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Testing Mainframe Environments Using Open-Source Tools
BlazeMeter has a plugin that enables performance testing the mainframe with Apache JMeter™. Previously, mainframe system testing could only be conducted through legacy tools and was dependent on dedicated engineers in Performance Centers. Now, everyone can use JMeter’s easy to use GUI to run a load or functional performance test on mainframe servers.

The RTE plugin, which can be found through JMeter plugins, supports IBM mainframe protocols and server protocols TN5250 and TN3270. The JMeter RTE plugin simulates a mainframe terminal sending actions and keystrokes to the mainframe server. The terminal types that can be simulated are:
TN5250:
IBM - 3179 -2: 24x80
IBM - 3477 -FC: 27x132
TN 3270:
IBM - 3278 -M2: 24x80
IBM - 3278 -M2-E: 24x80
IBM - 3278 -M3: 32x80
IBM - 3278 -M3-E: 32x80
IBM - 3278 -M4: 43x80
IBM - 3278 -M4-E: 43x80
IBM - 3278 -M5: 27x132
IBM - 3278 -M5-E: 27x132
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