Phil,
I did look into using Flashcopy on the SHARK and decided to use DDR
instead. I think you can only use flashcopy to copy data within the same
RAID array. The DASD I used (>100 3390-3s) in my demo are on few RADI
arrays. Currently I do not have any plan to change my cloning example to
use flashcopy.
Chong
Tung-Sing Chong
Software Engineer
zSeries Software Development
Endicott, NY
T/l : 852-5342 Outside Phone: 607-752-5342
E-mail: [EMAIL PROTECTED]
Phil Payne <[EMAIL PROTECTED]>@VM.MARIST.EDU> on 09/04/2002 02:27:33
PM
Please respond to Linux on 390 Port <[EMAIL PROTECTED]>
Sent by: Linux on 390 Port <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
cc:
Subject: Re: The redpaper for cloning zLinux images via VQDIO is
available
> To Phil: The amount of time to clone is highly dependent (naturally) on
> the DASD subsystem. Different technologies can and do yield drastically
> different times. So, asking "what's the fastest" is different than
> "what's the fastest Chong achieved using his evironment and techniques".
Yes, but they were two seperate questions:
a) How long does it take at present - answered.
b) Are there plans to support Snapshot/Flashcopy/ShadowImage copying?
Obviously the creation of the DASD images is currently the largest
component, by an order of
magnitude. Exploitation of the near-instantaneous copy facilities
supported by current DASD
subsystems would convert this 'quick' process into one that coul dbe used,
e.g., even on a
transaction-by-transaction basis. A completely fresh Linux system for each
transaction?
Given the length of time it takes to establish a Linux environment on a
discrete server, this
kind of 'throw-away' Linux system is a powerful differentiator.
--
Phil Payne
http://www.isham-research.com
+44 7785 302 803
