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

Paul Vernon wrote:

>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. "
>
Hay, I think thir referres to IMS/TM, the transaction monitor, and not IMS/DB (aka DL/I). I
would presume that most of the time they are running mainly DB2 applications under IMS
(and perhaps the stray DL/I database in the mix)

Lauri

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Received on Wed Oct 22 2003 - 15:49:30 CEST