When MVS crashes, it doesn't get time to write any message into SYSLOG. So I didnt found anything in SYSLOG about MVS crashes.
Thanks & Regards Saurabh On Sun, Aug 7, 2011 at 5:42 PM, Feller, Paul <pfel...@aegonusa.com> wrote: > There are several things you could look for in MVS for a reason it > crashed. Some of the things you could look for are the MVS syslog and/or > LOGREC (EREP) and/or RMF data. There could be one of more SVC dumps that > got taken under MVS just before the crash. As stated in another email a > large number of MVS (z/OS) system don’t run under z/VM so MVS has its own > ways of keeping track of what is happening.**** > > ** ** > > *Paul Feller* > *AIT Mainframe Technical Support* > > **** > > *From:* The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] *On > Behalf Of *saurabh khandelwal > *Sent:* Saturday, August 06, 2011 11:39 PM > > *To:* IBMVM@LISTSERV.UARK.EDU > *Subject:* Re: Performence Toolkit not working.**** > > ** ** > > So, does it mean, by installing z/VM performence tool kit will not tell us > any detail about the guest running under z/VM ( MVS guest) . > > Basically my aim is to find out the reason behind crashing MVS guest > suddenly , which are running under zVM. > > So can you please suggest, what will be the best solution to find root > cause of MVS guest crashing. > > > Thanks & Regards > Saurabh > > > **** > > On Sun, Aug 7, 2011 at 2:50 AM, Les Koehler <vmr...@tampabay.rr.com> > wrote:**** > > Kris, > > Isn't MVS under VM different than just straight MVS on its own? Or have > things changed since the old days? > > Les**** > > > > Kris Buelens wrote:**** > > MVS doesn't normally have anything to forward performance info to Perfkit. > MVS has its own performance collection and reporting tools. > > 2011/8/6 saurabh khandelwal <sourabhkhandelwal...@gmail.com>**** > > Thanks for reply. > > > Yes, I am trying to reach out the person, who has configured Performance > toolkit in my site. So that I can get exact detail, how he configured this. > > As I am new with performance toolkit, I also wanted to ask is it possible > to get MVS guest information from performance toolkit , which are running > under z/VM. > > Thanks & Regards > Saurabh > > > On Sat, Aug 6, 2011 at 1:44 PM, Jeff Gribbin <jeff.grib...@gmail.com > >wrote:**** > > Saurabh, > You have almost-certainly indentified the cause of your problem - it is > NEVER, EVER safe to share the same CMS minidisk accessed in write-mode by > more than one CMS user at the same time - it almost-guarantees that the > disk > file system will be damaged. > > DASD sharing always requires the sharing systems to be aware that the DASD > is shared and take measures to ensure that the data is not corrupted - > these > can be via hardware functions such as RESERVE / RELEASE or via software > processes that use a communications link to agree amongst themselves which > system has write-permission at any one instant. > > CMS contains no sharing mechanism at all for its minidisks (think of a CMS > user as a virtual Personal Computer - write-sharing a minidisk is like > connecting two personal computers that have no knowledge of each others' > existence to the same hard drive!) > > If you wish to share data in write-mode among CMS users then you need to > look at the CMS Shared File System which uses a server to co-ordinate the > I/O among many CMS clients. (In this client/server setup, it's only the > DATA > that is shared - the actual DASD is only read/written by the server which > (of course) has complete knowledge of which clients are accessing which > data.) > > Sharing minidisk-containing volumes between separate z/VM systems requires > a lot of care if it is to be successful. If you can tell us a little more > about your configuration and how you run it I'm sure that we can offer you > some suggestions about how to achieve what you wish to do but ... in the > meantime ... yes, each PERFSVM requires a separate 191 (and 195) minidisk. > > Regards > Jeff Gribbin**** > > > > -- > Thanks & Regards > Saurabh Khandelwal**** > > > > **** > > > > > -- > Thanks & Regards > Saurabh Khandelwal**** > -- Thanks & Regards Saurabh Khandelwal
