Hello everybody, I am currently using Lustre 1.8.5 at servers, with a SLES kernel (2.6.32.19-0.2.1-lustre.1.8.5). Before this year is over, I'll upgrade to the current Lustre Maintenance release (currently 2.4.X), but now I need to arrange a MDT moving, to other LUN in the MDS. I did a test on a MDT LVM snapshot, following the moving procedure described bellow, but I found some issues I would like to comment: 1) The backup using the tar command took very long time (20 hours), though the MDT is quite small (197 MB). So long? 2) The restored 'ldiskfs' file system is a bit smaller than the original one (about 20 MB using du -sm). Should I worry? 3) When backing up Extended attributes with the command 'getfattr' I get some errors of the type: getfattr: ./ROOT/<file path>: No such file or directory I could see that they are symbolic links using absolute paths. Can that be a problem? Finally, I got the bellow procedure from the 1.8.X Lustre manual. Any comment? ************************************************************** MDT MOVING PROCEDURE ************************************************************** ---------------------------------------------------------- - Backup procedure ---------------------------------------------------------- 1) Mount lustre as 'ldiskfs' type mount -t ldiskfs /dev/sdb /lustre/mds 2) Change to the file system mount point cd /lustre/mds 3) Backup all the file system data tar cSf /backup/mds.tar . 4) Backup Extended Attributes getfattr -R -d -m '.*' -P . > /backup/ea.bak 5) Umount the file system cd umount /lustre/mds ---------------------------------------------------------- - Restore procedure ---------------------------------------------------------- 1) Make a receiving lustre MDT mkfs.lustre --fsname=jffstg --param mdt.quota_type=ug \ --reformat --mdt --mgs /dev/sdc 2) Mount lustre as 'ldiskfs' type mount -t ldiskfs /dev/sdc /lustre/mds 3) Change to the file system mount point cd /lustre/mds 4) Restore the previous tar file tar xpSf /backup/mds.tar 5) Restore de file system Extended Attributes setfattr --restore=/backup/ea.bak 6) Remove the recovery logs rm OBJECTS/* CATALOGS -- Ramiro Alba Centre Tecnològic de Tranferència de Calor http://www.cttc.upc.edu Escola Tècnica Superior d'Enginyeries Industrial i Aeronàutica de Terrassa Colom 11, E-08222, Terrassa, Barcelona, Spain Tel: (+34) 93 739 8928 -- Aquest missatge ha estat analitzat per MailScanner a la cerca de virus i d'altres continguts perillosos, i es considera que est� net.