> > > The day that it becomes commonplace for, say, three unix servers > > to be able to support the entire IT production environment > > for a large company, and do so reliably, I'll concede the point. >
Hmm, how about most of the largest Telcos in Asia, the largest airlines in Asia, and a 270TB Credit Card Authorisation company, to name a few. What do the core applications in NASDAQ run on? Most of the Unix sites I work in running large, partitioned Servers from IBM, SUN and HP seem to be much, much larger than many of the sites discussed on this list - and I'm talking transaction volume and customers, not just TB. And of course the very high availability applications aren't on MVS at all - they are running on Stratus and Tandem (HP), right? Then there is technology like Engenera and VMware, or simple bladeservers at the low end that make many single application, clustered servers a low cost reality. One customer has 240 servers running on Bladeservers in a pair of 19" cabinets connected to storage using iSCSI. MVS with all its WLM automated knob twirling would not be able to give the same combined level of RAS or TCO for these 240 applications. And these are servers, so even if there is just an average of 5 concurrent users per application we are talking 1200 users. Ron ---------------------------------------------------------------------- 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
