topic Re: Sync two mount points in the same system in Operating System - HP-UX

Sync two mount points in the same system

Srinikalyan — Wed, 28 Oct 2009 06:51:43 GMT

Hi,

HP-UX 11iv2
I am looking for a solution to keep two mount points in the same system in sync with each other.
My actual requirement is I need to move one mount point (1TB) to another volume group (for backup purpose)but without an outage (lot of updates happening currently)on the current mount point. After some point in time we will have a minimum outage and use the new MP.
Is it possible by any best method?

Note: I am not looking for BCV solution here.

Thanks,
Srini

Re: Sync two mount points in the same system

smatador — Wed, 28 Oct 2009 06:55:58 GMT

Hi,
A solution is to use rsync
http://hpux.connect.org.uk/hppd/hpux/Networking/Admin/rsync-3.0.6/
Hope it helps

Re: Sync two mount points in the same system

Michal Kapalka (mikap) — Wed, 28 Oct 2009 06:57:29 GMT

hi,

if the mount points are based on LVM and are mirrode on LVM, you could split the mirror and mount it under other mount points, and sync.

check this thread :

http://forums11.itrc.hp.com/service/forums/questionanswer.do?admit=109447626+1256716597384+28353475&threadId=223050

mikap

Re: Sync two mount points in the same system

Kapil Jha — Wed, 28 Oct 2009 08:29:58 GMT

I too think mirroring at LV level is better than rsync.
And whwnever you want split the mirror and mount it on other VG simple :)

BR,
Kapil+

Re: Sync two mount points in the same system

James R. Ferguson — Wed, 28 Oct 2009 11:13:22 GMT

Hi Srini:

Have you considered using a JFS snapshot for backup? See:

http://docs.hp.com/en/5992-4616/ch03s04.html#bajcggcd

Regards!

...JRF...

Re: Sync two mount points in the same system

Steven E. Protter — Wed, 28 Oct 2009 12:23:46 GMT

Shalom Srini,

Online JFS, described above has a command for splitting a file system and freezing it for update.

This product costs money.

Best method is the one that works for you.

rsync will not work for databases. It will work well for incidvidual files.

mirror/ux also costs and takes time to rebuild mirrors after a split.

SEP

Re: Sync two mount points in the same system

Srinikalyan — Mon, 02 Nov 2009 07:20:23 GMT

I hope this rsync command will be run on different times where the updated changed done on source directory will be copied to dest directory and it will not be replicated continuosly. Am I correct?

Thanks,
Srini