I forgot to paste the link I referenced to perform backup: here it is: http://wiki.lustre.org/manual/LustreManual18_HTML/BackupAndRestore.html

Any thoughts on this will be very helpful!

Thank you,

Amit

From: hpdd-discuss-bounces@lists.01.org [mailto:hpdd-discuss-bounces@lists.01.org] On Behalf Of Kumar, Amit
Sent: Monday, April 08, 2013 12:47 PM
To: HPDD-discuss@lists.01.org (HPDD-discuss@ml01.01.org)
Subject: [HPDD-discuss] Lustre Disk to Disk MDS Backup Question

Dear All,

“Version 1.8”

We have both MGS & MDT mounted on two different block devices.

Now I would like to perform a disk to disk backup of both of these block devices to another set of block devices.

Although this link tells me how to perform that. There are some missing things that I want to understand before I can perform this backup

We have two devices /dev/dm-1 & /dev/dm-0 mounted as /mgs and /mdt respectively.

Now I have two more devices /dev/dm-2 & /dev/dm-3 which I want to mount it as /mgs-backup and /mdt-backup and then perform the disk to disk backup. Because we are not backing up any of the metadata right now.

Here is where I get lost: when I want to make the lustre file system it asked me if the device is going to be an mgs or mdt or it will be combined. Now that I already have an /mgs and /mdt partition on this node what will happen if I make new block device to be an mgs and mdt partition, will this conflict with the existing ??????

Or can I just make the new devices just an ext3 partition and still be able to make a disk to disk copy of meta data that I can restore when needed.

Please advise.

Best Regards

Amit H. Kumar