HSM Upgrade July 2014
This is the proposed plan, small changes may be needed
Move from x4270 to x4-2l
Moving to new meta data server should result in more file system isolation and higher performance (more/faster dedicates SSD space).
Test case A4
- perform final samfsdump
- umount A4 everywhere
- zfs send/receive meta/A4 to new MDS
- create proper mcf for new MDS
- mount A4 on new MDS
- check if all clients will accept new MDS
Full scale change
- umount FS on all QFS clients
- perform final samfsdump on all - allow 12-15 hours for that
- umount all FS on old MDS
- zfs send/receive all old MDS locla meta zvols to new MDS
- re-create mcf on new MDS including 6780 based FS
- mount all FS on new MDS
- mount all FS on QFS clients
Later
Only after moving to new MDS we will start shuffling use directories around
What about
- upgrade firmware on DDN
- upgrade to condor 7.2
- reboot all nodes to install new kernel
- change HSM mount options, qfs clients will only mount with defaults, head nodes will be mounted from MDS again
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CarstenAulbert - 26 Jun 2014