Discussion:
[linux-lvm] Issue in creating thinpool when used different pool metadatasize
Rahul Hinduja
2014-04-16 13:28:47 UTC
Permalink
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

[***@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
[***@rahul ~]#
[***@rahul ~]#




Case 2: poolmetadatasize as 5m

#script to create thinpool with poolmetadatasize 5m

[***@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
[***@rahul ~]#
[***@rahul ~]#



#Creation Success

[***@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
[***@rahul ~]#


Please find the attachment with detailed outputs of different lv commands

Thanks,
Rahul
Rahul Hinduja
2014-04-16 13:31:47 UTC
Permalink
----- Original Message -----
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
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
#Creation Fails

[***@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.
Case 2: poolmetadatasize as 5m
#script to create thinpool with poolmetadatasize 5m
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
#Creation Success
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
Please find the attachment with detailed outputs of different lv commands
Thanks,
Rahul
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