So let's see, Linux is a multi-tasking OS and it runs several "processes" simultaneously.
VM is a multi-tasking OS and it runs several "processes" simultaneously, only they are independent "virtual machines" running a shared CMS NSS. Tell me again why Linux is somehow "better"? They all share virtual storage, they all share the main processor, they all have the ability to be started/stopped independent of the OS (kill on Linux, terminating the Virtual Machine application via a 'shutdown' command, IPL or FORCE on VM). Oh yeah, SSL is native on Linux, and was poorly added on to VM's TCPIP by inserting Linux into the process. Sorry if I don't agree that this is a good idea, but there is an old saying that "If you only have a hammer, you treat everything as a nail". Linux is an excellent "hammer", but VM is one helluva power-driver - and has been for over 40 years. -Mike -----Original Message----- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Mark Post Sent: Sunday, October 07, 2007 11:26 AM To: [email protected] Subject: Re: Linux guest to manage zVM? >>> On Fri, Oct 5, 2007 at 2:21 PM, in message <[EMAIL PROTECTED]>, "Fargusson.Alan" <[EMAIL PROTECTED]> wrote: > I suspect that Linux is a bit heavy to do all the things that CMS > does. And > I think CMS is used to install Linux (I might be wrong). > > It would be nice if Linux could be used to do more VM work. Heavy, being somewhat relative. Before the use of OSA interfaces (virtual or real) and the huge increase in "required" rpm packages I was routinely running SLES systems in about 32M of virtual storage. Given the assumption that you would only need one Linux versus several CMS VMs, it's fairly easy to buy back the virtual storage. CPU usage, perhaps not so easy, but not so bad either. And then, you would probably want to have two Linux systems up and running in an active-active cluster to avoid a single point of failure. As MacK pointed out, rearchitecting and recoding all the infrastructure products that currently run on CMS would be a huge undertaking for a lot of companies. Not likely in our (professional) lifetime. Still, it would be nice to have things like RSCS, DIRMAINT, etc. all running in the same VM, as opposed to being spread all over the place. I just wouldn't want to be the one in charge of even the IBM piece of such a project. Mark Post ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
