[linux-lvm] Can read/write snapshots be modified while the original is being modied

[Stuart D. Gathman]

On Mon, 22 Mar 2010, Stuart D. Gathman wrote:

> On Mon, 22 Mar 2010, Hyatt, Gilbert wrote:
> 
> > We are tried to do patch testing.  
> > We want to snapshot an OS, continue to run on the original OS, while
> > installing patches and testing the snapshot.
> 
> I do that all the time.  It works fine.

A word to the wise.  Be sure and disable stuff like EDI or web service clients
that might modify other production machines.  I forgot to do that once.
Took the longest time to figure out why many of our production customs entry
responses were disappearing - as if someone had our password and was stealing
them...


Another approach I use is to restore a backup to a test VM.  This tests
the backup as well.  This is especially comforting when you use a
remote backup server to run the test VM.

-- 
	      Stuart D. Gathman <stuart at bmsi.com>
    Business Management Systems Inc.  Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flammis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.