On Tue, 16 Oct 2007 21:45:48 +0200, R.S. <[EMAIL PROTECTED]> wrote: >Mark Zelden wrote: >> On Tue, 16 Oct 2007 16:49:29 +0200, R.S. <[EMAIL PROTECTED]> wrote: >>> Can you use tapes when i.e. moving HSC CDS files ? >> >> Why would I need to move them? > >It was only example. Another example would be CDS backup. During the >backup one cannot use HSC functions. So, currently running tape >activities are still running, but no new allocation would occur. Am I >right with that ? >
The allocation occurs, just not the virtual tape mount. :-) But that is correct. Our backup job runs in a "hot batch" service class and even with hundreds of thousands of virtual tapes defined it only runs for a couple of minutes. So that is not a problem at all. > >>> You can have multiple boxes, but usually you have only one NCS >>> environment (HSC, VTCS, LS). More precisely: possibly multiple HSC >>> instances sharing single set of CDSes. >>> >> >> I see where you are going... but what does that have to do >> with the price of tea in China (American saying)? If we need to >> reconfigure our DASD, we have an outage also. With the newer >> versions of Sun/STK software you can add / change just about >> anything on the fly (although we do have scheduled outage windows >> so we don't have to use those features). > >Such outage can be caused by variety of reasons. There still are cases >when total HSC shutdown is required, I also could imagine simple plain >errors like software failure, or CDS corruption. This is quite unlikely, >this is rare, but it can happen. > If that were to happen, SMF is the least of my problems. DB2 archives go to virtual tape and as soon as all of the alternate logs fill up, DB2 stops. We can create "what if" scenarios all day that will cause problems. By why limit those to virtual tape? We've had DASD controller failures, CF, OS software, ISV software, even entire CEC go belly up. So your not convincing me of anything. Mark -- Mark Zelden Sr. Software and Systems Architect - z/OS Team Lead Zurich North America / Farmers Insurance Group - ZFUS G-ITO mailto:[EMAIL PROTECTED] z/OS and OS390 expert at http://searchDataCenter.com/ateExperts/ Systems Programming expert at http://expertanswercenter.techtarget.com/ Mark's MVS Utilities: http://home.flash.net/~mzelden/mvsutil.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
