[Users] Deleting a snapshot of eight disks took more than fifteen minutes
Is it reasonable? I created snapshot1 and snapshot2 for the eight disks and then tried to delete snapshot2. And it took 15+ minutes to finish the operation. Here is the disk list: my-vm1_Disk1 40 GB 3 GB data Thin Provision VirtIO OK 2012-Jun-27, 13:24:01 my-vm1_Disk2 10 GB 10 GB data Preallocated VirtIO OK 2012-Jun-25, 23:19:00 my-vm1_Disk3 4 GB < 1 GB data Thin Provision VirtIO OK 2012-Jun-26, 23:27:40 my-vm1_Disk4 3 GB 3 GB data Thin Provision VirtIO OK 2012-Jun-27, 13:24:01 my-vm1_Disk5 3 GB 3 GB data Thin Provision VirtIO OK 2012-Jun-27, 13:24:01 my-vm1_Disk6 4 GB 4 GB data Thin Provision VirtIO OK 2012-Jun-27, 13:24:02 my-vm1_Disk7 5 GB 5 GB data Thin Provision VirtIO OK 2012-Jun-27, 13:24:02 my-vm1_Disk8 6 GB 6 GB data Thin Provision VirtIO OK 2012-Jun-27, 13:24:02 -- Shu Ming <shuming@linux.vnet.ibm.com> IBM China Systems and Technology Laboratory
It depends. Block device or NFS? Did you had data on the deleted snapshot? Did you had wipe after delete marked or not? Did the snapshots contain data? Did you delete a snapshot or did you revert to a snapshot? ----- Original Message -----
From: "Shu Ming" <shuming@linux.vnet.ibm.com> To: "users@oVirt.org" <users@ovirt.org> Sent: Tuesday, July 3, 2012 11:48:35 AM Subject: [Users] Deleting a snapshot of eight disks took more than fifteen minutes
Is it reasonable? I created snapshot1 and snapshot2 for the eight disks and then tried to delete snapshot2. And it took 15+ minutes to finish the operation.
Here is the disk list:
my-vm1_Disk1 40 GB 3 GB data Thin Provision VirtIO OK 2012-Jun-27, 13:24:01 my-vm1_Disk2 10 GB 10 GB data Preallocated VirtIO OK 2012-Jun-25, 23:19:00 my-vm1_Disk3 4 GB < 1 GB data Thin Provision VirtIO OK 2012-Jun-26, 23:27:40 my-vm1_Disk4 3 GB 3 GB data Thin Provision VirtIO OK 2012-Jun-27, 13:24:01 my-vm1_Disk5 3 GB 3 GB data Thin Provision VirtIO OK 2012-Jun-27, 13:24:01 my-vm1_Disk6 4 GB 4 GB data Thin Provision VirtIO OK 2012-Jun-27, 13:24:02 my-vm1_Disk7 5 GB 5 GB data Thin Provision VirtIO OK 2012-Jun-27, 13:24:02 my-vm1_Disk8 6 GB 6 GB data Thin Provision VirtIO OK 2012-Jun-27, 13:24:02
-- Shu Ming <shuming@linux.vnet.ibm.com> IBM China Systems and Technology Laboratory
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
On 2012-7-3 17:01, Simon Grinberg wrote:
It depends.
Block device or NFS?
NFS
Did you had data on the deleted snapshot? Got some. Not too much
Did you had wipe after delete marked or not? No.
Did the snapshots contain data? Got some. Not too much
Did you delete a snapshot or did you revert to a snapshot? Just deleting a snapshot.
----- Original Message -----
From: "Shu Ming" <shuming@linux.vnet.ibm.com> To: "users@oVirt.org" <users@ovirt.org> Sent: Tuesday, July 3, 2012 11:48:35 AM Subject: [Users] Deleting a snapshot of eight disks took more than fifteen minutes
Is it reasonable? I created snapshot1 and snapshot2 for the eight disks and then tried to delete snapshot2. And it took 15+ minutes to finish the operation.
Here is the disk list:
my-vm1_Disk1 40 GB 3 GB data Thin Provision VirtIO OK 2012-Jun-27, 13:24:01 my-vm1_Disk2 10 GB 10 GB data Preallocated VirtIO OK 2012-Jun-25, 23:19:00 my-vm1_Disk3 4 GB < 1 GB data Thin Provision VirtIO OK 2012-Jun-26, 23:27:40 my-vm1_Disk4 3 GB 3 GB data Thin Provision VirtIO OK 2012-Jun-27, 13:24:01 my-vm1_Disk5 3 GB 3 GB data Thin Provision VirtIO OK 2012-Jun-27, 13:24:01 my-vm1_Disk6 4 GB 4 GB data Thin Provision VirtIO OK 2012-Jun-27, 13:24:02 my-vm1_Disk7 5 GB 5 GB data Thin Provision VirtIO OK 2012-Jun-27, 13:24:02 my-vm1_Disk8 6 GB 6 GB data Thin Provision VirtIO OK 2012-Jun-27, 13:24:02
-- Shu Ming <shuming@linux.vnet.ibm.com> IBM China Systems and Technology Laboratory
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
-- Shu Ming <shuming@linux.vnet.ibm.com> IBM China Systems and Technology Laboratory
----- Original Message -----
From: "Shu Ming" <shuming@linux.vnet.ibm.com> To: "Simon Grinberg" <simon@redhat.com> Cc: "users@oVirt.org" <users@ovirt.org> Sent: Tuesday, July 3, 2012 12:37:31 PM Subject: Re: [Users] Deleting a snapshot of eight disks took more than fifteen minutes
On 2012-7-3 17:01, Simon Grinberg wrote:
It depends.
Block device or NFS?
NFS
Did you had data on the deleted snapshot? Got some. Not too much
Did you had wipe after delete marked or not? No.
Did the snapshots contain data? Got some. Not too much
Did you delete a snapshot or did you revert to a snapshot? Just deleting a snapshot.
Considering that: 1. You had data on the snapshots 2. You've deleted snapshots 3. You have 8 disks Then is sounds reasonable. Deleting a snapshot is merging two files into one. For the sake of roll back it is done by actually copying the first, writing the changes of the second on top and then inserting this new file into the snapshots chain. This is time consuming depending on your storage performance and the amount of data in the snapshots. And you do it 8 times, one per disk.
----- Original Message -----
From: "Shu Ming" <shuming@linux.vnet.ibm.com> To: "users@oVirt.org" <users@ovirt.org> Sent: Tuesday, July 3, 2012 11:48:35 AM Subject: [Users] Deleting a snapshot of eight disks took more than fifteen minutes
Is it reasonable? I created snapshot1 and snapshot2 for the eight disks and then tried to delete snapshot2. And it took 15+ minutes to finish the operation.
Here is the disk list:
my-vm1_Disk1 40 GB 3 GB data Thin Provision VirtIO OK 2012-Jun-27, 13:24:01 my-vm1_Disk2 10 GB 10 GB data Preallocated VirtIO OK 2012-Jun-25, 23:19:00 my-vm1_Disk3 4 GB < 1 GB data Thin Provision VirtIO OK 2012-Jun-26, 23:27:40 my-vm1_Disk4 3 GB 3 GB data Thin Provision VirtIO OK 2012-Jun-27, 13:24:01 my-vm1_Disk5 3 GB 3 GB data Thin Provision VirtIO OK 2012-Jun-27, 13:24:01 my-vm1_Disk6 4 GB 4 GB data Thin Provision VirtIO OK 2012-Jun-27, 13:24:02 my-vm1_Disk7 5 GB 5 GB data Thin Provision VirtIO OK 2012-Jun-27, 13:24:02 my-vm1_Disk8 6 GB 6 GB data Thin Provision VirtIO OK 2012-Jun-27, 13:24:02
-- Shu Ming <shuming@linux.vnet.ibm.com> IBM China Systems and Technology Laboratory
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
-- Shu Ming <shuming@linux.vnet.ibm.com> IBM China Systems and Technology Laboratory
participants (2)
-
Shu Ming -
Simon Grinberg