Christoph WoskowskiLead Software Architect

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Is it safe to „let it crash”?

from on 14.09.2013
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Picture: pull the plug

If something gets out of control, why not just “let it crash”? If you think about critical parts of the infrastructure or critical systems like planes, trains or nuclear reactors – well, obviously you can’t.

Nobody wants their system to crash, but is that necessarily true of all its components? Often it would be even desirable for a misbehaving control unit or software component to stop working at all – and instantly being replaced by a redundant (or better diverse) part – than to compromise the whole system for a longer period of time. Of course it is then necessary to recognize the crash as early as possible and replace the failed component via hot-spare as fast as possible. Detecting and compensating a still actively misbehaving part of hardware or software corrupting the whole system is much more difficult. Continue reading