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тАО02-28-2008 07:20 PM
тАО02-28-2008 07:20 PM
Storage migration
Thanks in advance
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тАО02-28-2008 08:09 PM
тАО02-28-2008 08:09 PM
Re: Storage migration
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тАО02-29-2008 07:04 PM
тАО02-29-2008 07:04 PM
Re: Storage migration
pvmove only works in the same VG, and only if you set your max extents per PV higher than the current size of the disk at VG creation time. Otherwise, any volume you add will only be the size of the current max PE * max PE / PV size.
Backup and recover is an option, but means 2 copies.
If you can have both sets of LUNs presented, why not use rsync?
Using rsync -av --stats --progress --delete /source/ /dest/, the first run will take some time, and it tends to run out of memory if you do runs of > 2.5million files, but after that, it's a mirroring tool, you can continue to run it nightly and at the flip time, shut down services, one last rsync and you're done.
The --delete deletes files on the destination as they are removed from the source.
Don't run more than 2 at the same time, it spawns 3 processes per run, (monitor, source, dest).
It's in the iExpress bundle, but a newer version is available from the porting and archiving centre.
http://hpux.ece.ualberta.ca/hppd/hpux/Networking/Admin/rsync-2.6.9/
If it's a database, you're out of luck either way.
By the way, this is what I'm doing for 4TB of file services. The largest shared area is 3.7million files and 1.3TB in size.
I've broken the rsync into groups and it's scripted and cron'ed to run nightly for updates. For this size, it take about 37 minutes per night to do a refresh job, including data copies. For busy days, it peaks at an hour.
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тАО03-02-2008 12:15 AM
тАО03-02-2008 12:15 AM
Re: Storage migration
May be it's a good idea to assign new LUNs to the same system, add them in the same volume group, crate PVG over new luns and make mirror of existing LV to new PVG, once ready , you can
reduce mirrors with old Luns and take out them out of VG.
That's all, even you can do it on-line wihtout outage.
Hope this help.
If you need more details, please ask.
Cheers
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тАО03-02-2008 11:02 PM
тАО03-02-2008 11:02 PM
Re: Storage migration
You don't actually need the PVG's that he/she mentions, just mirror LV's and then break the mirror afterwards. I did this on productions systems online.