[linux-lvm] Issue in creating thinpool when used different pool metadatasize

[Rahul Hinduja]

----- Original Message -----
> From: "Rahul Hinduja" <rhinduja at redhat.com>
> To: linux-lvm at redhat.com
> Sent: Wednesday, April 16, 2014 6:58:47 PM
> Subject: Issue in creating thinpool when used different pool metadatasize
> 
> Hello All,
> 
> This might be some basic mistake I would be doing with respect to different
> poolmetadata size.
> 
> When I am trying to create thinpool with poolmetadatasize as 4m it fails but
> similar is successful when I try to create with 5m. Default poolmetadatasize
> can be 2m to 16g so I am not sure what is error I am enforcing it to fail.
> 
> Kindly help me out with this issue.
> 
> 
> Case 1: poolmetadatasize as 4m
> 
> #script to create thinpool with poolmetadatasize 4m
> 
> [root at rahul ~]# cat temp
> pvcreate /dev/vdb
> pvcreate /dev/vdc
> pvcreate /dev/vdd
> pvcreate /dev/vde
>  
> vgcreate snap_vg0 /dev/vdb /dev/vdc /dev/vdd /dev/vde
> lvcreate -L 90G --poolmetadatasize 4m -T /dev/snap_vg0/snap_thin_pool0
> #lvcreate -L 90G -T /dev/snap_vg0/snap_thin_pool0
> lvcreate -V90G -T /dev/snap_vg0/snap_thin_pool0 -n snap_thin_vol0
> [root at rahul ~]#
> [root at rahul ~]#

#Creation Fails

[root at rahul ~]# ./temp 
  Physical volume "/dev/vdb" successfully created
  Physical volume "/dev/vdc" successfully created
  Physical volume "/dev/vdd" successfully created
  Physical volume "/dev/vde" successfully created
  Volume group "snap_vg0" successfully created
  Logical volume "lvol0" created
  device-mapper: reload ioctl on  failed: Invalid argument
  Failed to suspend pool snap_thin_pool0.
  Thin pool snap_thin_pool0 not found in Volume group snap_vg0.
[root at rahul ~]#


> 
> 
> 
> 
> Case 2: poolmetadatasize as 5m
> 
> #script to create thinpool with poolmetadatasize 5m
> 
> [root at rahul ~]# cat temp
> pvcreate /dev/vdb
> pvcreate /dev/vdc
> pvcreate /dev/vdd
> pvcreate /dev/vde
>  
> vgcreate snap_vg0 /dev/vdb /dev/vdc /dev/vdd /dev/vde
> lvcreate -L 90G --poolmetadatasize 5m -T /dev/snap_vg0/snap_thin_pool0
> #lvcreate -L 90G -T /dev/snap_vg0/snap_thin_pool0
> lvcreate -V90G -T /dev/snap_vg0/snap_thin_pool0 -n snap_thin_vol0
> [root at rahul ~]#
> [root at rahul ~]#
> 
> 
> 
> #Creation Success
> 
> [root at rahul ~]# ./temp
>   Physical volume "/dev/vdb" successfully created
>   Physical volume "/dev/vdc" successfully created
>   Physical volume "/dev/vdd" successfully created
>   Physical volume "/dev/vde" successfully created
>   Volume group "snap_vg0" successfully created
>   Rounding up size to full physical extent 8.00 MiB
>   Logical volume "lvol0" created
>   Logical volume "snap_thin_pool0" created
>   Logical volume "snap_thin_vol0" created
> [root at rahul ~]#
> 
> 
> Please find the attachment with detailed outputs of different lv commands
> 
> Thanks,
> Rahul