Re: Bug report: mdadm -E oddity

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Peter T. Breuer wrote:

berk walker <berk@xxxxxxxxx> wrote:


for us old folks, please expand "idempotent" in usage to reflect the relationships to which you refer.



Function f is idempotent when f.f = f. I.e. Doing it twice is the same as doing it once.

Here the question is if you do a fraction f of a write w, and then do the
whole write w again, whether you get what you are expecting. I.e. if

    w.f = w

and f is the restriction of w to some set s, f = w|s.

Peter

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OK, I understand that def.  thanks, PTB.
b-
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