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
