Re: Documentation for Linux on z Systems and KVM - new

Hi Mark, Thank you for detailed answer, but, actually, your vision is not contradicted with mine, you just confirmed that the huge jump was made in the last decade because of Linux on mainframe (in z/VM particularly). I hope that with people like you, the speed of progress won't be slow down.

Re: Documentation for Linux on z Systems and KVM - new

'The speed of progress' ?Is it not moving fast enough for you, Sergey? Perhaps we need 'dinosaur crossing' signs stamped on the z... ? I am personally not worried about slowing down the world ... I have failed even when actively trying ;-) I stay in shape running to catch up.. Scott

Re: Documentation for Linux on z Systems and KVM - new

> I stay in shape running to catch up.. Good point :) WBR, Sergey Scott Rohling Sent by: Linux on 390 Port 01-10-15 18:05 Please respond to Linux on 390 Port To: LINUX-390@VM.MARIST.EDU cc: Subject:

Re: Documentation for Linux on z Systems and KVM - new

Thank you, Mark DJ On 09/30/2015 11:08 AM, Mark Post wrote: On 9/30/2015 at 11:58 AM, Dave Jones wrote: >> Hello, all. >> >> I now have the zKVM DVD 1.1 here. Where can I find the >> installation/configuration doc for it? > > wget -N

Re: Documentation for Linux on z Systems and KVM - new

Hello, all. I now have the zKVM DVD 1.1 here. Where can I find the installation/configuration doc for it? Thanks and have a good one, too. DJ On 09/24/2015 02:51 AM, Christian Borntraeger wrote: > > z/VM does call SIE on behalf of the guest hypervisor. So for CPU bound > workload, which

Re: Documentation for Linux on z Systems and KVM - new

>>> On 9/30/2015 at 11:58 AM, Dave Jones wrote: > Hello, all. > > I now have the zKVM DVD 1.1 here. Where can I find the > installation/configuration doc for it? wget -N http://public.dhe.ibm.com/software/dw/linux390/docu/l159vq00.pdf wget -N

Re: Documentation for Linux on z Systems and KVM - new

Mark, Very nice, informative, post. Harley Linker Jr. -Original Message- From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Mark Post Sent: Monday, September 28, 2015 3:39 PM To: LINUX-390@VM.MARIST.EDU Subject: Re: Documentation for Linux on z Systems and KVM - new

Re: Documentation for Linux on z Systems and KVM - new

>>> On 9/28/2015 at 02:25 AM, Sergey Korzhevsky wrote: > Alan Altmark wrote: >>> What is it about z that makes virtualization work better? >>50 years of work on it? > > That is interesting answer. One thing came to my mind is the live guest > relocation. As far as i could

Re: Documentation for Linux on z Systems and KVM - new

Alan Altmark wrote: >> What is it about z that makes virtualization work better? >50 years of work on it? That is interesting answer. One thing came to my mind is the live guest relocation. As far as i could find, VMware introduced that feature (vMotion) in 2003, z/VM - in 2011. The same

Re: Documentation for Linux on z Systems and KVM - new

I read these test figures from KVM run within z/VM. In my world you run a hypervisor on the iron, not under another hypervisor, to get performance. Hypervisor under hypervisor is for test only. So test KVN in an LPAR instead, you will miss a lot of z/VM goodies, but you get the performance.

Re: Documentation for Linux on z Systems and KVM - new

You have picked some details that has not been needed in z/VM environments. Since you normally have one or perhaps two systems, where should you move it and why ? Recently we switched some network hardware here and one router failed connections due to some bit's Wrongly set, making network gone

Re: Documentation for Linux on z Systems and KVM - new

Good post - well said, Mark - Scott Rohling On Mon, Sep 28, 2015 at 1:39 PM, Mark Post wrote: > ​ a good post​ > > -- For LINUX-390 subscribe / signoff / archive access instructions, send email to

Re: Documentation for Linux on z Systems and KVM - new

Hi, I am not sure if I understand the offer for KVM from IBM. I know that it is available as a preview in SLES12 But what is: - 5648-KVM KVM for IBM z Systems V1.1 As far as I can tell, it is something that can be ordered from IBM catalog. But what is it? Did IBM came out with their own linux

Re: Documentation for Linux on z Systems and KVM - new

Am 24.09.2015 um 03:34 schrieb Grzegorz Powiedziuk: > That’s very interesting. I wasn’t aware of this “stress” tool. So I’ve > downloaded it and run a couple tests with it. > If I run basic —cpu 1 test (-n according to help is a dry run), the KVM > server spins the CPU 100% in user time. So no

Re: Documentation for Linux on z Systems and KVM - new

Am 24.09.2015 um 01:08 schrieb Mark Post: On 9/23/2015 at 05:57 PM, Grzegorz Powiedziuk wrote: >> As long as KVM can get close to z/vm performance then I >> see a great potential in it. > > I don't think you're going to see that for quite a while. I think we

Re: Documentation for Linux on z Systems and KVM - new

Am 24.09.2015 um 00:42 schrieb Viktor Mihajlovski: > On 23.09.2015 15:32, Grzegorz Powiedziuk wrote: >> BTW, I was playing with KVM few days ago and it looks pretty awesome in >> terms of maintaining the environment and deploying new VMs but the >> performance for me was really bad. >> And I

Re: Documentation for Linux on z Systems and KVM - new

On Thursday, 09/24/2015 at 03:53 EDT, Christian Borntraeger wrote: > z/VM does call SIE on behalf of the guest hypervisor. So for CPU bound > workload, which causes almost no SIE exits things are fine. It is the sweet spot for 2nd level. As > soon as the KVM guest will

Re: Documentation for Linux on z Systems and KVM - new

>>> On 9/24/2015 at 04:56 AM, Christian Borntraeger >>> wrote: > Am 24.09.2015 um 01:08 schrieb Mark Post: -snip- >> Those "8,000 virtual machines > on a z13" quotes I keep seeing from IBM are > all talking >> about z/VM, even though they never come right out and say

Re: Documentation for Linux on z Systems and KVM - new

>>> On 9/24/2015 at 10:36 AM, Rick Troth wrote: > * zKVM obviously means "KVM for IBM z Systems" and is presumed not a > brand IBM blesses in any way. I note a few instances of "zKVM" in the System Administration Guide that IBM published. (SC27-8237-00) Mark Post

Re: Documentation for Linux on z Systems and KVM - new

On 09/24/2015 04:56 AM, Christian Borntraeger wrote: > If you already have KVM on x86 and no z/VM in the house, > KVM on z might be the right tool to integrate the mainframe > in your open environment because it might integrate better > into the operational model that is already deployed. This

Re: Documentation for Linux on z Systems and KVM - new

On Thursday, 09/24/2015 at 10:38 EDT, Rick Troth wrote: > In the broader Linux market, z is alien; z/VM more-so. But now there's > zKVM. But "we" know the value of z/VM. Perhaps zKVM beats xKVM (does > it), but z/VM beats zKVM with one arm tied and one leg hamstrung. How > the

Re: Documentation for Linux on z Systems and KVM - new

BTW, I was playing with KVM few days ago and it looks pretty awesome in terms of maintaining the environment and deploying new VMs but the performance for me was really bad. And I mean extremely bad. I am not sure if it was because I made the KVM host (sles12) run as a virtual machine in z/VM

Re: Documentation for Linux on z Systems and KVM - new

>>> On 9/23/2015 at 03:32 PM, Grzegorz Powiedziuk >>> wrote: > BTW, I was playing with KVM few days ago and it looks pretty awesome in terms > of maintaining the environment and deploying new VMs but the performance for > me was really bad. > And I mean extremely bad. I

Re: Documentation for Linux on z Systems and KVM - new

KVM under z/VM will suck because the hardware only supports two levels of “SIE”. SIE is whats used to allow an LPAR and a virtual machine to operate at hardware speeds. A lot of the stuff that used to be done by VM/SP and predecessors when running virtual machines is done by the hardware (well the

Re: Documentation for Linux on z Systems and KVM - new

Ok, thanks for the explanation. I knew about missing SIE from one of the SHARE presentations but I didn't know that the performance downgrade will be so huge. I will try to get a free LPAR just for KVM at some point but for now I will keep learning and exploring its features in z/vm. So far I

Re: Documentation for Linux on z Systems and KVM - new

>>> On 9/23/2015 at 05:57 PM, Grzegorz Powiedziuk >>> wrote: > As long as KVM can get close to z/vm performance then I > see a great potential in it. I don't think you're going to see that for quite a while. Those "8,000 virtual machines on a z13" quotes I keep seeing

Re: Documentation for Linux on z Systems and KVM - new

On 23.09.2015 15:32, Grzegorz Powiedziuk wrote: BTW, I was playing with KVM few days ago and it looks pretty awesome in terms of maintaining the environment and deploying new VMs but the performance for me was really bad. And I mean extremely bad. I am not sure if it was because I made the KVM

Re: Documentation for Linux on z Systems and KVM - new

That’s very interesting. I wasn’t aware of this “stress” tool. So I’ve downloaded it and run a couple tests with it. If I run basic —cpu 1 test (-n according to help is a dry run), the KVM server spins the CPU 100% in user time. So no stealing at all. Could you run a couple of tests like this

Documentation for Linux on z Systems and KVM - new

Check out the new Linux on z Systems base technology publications on the IBM Knowledge Center and on developerWorks: KVM Virtual Server Quick Start KVM Virtual Server Management Device Drivers, Features, and Commands for Linux as a KVM Guest Installing SUSE Linux Enterprise Server 12 as a KVM