topic Re: snapshot in Operating System - HP-UX

snapshot

Bedare Nikhil — Wed, 09 Dec 2009 09:50:03 GMT

Hi,
How to create a snapshot of a volume using HP LVM ?
any help is really appreciated.

Thanks

Re: snapshot

Ranveer — Wed, 09 Dec 2009 10:57:37 GMT

Seems snapshot of LVM not available but Almost same functionality can be achieved by using "lvsplit" command.
The lvsplit command splits a mirrored lv into two logical volumes.The second volume contains the copy of data. You can mount the second volume & can use it for backup etc without touching your original data.

#man lvsplit will give more info

Regards
Ranveer

Re: snapshot

Michal Kapalka (mikap) — Wed, 09 Dec 2009 11:07:32 GMT

hi,

as "ranveer" alredy mentioned, you could use lvsplit, but the system will be without mirroring, during the tame of lvsplit and the time for sync with lvmerge.

and also its very importatnt for lvmerge which is LVOL master and wich is a copy.

mikap

Re: snapshot

VK2COT — Wed, 09 Dec 2009 20:51:05 GMT

Hello,

"snapof" option is a feature of OnlineJFS
(vxfs) file systems and works well under
LVM, VxVM, or even whole disks for file
systems.

If you have OnlineJFS installed,
it is a simple as:

# mount -F vxfs -o snapof=/myfilesystem /dev/myvg/mylvol /snapmyfs

Regards,

VK2COT

Re: snapshot

James R. Ferguson — Wed, 09 Dec 2009 21:04:40 GMT

Hi:

The procedure for VxFS (JFS) snapshots is documented here:

http://docs.hp.com/en/5992-6576/ch03s06.html#bajcggcd

Regards!

...JRF...