From mboxrd@z Thu Jan 1 00:00:00 1970 From: berk walker Subject: Re: Bug report: mdadm -E oddity Date: Fri, 20 May 2005 18:14:44 -0400 Message-ID: <428E6154.9040803@panix.com> References: <1115999051.3974.14.camel@compaq-rhel4.xsintricity.com> <1116004267.3974.35.camel@compaq-rhel4.xsintricity.com> <17029.12773.197506.463977@cse.unsw.edu.au> <1116077316.13780.52.camel@compaq-rhel4.xsintricity.com> <17037.35615.456231.737766@cse.unsw.edu.au> <1116592212.23785.75.camel@compaq-rhel4.xsintricity.com> <428E0A92.3060108@steeleye.com> <1116611115.23785.89.camel@compaq-rhel4.xsintricity.com> <428E421B.3050902@panix.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: "Peter T. Breuer" Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids Peter T. Breuer wrote: >berk walker 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 > >- >To unsubscribe from this list: send the line "unsubscribe linux-raid" in >the body of a message to majordomo@vger.kernel.org >More majordomo info at http://vger.kernel.org/majordomo-info.html > >. > > > OK, I understand that def. thanks, PTB. b-