21CS Insights
Driving the Future of Mainframe Innovation
Exploring the trends, challenges, and solutions shaping enterprise IT.
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Featured Article
Why Historical Data Is the Backbone of Performance and Capacity Forecasting
It's the middle of the night, and a batch window that normally finishes by four is still running. Whoever's on call has to answer a question: is this a real problem, or just noise?What's on the...Read MoreReal Time Performance & Cost Control
September 16, 2026
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21CS Releases SENTINELn
21CS Launches SENTINELn: See Every Change. Control Every Outcome.z/OS Change Management
January 23, 2026
Discover Your STRATUSn Savings
Learn how STRATUSn saves on storage, simplifies your systems, and prepares your mainframe for the next generation.