Re: foundations of relational theory? - some references for the truly starving

"Paul Vernon" <paul.vernon_at_ukk.ibmm.comm> writes:
> http://www-3.ibm.com/software/data/ims/
> http://www-3.ibm.com/software/data/ims/presentations/two/imsoverview/index.htm
>
> a.. "More than ninety-five percent of the Fortune 1000 companies use
> IMS. IMS serves 200 million end users, managing over 15 billion
> Gigabytes of production data and processing over 50 billion
> transactions every day. IMS still owns the high-volume on-line
> transaction and database management environment. IMS customers have
> been driving their own growth with IMS - over 79 million
> transactions were handled by one customer in a single day on a
> single sysplex system, 30 Million Trans/Day on a single CEC. 7
> million Transactions/ hour and 120 million transactions/day were
> handled by another customer. IMS in-house testing has reached over
> 4000 transactions/sec across TCP/IP to a single IMS on a single
> machine (G6). And we have reached 11,246 trans/sec (nearly 1 Billion
> trans/day) with IMS Data/Queued Sharing on a 2-CPC Sysplex.. One
> large customer has also indicated they have reached over 3000 days
> without an outage and another over 2000 days and still going
> strong. "

several years ago .... in a meeting with one of the large financial backbone systems ... they attributed their one hundred percent availability for the previous six years (aka no outages, either scheduled or unscheduled):

• ims hotstandby
• automated operator

and since then, I believe they have continued to have one hundred percent availability.

random past ims hot-standby posts:

ttp://www.garlic.com/~lynn/98.html#35a Drive letters
http://www.garlic.com/~lynn/98.html#37 What is MVS/ESA?
http://www.garlic.com/~lynn/98.html#40 Comparison Cluster vs SMP?
http://www.garlic.com/~lynn/99.html#71 High Availabilty on S/390
http://www.garlic.com/~lynn/99.html#77 Are mainframes relevant ??
http://www.garlic.com/~lynn/99.html#92 MVS vs HASP vs JES (was 2821)
http://www.garlic.com/~lynn/99.html#128 Examples of non-relational databases
http://www.garlic.com/~lynn/2000f.html#12 Amdahl Exits Mainframe Market
http://www.garlic.com/~lynn/2000f.html#54 360 Architecture, Multics, ... was (Re: X86 ultimate CISC? No.)
http://www.garlic.com/~lynn/2001e.html#44 Where are IBM z390 SPECint2000 results?
http://www.garlic.com/~lynn/2001k.html#13 HP-UX will not be ported to Alpha (no surprise)exit
http://www.garlic.com/~lynn/2001k.html#14 HP-UX will not be ported to Alpha (no surprise)exit
http://www.garlic.com/~lynn/2001k.html#18 HP-UX will not be ported to Alpha (no surprise)exit
http://www.garlic.com/~lynn/2001l.html#47 five-nines
http://www.garlic.com/~lynn/2001n.html#3 News IBM loses supercomputer crown
http://www.garlic.com/~lynn/2001n.html#47 Sysplex Info
http://www.garlic.com/~lynn/2001n.html#85 The demise of compaq
http://www.garlic.com/~lynn/2002e.html#68 Blade architectures
http://www.garlic.com/~lynn/2002h.html#73 Where did text file line ending characters begin?
http://www.garlic.com/~lynn/2002o.html#14 Home mainframes
http://www.garlic.com/~lynn/2002o.html#68 META: Newsgroup cliques?
http://www.garlic.com/~lynn/2002q.html#35 HASP:
http://www.garlic.com/~lynn/2003.html#37 Calculating expected reliability for designed system
http://www.garlic.com/~lynn/2003h.html#56 The figures of merit that make mainframes worth the price
http://www.garlic.com/~lynn/2003l.html#11 how long does (or did) it take to boot a timesharing system?

-- 
Anne & Lynn Wheeler | http://www.garlic.com/~lynn/ 
Internet trivia 20th anv http://www.garlic.com/~lynn/rfcietff.htm