[Lustre-discuss] basic dump question for Lustre MDT

[Daire Byrne]

Megan,

I have not used dump to do this before but I would have thought that you would then need to "resize" the filesystem after restoring to the larger disk. I have had limited success when doing that with ext3 in the past. There was a recent email on this list suggesting that the latest "rsync" versions can successfully copy over the EAs from one ldiskfs formatted disk to another. I would personally favor this approach. I believe the manual covers how to format an MDS disk manually using mkfs.

Daire

----- "Ms. Megan Larko" <dobsonunit at gmail.com> wrote:

> Greetings,
> 
> I am again going to try to backup my MDTs and restore them on newer
> larger disks.  Ch. 15 of the Lustre manual suggests using
> getfattr/setfattr and tar command.  At the Lustre User Group conf, it
> was suggested I use the linux dump and restore commands in place of
> tar.   So I would still umount MDT from its -t lustre active status
> and remount the MDT -t ldiskfs /mnt/mds to run the getfattr command.
> In place of tar I would like to try dump.   Will dump work with the
> mount type of ldiskfs?  The man for dump does not indicate this but
> then again the man page is general usage, not Lustre.  My goal is to
> take the attributes and dumpfile of the MDT and restore them
> (setfattr
> and the restore command) onto newer larger disks.
> 
> Thank you for the info.
> 
> megan
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