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Fail-over

What does "fail-over" mean in computer systems?
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ayottey
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ayottey
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sanalCommented:
fail over means, if one fails, the other will take over.

For example you have two computers doing some task.  You can configure them in such a way that the first one does the usual work.  If the first one fails the second one will take over the work.
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ayotteyAuthor Commented:
Your definition seems accurate, based on what I had thought to be true.  However, an expert at another site provided an important additional aspect of fail-over: avoidance of any service interruption.

Here is his or her definition:
fail-over basically describes the take over of a system when another system fails without any interruption of service.
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