Mark: One useful alternative to the standalone dump utility is the VMDUMP command. It produces a core image dump as a spool file that can be loaded onto disk using the CMS DUMPLOAD command and examined using the Dump Viewing Facility and (soon) the VM Dump Tool. While there's no Linux-specific support in the dump readers, developing some would not be a huge effort (they both provide macro facilities and control block mapping functions).
Two of the best advantages of VMDUMP are (1) it's always available, and (2) one command (VMDUMP 0-END) gets the information you need in almost all situations. Romney On Sat, 13 Jul 2002 11:47:09 -0400 Post, Mark K said: >Rob, > >I can't help too much with the VM-specific stuff, but I would recommend that >you investigate the Linux/390 2.4 standalone dump utility. If this ever >happens again, and they're going to force the machine off and re-boot it, >they should use the SAD to get some diagnostic information before doing >that. In the past, we've had to do things such as tell operations "if you >don't have any diagnostic data for us, we're not accepting any problems >records," to get the message across. > >Mark Post > >-----Original Message----- >From: Rob Schwartz [mailto:[EMAIL PROTECTED]] >Sent: Friday, July 12, 2002 4:58 PM >To: [EMAIL PROTECTED] >Subject: System "Hang" > > >We are running SUSE 7.2 in an IFL with z/VM 4.1. On this machine we are >running UDBEE 7.2. Early this morning the machine hung up. I have very >little information to go on. Here is what I have. > >/var/log/messages >After 01:13 there were no new messages. The last message showed an REXEC >session starting. This REXEC is started from an OS/390 machine and has >worked fine for weeks. > >Telnet connections would time-out. > >I do NOT know if the VM user was consuming CPU or doing I/O. > >The machine was recycled and now the REXEC-started procedure works. > >I instructed the people involved with this on how to do an INDICATE USER >command to gather some VM-perspective information. Are there any logs >other than /var/log/messages that could be helpful? Is there something >that I could turn on to further trace activity on the system? > >Regards, >Rob
