I don't think you can ro mount the fs while it's in use, hence the suggestion of the e2fs dump.
Stephen ----- "Stuart Midgley" <[EMAIL PROTECTED]> wrote: > Yes, I had seen the issue of extended attributes and that doesn't > worry me that much. It won't be much information for the last copy > of data. > > I guess my query comes down to how safe it is to mount the raw lustre > > partition ro while it is still being served... and then to copy data > > off it. I appreciate there will be a performance penalty. > > Stu. > > > On 06/06/2007, at 4:52 PM, Stephen Willey wrote: > > > I inquired about this a while back and got the following: > > > > "In order to minimize downtime, it would also be possible to use > > the ext2 > > "dump" program in order to do device-level backups (including the > > extended attributes) while the filesystem is in use. This backup > > would > > not be 100% coherent with the actual filesystem. > > > > The problem with running rsync to do the final sync step is that > this > > has no understanding of extended attributes. For current (1.4.8) > > versions of Lustre the OST EAs are not required for the correct > > operation of the filesystem (they are redundant information to > assist > > recovery in case of corruption), but in the future that may not be > > > true." > > > > The (offline) method of migrating an OST is here: https:// > > bugzilla.clusterfs.com/show_bug.cgi?id=4633 but after reading the > > above I guess you should probably run the getfattr/setfattr > > commands on the OSTs as well as the MDT. > > > > Stephen > > -- > Dr Stuart Midgley > [EMAIL PROTECTED] -- Stephen Willey Senior Systems Engineer Framestore CFC +44 (0)207 344 8000 http://www.framestore-cfc.com _______________________________________________ Lustre-discuss mailing list [email protected] https://mail.clusterfs.com/mailman/listinfo/lustre-discuss
