new-host-34 LVM2.2.02.64]# lsmod |grep dm
dm_snapshot            25583  0
dm_store_daniel        11304  0
dm_store_mikulas       43265  0
dm_multisnapshot       20276  2 dm_store_daniel,dm_store_mikulas
dm_mirror              11564  0
dm_multipath           14594  0
scsi_dh                 5480  1 dm_multipath
dm_region_hash          8233  1 dm_mirror
dm_log                  8158  2 dm_mirror,dm_region_hash
dm_mod                 58855  9 dm_snapshot,*
dm_store_daniel,dm_store_mikulas,dm_multisnapshot*
,dm_mirror,dm_multipath,dm_log





        I just want to use the multisnap by LVM2 command. But I don't know
is there any document about HOW-TO?

        Thank you very much.







Best regards,

Busby

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Re: how to load dm-multisnapshot [with LVM patch]

[Busby]

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Hi,
     I have debug the lvm2.02.64 (with the shared-snapshot patches).
     In the last email I mentioned the 'Cannot update volume group vg00 with
unknown segments in it!'
     The debug mesg: " vg_has_unknown_segments  function: snapshot0 has
unknown seg."
      I don't know when the snapshot0 has been created?why its segtype
unkown?
     Hope for your help.
     Thank you.


Best regards,
Busby

在 2010年5月24日 下午5:04，Busby <chaimvy@gmail.com>写道：

> Hi All,
>
> I get the patches from:
> Linux kernel 2.6.34 patch:
> http://people.redhat.com/mpatocka/patches/kernel/new-snapshots/r19/
>
> LVM2-2.02.64 patch:
> http://people.redhat.com/msnitzer/patches/multisnap/lvm2/LVM2-2.02.64/
>
>
>
> but when I used it, the segment type can not find, can anyone help me?
>
>
>
> [root@new-host-34 ~]# pvcreate /dev/sd[bcdef]
>
> [root@new-host-34 ~]# vgcreate vg00 /dev/sd[bcdef]
>
> [root@new-host-34 ~]# lvcreate -L 100G -n lv_test /dev/vg00
>
> [root@new-host-34 ~]# lvcreate -L 200G -c 256 --sharedstore  mikulas -s
> /dev/vg00/lv_test
>
>   *WARNING: Unrecognised segment type multisnapshot*
>
> *  Cannot update volume group vg00 with unknown segments in it!*
>
> [root@new-host-34 ~]# lvscan
>
> ACTIVE         '/dev/vg00/lv_test' [100.00 GiB] inherit
>
>   inactive          '/dev/vg00/lv_test-shared' [200.00 GiB] inherit
>
> [root@new-host-34 ~]# lvcreate -s -n lv_test_ss1 /dev/vg00/lv_test
>
>   *Unable to create new logical volume with no extents*
>
>
>
>
>
> The dm modules in the system:
>
>
>
> [root@new-host-34 LVM2.2.02.64]# lsmod |grep dm
> dm_snapshot            25583  0
> dm_store_daniel        11304  0
> dm_store_mikulas       43265  0
> dm_multisnapshot       20276  2 dm_store_daniel,dm_store_mikulas
> dm_mirror              11564  0
> dm_multipath           14594  0
> scsi_dh                 5480  1 dm_multipath
> dm_region_hash          8233  1 dm_mirror
> dm_log                  8158  2 dm_mirror,dm_region_hash
> dm_mod                 58855  9 dm_snapshot,*
> dm_store_daniel,dm_store_mikulas,dm_multisnapshot*
> ,dm_mirror,dm_multipath,dm_log
>
>
>
>
>
>         I just want to use the multisnap by LVM2 command. But I don't know
> is there any document about HOW-TO?
>
>         Thank you very much.
>
>
>
>
>
>
>
> Best regards,
>
> Busby
>

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Re: how to load dm-multisnapshot [with LVM patch]

[Mike Snitzer]

I'll retest and will share my findings later today (the 2.02.64 patches
on my website were refreshed from 2.02.63+ that was very close to the
final 2.02.64); but I didn't retest them at that time).

But I handed these 2.02.64 patches off to Mikulas and I have to believe
he'd have seen this issue when testing his further development.  To my
knowledge he hasn't.

Anyway, we'll see, but I've seen similar errors when I've created a
shared cow LV using a sandbox lvm2 build (not installed to the system).
And then the system's lvm2 didn't have multisnapshot support.  In that
situation you'll see the same type of unknown segment errors when
running the system's lvm2 commands.

Mike

On Tue, May 25 2010 at 11:52pm -0400,
Busby <chaimvy@gmail.com> wrote:

> Hi,
>      I have debug the lvm2.02.64 (with the shared-snapshot patches).
>      In the last email I mentioned the 'Cannot update volume group vg00 with
> unknown segments in it!'
>      The debug mesg: " vg_has_unknown_segments  function: snapshot0 has
> unknown seg."
>       I don't know when the snapshot0 has been created?why its segtype
> unkown?
>      Hope for your help.
>      Thank you.
> 
> 
> Best regards,
> Busby
> 
> 在 2010年5月24日 下午5:04，Busby <chaimvy@gmail.com>写道：
> 
> > Hi All,
> >
> > I get the patches from:
> > Linux kernel 2.6.34 patch:
> > http://people.redhat.com/mpatocka/patches/kernel/new-snapshots/r19/
> >
> > LVM2-2.02.64 patch:
> > http://people.redhat.com/msnitzer/patches/multisnap/lvm2/LVM2-2.02.64/
> >
> >
> >
> > but when I used it, the segment type can not find, can anyone help me?
> >
> >
> >
> > [root@new-host-34 ~]# pvcreate /dev/sd[bcdef]
> >
> > [root@new-host-34 ~]# vgcreate vg00 /dev/sd[bcdef]
> >
> > [root@new-host-34 ~]# lvcreate -L 100G -n lv_test /dev/vg00
> >
> > [root@new-host-34 ~]# lvcreate -L 200G -c 256 --sharedstore  mikulas -s
> > /dev/vg00/lv_test
> >
> >   *WARNING: Unrecognised segment type multisnapshot*
> >
> > *  Cannot update volume group vg00 with unknown segments in it!*
> >
> > [root@new-host-34 ~]# lvscan
> >
> > ACTIVE         '/dev/vg00/lv_test' [100.00 GiB] inherit
> >
> >   inactive          '/dev/vg00/lv_test-shared' [200.00 GiB] inherit
> >
> > [root@new-host-34 ~]# lvcreate -s -n lv_test_ss1 /dev/vg00/lv_test
> >
> >   *Unable to create new logical volume with no extents*
> >
> >
> >
> >
> >
> > The dm modules in the system:
> >
> >
> >
> > [root@new-host-34 LVM2.2.02.64]# lsmod |grep dm
> > dm_snapshot            25583  0
> > dm_store_daniel        11304  0
> > dm_store_mikulas       43265  0
> > dm_multisnapshot       20276  2 dm_store_daniel,dm_store_mikulas
> > dm_mirror              11564  0
> > dm_multipath           14594  0
> > scsi_dh                 5480  1 dm_multipath
> > dm_region_hash          8233  1 dm_mirror
> > dm_log                  8158  2 dm_mirror,dm_region_hash
> > dm_mod                 58855  9 dm_snapshot,*
> > dm_store_daniel,dm_store_mikulas,dm_multisnapshot*
> > ,dm_mirror,dm_multipath,dm_log
> >
> >
> >
> >
> >
> >         I just want to use the multisnap by LVM2 command. But I don't know
> > is there any document about HOW-TO?
> >
> >         Thank you very much.
> >
> >
> >
> >
> >
> >
> >
> > Best regards,
> >
> > Busby
> >

> --
> dm-devel mailing list
> dm-devel@redhat.com
> https://www.redhat.com/mailman/listinfo/dm-devel

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Re: how to load dm-multisnapshot [with LVM patch]

[Mikulas Patocka]

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On Wed, 26 May 2010, Busby wrote:

> Hi,
>      I have debug the lvm2.02.64 (with the shared-snapshot patches).
>      In the last email I mentioned the 'Cannot update volume group vg00 with
> unknown segments in it!'
>      The debug mesg: " vg_has_unknown_segments  function: snapshot0 has
> unknown seg."
>       I don't know when the snapshot0 has been created?why its segtype
> unkown?
>      Hope for your help.
>      Thank you.
>
> Best regards,
> Busby

Hi

I think that you didn't run aclocal and autoconf before ./configure and 
make. So the multisnapshot module wasn't compiled in.

Do make distclean, then aclocal, autoconf, ./configure, make

Mikulas

> ÔÚ 2010Äê5ÔÂ24ÈÕ ÏÂÎç5:04£¬Busby <chaimvy@gmail.com>дµÀ£º
> 
> > Hi All,
> >
> > I get the patches from:
> > Linux kernel 2.6.34 patch:
> > http://people.redhat.com/mpatocka/patches/kernel/new-snapshots/r19/
> >
> > LVM2-2.02.64 patch:
> > http://people.redhat.com/msnitzer/patches/multisnap/lvm2/LVM2-2.02.64/
> >
> >
> >
> > but when I used it, the segment type can not find, can anyone help me?
> >
> >
> >
> > [root@new-host-34 ~]# pvcreate /dev/sd[bcdef]
> >
> > [root@new-host-34 ~]# vgcreate vg00 /dev/sd[bcdef]
> >
> > [root@new-host-34 ~]# lvcreate -L 100G -n lv_test /dev/vg00
> >
> > [root@new-host-34 ~]# lvcreate -L 200G -c 256 --sharedstore  mikulas -s
> > /dev/vg00/lv_test
> >
> >   *WARNING: Unrecognised segment type multisnapshot*
> >
> > *  Cannot update volume group vg00 with unknown segments in it!*
> >
> > [root@new-host-34 ~]# lvscan
> >
> > ACTIVE         '/dev/vg00/lv_test' [100.00 GiB] inherit
> >
> >   inactive          '/dev/vg00/lv_test-shared' [200.00 GiB] inherit
> >
> > [root@new-host-34 ~]# lvcreate -s -n lv_test_ss1 /dev/vg00/lv_test
> >
> >   *Unable to create new logical volume with no extents*
> >
> >
> >
> >
> >
> > The dm modules in the system:
> >
> >
> >
> > [root@new-host-34 LVM2.2.02.64]# lsmod |grep dm
> > dm_snapshot            25583  0
> > dm_store_daniel        11304  0
> > dm_store_mikulas       43265  0
> > dm_multisnapshot       20276  2 dm_store_daniel,dm_store_mikulas
> > dm_mirror              11564  0
> > dm_multipath           14594  0
> > scsi_dh                 5480  1 dm_multipath
> > dm_region_hash          8233  1 dm_mirror
> > dm_log                  8158  2 dm_mirror,dm_region_hash
> > dm_mod                 58855  9 dm_snapshot,*
> > dm_store_daniel,dm_store_mikulas,dm_multisnapshot*
> > ,dm_mirror,dm_multipath,dm_log
> >
> >
> >
> >
> >
> >         I just want to use the multisnap by LVM2 command. But I don't know
> > is there any document about HOW-TO?
> >
> >         Thank you very much.
> >
> >
> >
> >
> >
> >
> >
> > Best regards,
> >
> > Busby
> >
> 

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Re: how to load dm-multisnapshot [with LVM patch]

[Busby]

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Hi ,
                  I have done as Mikulas said, and it is OK now..
                  My autoconf version seems to be low and I install the
higher one, and it is OK.
                  Thank you.

Best regards,
Busby


2010/5/26 Mikulas Patocka <mpatocka@redhat.com>

> On Wed, 26 May 2010, Busby wrote:
>
> > Hi,
> >      I have debug the lvm2.02.64 (with the shared-snapshot patches).
> >      In the last email I mentioned the 'Cannot update volume group vg00
> with
> > unknown segments in it!'
> >      The debug mesg: " vg_has_unknown_segments  function: snapshot0 has
> > unknown seg."
> >       I don't know when the snapshot0 has been created?why its segtype
> > unkown?
> >      Hope for your help.
> >      Thank you.
> >
> > Best regards,
> > Busby
>
> Hi
>
> I think that you didn't run aclocal and autoconf before ./configure and
> make. So the multisnapshot module wasn't compiled in.
>
> Do make distclean, then aclocal, autoconf, ./configure, make
>
> Mikulas
>
> > 在 2010年5月24日 下午5:04，Busby <chaimvy@gmail.com>写道：
> >
> > > Hi All,
> > >
> > > I get the patches from:
> > > Linux kernel 2.6.34 patch:
> > > http://people.redhat.com/mpatocka/patches/kernel/new-snapshots/r19/
> > >
> > > LVM2-2.02.64 patch:
> > > http://people.redhat.com/msnitzer/patches/multisnap/lvm2/LVM2-2.02.64/
> > >
> > >
> > >
> > > but when I used it, the segment type can not find, can anyone help me?
> > >
> > >
> > >
> > > [root@new-host-34 ~]# pvcreate /dev/sd[bcdef]
> > >
> > > [root@new-host-34 ~]# vgcreate vg00 /dev/sd[bcdef]
> > >
> > > [root@new-host-34 ~]# lvcreate -L 100G -n lv_test /dev/vg00
> > >
> > > [root@new-host-34 ~]# lvcreate -L 200G -c 256 --sharedstore  mikulas
> -s
> > > /dev/vg00/lv_test
> > >
> > >   *WARNING: Unrecognised segment type multisnapshot*
> > >
> > > *  Cannot update volume group vg00 with unknown segments in it!*
> > >
> > > [root@new-host-34 ~]# lvscan
> > >
> > > ACTIVE         '/dev/vg00/lv_test' [100.00 GiB] inherit
> > >
> > >   inactive          '/dev/vg00/lv_test-shared' [200.00 GiB] inherit
> > >
> > > [root@new-host-34 ~]# lvcreate -s -n lv_test_ss1 /dev/vg00/lv_test
> > >
> > >   *Unable to create new logical volume with no extents*
> > >
> > >
> > >
> > >
> > >
> > > The dm modules in the system:
> > >
> > >
> > >
> > > [root@new-host-34 LVM2.2.02.64]# lsmod |grep dm
> > > dm_snapshot            25583  0
> > > dm_store_daniel        11304  0
> > > dm_store_mikulas       43265  0
> > > dm_multisnapshot       20276  2 dm_store_daniel,dm_store_mikulas
> > > dm_mirror              11564  0
> > > dm_multipath           14594  0
> > > scsi_dh                 5480  1 dm_multipath
> > > dm_region_hash          8233  1 dm_mirror
> > > dm_log                  8158  2 dm_mirror,dm_region_hash
> > > dm_mod                 58855  9 dm_snapshot,*
> > > dm_store_daniel,dm_store_mikulas,dm_multisnapshot*
> > > ,dm_mirror,dm_multipath,dm_log
> > >
> > >
> > >
> > >
> > >
> > >         I just want to use the multisnap by LVM2 command. But I don't
> know
> > > is there any document about HOW-TO?
> > >
> > >         Thank you very much.
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > Best regards,
> > >
> > > Busby
> > >
> >
>

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