Brian J. Murrell wrote: > On Mon, 2009-01-19 at 22:46 -0600, Alex Kulyavtsev wrote: >> Hi, >> what is the right way to backup MDT ? > > I think this is covered in the operations manual. >
The manual does indeed cover backups: http://manual.lustre.org/manual/LustreManual16_HTML/BackupAndRestore.html It includes this step: > 3. Back up the EAs, run: > getfattr -R -d -m '.*' -P . > ea.bak > Is that necessary for newer versions of tar that support the "-xattrs" option? From the man page (I have GNU tar 1.15.1): --xattrs this option causes tar to store each file's extended attributes in the archive. This option also enables --acls and--selinux if they haven't been set already, due to the fact that the data for those are stored in special xattrs. Also, AFAIK, cpio will archive extended attributes as well. Is either 'tar --xattrs' or 'cpio' sufficient for capturing all the Lustre MDT information? Would that eliminate the need for the 'getfattr' step, and cut the time for backup almost in half by requiring only one pass through the filesystem? Thanks, Nathan _______________________________________________ Lustre-discuss mailing list [email protected] http://lists.lustre.org/mailman/listinfo/lustre-discuss
