Phil Payne
<Linux@isham-rese To: [EMAIL PROTECTED]
arch.com> cc:
Sent by: Linux on Subject: Re: [LINUX-390] The redpaper
for cloning zLinux images via VQDIO
390 Port is available
<[EMAIL PROTECTED]
IST.EDU>
09/04/2002 02:27
PM
Please respond to
Linux on 390 Port
>>>>>>>>
> 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.
<<<<<<<<
It'd be nice if the DASD boxes could have a "copy on write" feature
akin to
the Linux memory manager; This kind of technology would be
reasonable for
handling things like R/O images. Or am I confusing this with GPFS?
--------------------
John R. Campbell, Speaker to Machines (GNUrd) {813-356|697}-5322
Adsumo ergo raptus sum
IBM Certified: IBM AIX 4.3 System Administration, System Support
