Re: [linux-lvm] New LVM2 release 2.02.89: Thinly-provisioned logical volumes

["Busby.Cheung" <chaimvy@163.com>]

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Hi Alasdair,

             The kernel mesg log "failed to resize data device" while use dmsetup CMDs to create pool will be ok.   

use LVM2 cmd mesgs:
---------------------------

[root@host2 ~]# pvs
  Ignoring too small pv_min_size 512KB, using default 2048KB.
  PV         VG         Fmt  Attr PSize   PFree 
  /dev/sda2  VolGroup00 lvm2 a--  931.41G      0
  /dev/sdg   vg_pool    lvm2 a--  931.51G 931.51G
  /dev/sdl   vg_pool    lvm2 a--  931.51G 931.51G
[root@host2 ~]# vgs
  Ignoring too small pv_min_size 512KB, using default 2048KB.
  VG         #PV #LV #SN Attr   VSize   VFree 
  VolGroup00   1   2   0 wz--n- 931.41G      0
  vg_pool      2   0   0 wz--n-   1.82T   1.82T
[root@host2 ~]# lvcreate -L65G -T vg_pool/pool
  Ignoring too small pv_min_size 512KB, using default 2048KB.
  Rounding up size to full physical extent 4.00 MB
  device-mapper: resume ioctl on  failed: Cannot allocate memory
  Unable to resume vg_pool-pool-tpool (253:12)
  Aborting. Failed to activate thin pool.
[root@host2 ~]# dmesg
device-mapper: space map checker: Loading debug space map from disk.  This may take some time
device-mapper: space map checker: Load complete
device-mapper: thin: failed to resize data device
[root@host2 ~]# cat /var/log/messages
Feb  2 09:14:45 host2 kernel: device-mapper: space map checker: Loading debug space map from disk.  This may take some time
Feb  2 09:14:45 host2 kernel: device-mapper: space map checker: Load complete
Feb  2 09:14:45 host2 kernel: device-mapper: thin: failed to resize data device

 --------------------------
use dmsetup cmd:

[root@host2 ~]# lvcreate -n metadata_lv -L40M  vg_pool
  Ignoring too small pv_min_size 512KB, using default 2048KB.
  Logical volume "metadata_lv" created
[root@host2 ~]# lvcreate -n data_lv -L300G vg_pool
  Ignoring too small pv_min_size 512KB, using default 2048KB.
  Logical volume "data_lv" created
[root@host2 ~]# dmsetup create pool --table "0 209715200 thin-pool /dev/vg_pool/metadata_lv /dev/vg_pool/data_lv  1024  20000"
[root@host2 ~]# dmsetup status
vg_pool-metadata_lv: 0 81920 linear
VolGroup00-LogVol01: 0 24510464 linear
vg_pool-pool-tpool: 0 136314880 thin-pool 0 76/1024 0/0 -
vg_pool-pool_tdata: 0 136314880 linear
VolGroup00-LogVol00: 0 1928790016 linear
vg_pool-pool_tmeta: 0 8192 linear
pool: 0 209715200 thin-pool 0 21/10240 0/204800 -
vg_pool-data_lv: 0 629145600 linear

[root@host2 ~]# dmesg
device-mapper: space map checker: Loading debug space map from disk.  This may take some time
device-mapper: space map checker: Load complete
device-mapper: thin: failed to resize data device
device-mapper: space map checker: Loading debug space map from disk.  This may take some time
device-mapper: space map checker: Load complete
device-mapper: space map checker: free block counts differ, checker 1020, sm-disk:948
device-mapper: space map checker: free block counts differ, checker 10236, sm-disk:10219

 
 
Best regards,
Busby


 > -----原始邮件-----
> 发件人: "Alasdair G Kergon" <agk@redhat.com>
> 发送时间: 2012年2月1日 星期三
> 收件人: "Busby.Cheung" <chaimvy@163.com>
> 抄送: "LVM general discussion and development" <linux-lvm@redhat.com>, "agk@redhat.com" <agk@redhat.com>, dm-devel@redhat.com
> 主题: Re: Re: [linux-lvm] New LVM2 release 2.02.89: Thinly-provisioned logical volumes
> 
> On Wed, Feb 01, 2012 at 04:40:19PM +0800, Busby.Cheung wrote:
> > This is the mesgs:
>  
> Can you also lookin the kernel message log and see where or not it gives any
> additional reason there?
> 
> Alasdair

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