Then you are condemned to repeat it...
-----Original Message-----
From: Robert Broderick [mailto:[EMAIL PROTECTED]
Sent: Friday, June 13, 2003 9:22 AM
To: [EMAIL PROTECTED]
Subject: Re: MQ software evolution - fill in the gaps?
OH Well, I guess I am getting a F in History this semester!!!!!
bee-oh-dubble-bee-dubble-egh
>From: Paul Clarke <[EMAIL PROTECTED]>
>Reply-To: MQSeries List <[EMAIL PROTECTED]>
>To: [EMAIL PROTECTED]
>Subject: Re: MQ software evolution - fill in the gaps?
>Date: Fri, 13 Jun 2003 13:36:21 +0100
>
>After my last append I have had a number of private queries asking things
>like "wasn't MQ based on TCAM" etc. So I went to the horses mouth as it
>were and spoke to one of the senior developers on the WMQ z/OS product
>who's been working on MQ even longer than I have. This was his
>response.....
>
>"I'm sorry to spoil anyone's ideas of the history of the 390 Queue Manager
>but I think it is worth clarifying the real origins of the product. Some
>of the initial infrastructure code and functional resource managers were
>taken from DB2 . The initial development team reused a number of the DB2
>resource managers for which a database and queue manager have similar
>requirements. For example , a Recovery Manager, a Log Manager , a
>Storage manger , Command Handling/ Parsing , Utilities etc. This is why at
>a first glance the casual observer might confuse a DB2mstr address space
>with a WMQmstr address space. We also used the Data Space Control
>Facility (DSCF) services of DB2 , to provide a framework in which it was
>easy/easier to add queueing specific resource managers to a Queue Manager
>product. But he most important point to note is that all of the Queueing
>specific resource managers were written at Hursley, for example the
>Message Manager , the Data Manager , the Buffer Manager , the Lock Manager
>and the Security Manager to name but a few. Many of these components had
>to be written from scratch due to the fundamental differences in read/write
>profiles of users of databases and the users of queues.
>Paul Kettley MQ/MQSeries/WMQ developer 1991-2003""
>
>So.....let's hear no more about TCAM or EzBridge eh ?
>
>Cheers,
>P.
>
>Paul G Clarke
>WebSphere MQ Development
>IBM Hursley
>
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