Date: Fri, 17 Sep 1999 09:00:26 -0700 (PDT) From: David Wolfskill <dhw@whistle.com> To: blk@skynet.be, dnelson@emsphone.com Cc: freebsd-current@FreeBSD.ORG, tomdean@ix.netcom.com Subject: Re: More benchmarking stuff... Message-ID: <199909171600.JAA08613@pau-amma.whistle.com> In-Reply-To: <19990917104608.A55059@dan.emsphone.com>
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>Date: Fri, 17 Sep 1999 10:46:08 -0500 >From: Dan Nelson <dnelson@emsphone.com> >Don't NetApps do logging, so if the system crashes, the files are >recovered from the log? It's my (ca. 4-year-ancient) recollection that the write requests are written to a split NVRAM buffer; when one half hits the high-water mark (or a timer pops, whichever happens first), the "active half" of the buffer is switched, and the half that had been written to has its entries committed to disk. So basically, yes -- the NetApp shouldn't lose data. (But "files" aren't written to the NVRAM; it's fairly raw write requests that get written.) Cheers, david -- David Wolfskill dhw@whistle.com UNIX System Administrator voice: (650) 577-7158 pager: (888) 347-0197 FAX: (650) 372-5915 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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