[dm-devel] how to load dm-multisnapshot [with LVM patch]

[Busby]

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 at 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 at 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 at new-host-34 ~]# pvcreate /dev/sd[bcdef]
> > >
> > > [root at new-host-34 ~]# vgcreate vg00 /dev/sd[bcdef]
> > >
> > > [root at new-host-34 ~]# lvcreate -L 100G -n lv_test /dev/vg00
> > >
> > > [root at 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 at new-host-34 ~]# lvscan
> > >
> > > ACTIVE         '/dev/vg00/lv_test' [100.00 GiB] inherit
> > >
> > >   inactive          '/dev/vg00/lv_test-shared' [200.00 GiB] inherit
> > >
> > > [root at 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 at 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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