If it isn’t broken…

(Legacy systems – their role – their future.)

I used to run a company which specialized in providing so-called Direct Market Access (DMA) to suitably authorized Buy-Side firms – as well as to many firms on the Sell-Side.  Many of these firms (particularly the High Frequency Trading variety) would each generate transactions at a rate of some 30,000 messages per second.

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Getting the basics right

Mainframes are expensive – no-one disagrees with that. But what they can do is run industrial strength workloads for less than it would cost on other platforms with much less likelihood of any kind of system malfunction. Having said that, it makes sense to understand mainframe performance and ways that those costs could be reduced.

Let’s start by looking at performance and performance management. Here are some of the metrics used by performance-monitoring tools (also see Does Your Mainframe Need an Oil Change):

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