If you want to do real quick dump of a volume:
- make it a LVM volume
- take a LVM backup -s(napshot) to a temporary snapshot volume
it's only a definition (sort of) and takes only a few seconds, you can
continue work
during this, no interrupt
- mount the snapshot volume
- do your normal backup from this snapshot volume, it will be a backup
consistent in time
from the time the snapshot backup was defined.
- when backup complete, remove the snapshot volume
If you also want a real quick restore:
- at the same time you are taking that backup, also do a real copy from
snapshot volume
to an identical volume/disk, just with another mount point.
- when this copy is finished, you can restore to this point in time just by
remount.
takes only a few seconds.
Cordialement / Vriendelijke Groeten / Best Regards / Med Vänliga Hälsningar
Tore Agblad
Volvo Information Technology
Infrastructure Mainframe Design & Development
SE-405 08, Gothenburg Sweden
E-mail: [email protected]
http://www.volvo.com/volvoit/global/en-gb/
________________________________________
From: Linux on 390 Port [[email protected]] On Behalf Of Marcy Cortes
[[email protected]]
Sent: Monday, March 29, 2010 22:46
To: [email protected]
Subject: Dump volume compatibilty
While VMDUMP is handy because it is "always there" under VM, it is so darn
slow that it makes its use really unacceptable for large virtual machines (more
than 2 hours to dump an 8G virtual machine). Even for a small Linux system of
800M, it's 22 minutes (and that's with a very robust DASD subsystem, not old
junk ;)
Fortunately, making one with "zipl -d" works well and is fast (3 minutes for 8G
- what the heck is vmdump doing for 2 hours !!??!!)
My question is can a dump volume created with "zipl -d"from s390-tools 1.5.6 on
sles9 be used to dump a sles 10 (s390-tools 1.6.3) system?
i.e. can I get away with just one?
Or do I need one for each?
Or if I can't use the sles 9 one on sles 10, can I use a sles 10 created one
for sles 9 ?
Inquiring minds wanna know,
Marcy
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