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