Yes, the software that uses such a file must protect against collisions. That is apparently the job of the ISPF service machine in this environment. Your environment is quite the opposite. The writing of new files will indeed not work with MW disks.
Why can you not use SFS? Regards, Richard Schuh -----Original Message----- From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Ian S. Worthington Sent: Tuesday, May 01, 2007 10:01 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: Link Multiple Write safely That's interesting, but conflicts with what some other folks have said here earlier. We are under CMS, and I don't want to do simultaneous update to a single file, just allow several service machine to write their output files to single location, which requires a mw-tolerant directory. Apparently we can't convert the minidisks we're using to SFS. NFS, as mentioned earlier might be an option: I'm trying to find out if its enabled. ian ------ Original Message ------ Received: Tue, 01 May 2007 05:29:09 PM BST From: "Schuh, Richard" <[EMAIL PROTECTED]> To: IBMVM@LISTSERV.UARK.EDU Subject: Re: Link Multiple Write safely > There is a very big one at this shop that is mode 6, and has been shared > for the 9+ years that I have been here and, I think, about 6 years > before that. With mode 6, you can update in place so long as you do not > change the record length of an existing record. We have a source control > system that uses ISPF panels that requires that all users get the disk > having this pseudo maclib MW. > > In any event, the updating of a record in place requires no changes that > will corrupt the disk if it is MW by several users, in our case, over > 50, at the same time. So if that is how you intend to use the disk, MW > is perfectly safe under CMS. > > Regards, > Richard Schuh > > > -----Original Message----- > From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On > Behalf Of Ed Zell > Sent: Tuesday, May 01, 2007 9:06 AM > To: IBMVM@LISTSERV.UARK.EDU > Subject: Re: Link Multiple Write safely > > > Mode 6 files can be shared so long as the software takes > > care not to have record collisions. ISPF handles sharing > > its fake MACLIBs that way under CMS. > > > I don't think this is the case. None of our ISPF MACLIB's > are file mode 6. > > I was under the impression that ISPF handles sharing by forcing > all updates to go through the ISPVM virtual machine. But I > could be wrong (as has happened many times in the past!). > > > Ed Zell > Illinois Mutual Life > (309) 674-8255 x-107 > . > > > CONFIDENTIAL NOTICE: This communication, including any attachments, is > intended only for the use of the individual or entity to which it is > addressed and contains information which may be confidential. If you > are not the intended recipient, any distribution or copying of this > communication is strictly prohibited. If you have received this > communication in error, notify the sender immediately, delete the > communication and destroy all copies. Thank you for your compliance. >
