Re: Dump a linux guest from z/VM
On Saturday, 02/27/2016 at 08:59 GMT, Kirk Bradleywrote: > Right.. a CMS dump helper is what I had in mind.. maybe you SMSG it to take a > dump of another guest.. something like that. > > My real problem is that VMDUMP is so horrible that IBM needs to fix it - make > another command / subsystem / "I don?t care what? that can fully utilize the > I/O power of a mainframe .. and it works against all guests just like VMDUMP. > Why does each OS need to have it?s own way of doing that. Otherwise why would > VMDUMP have been written in the first place? Yes, you might be able to write a CMS dump helper. The question is why would you? The Linux folks have to have a dump program that works with or without VM. Same for the other OSes. And the SA dump programs are built with knowledge of how the OS organizes memory. As it happens, VM and Linux now use the same dump program. VMDUMP was written in a kinder, gentler era. Virtual machines were small. VMDUMP got its job done in an acceptable amount of time, and it's still fine for CMS and GCS dumps. Otherwise, use the OS-specific SA dump program. Since there's already an acceptable method of getting SA dumps from Linux in a reasonable amount of time, there's no business reason to spend resources upgrading VMDUMP. There are other, higher priority items in queue. So build and practice using the new z/VM 6.3 SA dump program before you need it. Do it with Linux, too. If you're fiddling around trying to understand it when the OS is dead, you're going to simply reboot in the interest of time and miss the opportunity to get the dump. All in the hope that it won't happen again. Alan Altmark Senior Managing z/VM and Linux Consultant Lab Services System z Delivery Practice IBM Systems & Technology Group ibm.com/systems/services/labservices office: 607.429.3323 mobile; 607.321.7556 alan_altm...@us.ibm.com IBM Endicott -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: Dump a linux guest from z/VM
Right.. a CMS dump helper is what I had in mind.. maybe you SMSG it to take a dump of another guest.. something like that. My real problem is that VMDUMP is so horrible that IBM needs to fix it - make another command / subsystem / "I don’t care what” that can fully utilize the I/O power of a mainframe .. and it works against all guests just like VMDUMP. Why does each OS need to have it’s own way of doing that. Otherwise why would VMDUMP have been written in the first place? > On Feb 26, 2016, at 6:26 PM, Alan Altmarkwrote: > > On Friday, 02/26/2016 at 11:16 GMT, Kirk Bradley wrote: >> Don?t you wish guest A could map guest B?s real memory as a secondary > address >> space on command and then you can use A to dump as far and fast as you > want w/o >> perturbing anything at all in B - it?s already stopped etc. > > A guest that runs DAT OFF (CMS and GCS) can do that. It's one of the > things that ESA/XC architecture mode enables. Linux can't do it because > it runs DAT ON. Look at the PERMIT function of the ADRSPACE macro. > > There are all sorts of ideas floating around on how make dumps go faster. > Even z/OS asks these questions. The Linux kdump & friends is the way to > go. > > For those z/VM 6.3 clients who haven't built their SA dump kernel, please > do so. If you wait until you need it, it will be too late. > > Alan Altmark > > Senior Managing z/VM and Linux Consultant > Lab Services System z Delivery Practice > IBM Systems & Technology Group > ibm.com/systems/services/labservices > office: 607.429.3323 > mobile; 607.321.7556 > alan_altm...@us.ibm.com > IBM Endicott > > -- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > -- > For more information on Linux on System z, visit > http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: Dump a linux guest from z/VM
On Friday, 02/26/2016 at 11:16 GMT, Kirk Bradleywrote: > Don?t you wish guest A could map guest B?s real memory as a secondary address > space on command and then you can use A to dump as far and fast as you want w/o > perturbing anything at all in B - it?s already stopped etc. A guest that runs DAT OFF (CMS and GCS) can do that. It's one of the things that ESA/XC architecture mode enables. Linux can't do it because it runs DAT ON. Look at the PERMIT function of the ADRSPACE macro. There are all sorts of ideas floating around on how make dumps go faster. Even z/OS asks these questions. The Linux kdump & friends is the way to go. For those z/VM 6.3 clients who haven't built their SA dump kernel, please do so. If you wait until you need it, it will be too late. Alan Altmark Senior Managing z/VM and Linux Consultant Lab Services System z Delivery Practice IBM Systems & Technology Group ibm.com/systems/services/labservices office: 607.429.3323 mobile; 607.321.7556 alan_altm...@us.ibm.com IBM Endicott -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: Dump a linux guest from z/VM
VMDUMP has been slow (no, super slo) since the first day it existed. I can’t for the life of me figure out why that needs to be so but it is. Don’t you wish guest A could map guest B’s real memory as a secondary address space on command and then you can use A to dump as far and fast as you want w/o perturbing anything at all in B - it’s already stopped etc. > On Feb 26, 2016, at 2:51 PM, Robert J Brennemanwrote: > > first make sure you have enough empty spool space to contain the entire > guest's memory. IE for a 1 GB guest have 1 GB of spool available. > > then from the broken guest's console : #CP VMDUMP > > While you wait for that to run, read: > http://public.dhe.ibm.com/software/dw/linux390/docu/l26edt00.pdf > Pay attention to the parts about kdump, since you want to get that working > for next time. It is way faster than the VMDUMP command. > > Once the dump is complete, reboot the Linux system, and then use the linux > vmur command to pull the dump from the 0.0.000c reader device , use the > --convert option, and send the resulting file to SUSE. It is probably good > form to compress it with gzip first. > > On Fri, Feb 26, 2016 at 4:56 PM, Victor Echavarry Diaz < > vechava...@evertecinc.com> wrote: > >> We can't login a Linux guest ,but is working. We open an issue with >> novell, they asked for a DUMP. But because we can't login, we can take the >> dump. Our question is, can we made a dump from z/vm so Novell can use it? >> We have SLES 11SP4 under z/VM 6.3 SSI. >> >> Regards, >> >> Victor Echavarry >> System Programmer, EVERTEC LLC >> >> >> >> >> WARNING: This email and any files transmitted with it are confidential and >> intended solely for the use of the individual or entity to whom they are >> addressed. If you have received this email in error please delete it >> immediately. >> Please note that any views or opinions presented in this email are solely >> those >> of the author and do not necessarily represent those of EVERTEC, Inc. or >> its >> affiliates. Finally, the integrity and security of this message cannot be >> guaranteed on the Internet, and as such EVERTEC, Inc. and its affiliates >> accept >> no liability for any damage caused by any virus transmitted by this email. >> >> -- >> For LINUX-390 subscribe / signoff / archive access instructions, >> send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or >> visit >> http://www.marist.edu/htbin/wlvindex?LINUX-390 >> -- >> For more information on Linux on System z, visit >> http://wiki.linuxvm.org/ >> > > > > -- > Jay Brenneman > > -- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > -- > For more information on Linux on System z, visit > http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: Dump a linux guest from z/VM
first make sure you have enough empty spool space to contain the entire guest's memory. IE for a 1 GB guest have 1 GB of spool available. then from the broken guest's console : #CP VMDUMP While you wait for that to run, read: http://public.dhe.ibm.com/software/dw/linux390/docu/l26edt00.pdf Pay attention to the parts about kdump, since you want to get that working for next time. It is way faster than the VMDUMP command. Once the dump is complete, reboot the Linux system, and then use the linux vmur command to pull the dump from the 0.0.000c reader device , use the --convert option, and send the resulting file to SUSE. It is probably good form to compress it with gzip first. On Fri, Feb 26, 2016 at 4:56 PM, Victor Echavarry Diaz < vechava...@evertecinc.com> wrote: > We can't login a Linux guest ,but is working. We open an issue with > novell, they asked for a DUMP. But because we can't login, we can take the > dump. Our question is, can we made a dump from z/vm so Novell can use it? > We have SLES 11SP4 under z/VM 6.3 SSI. > > Regards, > > Victor Echavarry > System Programmer, EVERTEC LLC > > > > > WARNING: This email and any files transmitted with it are confidential and > intended solely for the use of the individual or entity to whom they are > addressed. If you have received this email in error please delete it > immediately. > Please note that any views or opinions presented in this email are solely > those > of the author and do not necessarily represent those of EVERTEC, Inc. or > its > affiliates. Finally, the integrity and security of this message cannot be > guaranteed on the Internet, and as such EVERTEC, Inc. and its affiliates > accept > no liability for any damage caused by any virus transmitted by this email. > > -- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or > visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > -- > For more information on Linux on System z, visit > http://wiki.linuxvm.org/ > -- Jay Brenneman -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: Dump a linux guest from z/VM
We use stand-alone dump. Need's to be set up but you can do that from another guest. It will stop your server when you IPL it though. See the correct edition of Using the Dump Tools on SUSE Linux Enterprise Server 11 SP3 http://public.dhe.ibm.com/software/dw/linux390/docu/les3dt02.pdf I don't see one for SP4. You might want to talk to SUSE first, though. Sent from my iPhone > On Feb 26, 2016, at 1:56 PM, Victor Echavarry Diaz >wrote: > > We can't login a Linux guest ,but is working. We open an issue with novell, > they asked for a DUMP. But because we can't login, we can take the dump. Our > question is, can we made a dump from z/vm so Novell can use it? We have SLES > 11SP4 under z/VM 6.3 SSI. > > Regards, > > Victor Echavarry > System Programmer, EVERTEC LLC > > > > > WARNING: This email and any files transmitted with it are confidential and > intended solely for the use of the individual or entity to whom they are > addressed. If you have received this email in error please delete it > immediately. > Please note that any views or opinions presented in this email are solely > those > of the author and do not necessarily represent those of EVERTEC, Inc. or its > affiliates. Finally, the integrity and security of this message cannot be > guaranteed on the Internet, and as such EVERTEC, Inc. and its affiliates > accept > no liability for any damage caused by any virus transmitted by this email. > > -- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > -- > For more information on Linux on System z, visit > http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Dump a linux guest from z/VM
We can't login a Linux guest ,but is working. We open an issue with novell, they asked for a DUMP. But because we can't login, we can take the dump. Our question is, can we made a dump from z/vm so Novell can use it? We have SLES 11SP4 under z/VM 6.3 SSI. Regards, Victor Echavarry System Programmer, EVERTEC LLC WARNING: This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please delete it immediately. Please note that any views or opinions presented in this email are solely those of the author and do not necessarily represent those of EVERTEC, Inc. or its affiliates. Finally, the integrity and security of this message cannot be guaranteed on the Internet, and as such EVERTEC, Inc. and its affiliates accept no liability for any damage caused by any virus transmitted by this email. -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/