Date: Wed, 14 Sep 2005 13:20:45 -0700 From: Glenn Dawson <glenn@antimatter.net> To: dmarshall@gmail.com, freebsd-questions@freebsd.org Subject: Re: File-Backed Memory Disks: Performance and Manipulation Message-ID: <6.2.3.4.2.20050914131834.09a3bb80@cobalt.antimatter.net> In-Reply-To: <53f1586305091412443a993251@mail.gmail.com> References: <53f1586305091412443a993251@mail.gmail.com>
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At 12:44 PM 9/14/2005, David Marshall wrote: >Hi, > >Scenario: We have millions of little (almost all < 10 kB), about 30 GB >total. It takes > 24 hours to either tar them up or then untar them. >It finally occured to us to put them into a file-backed memory disk. > >Questions: > >1. How does the performance of a file-backed memory disk change as it >becomes large? > >2. Is there a clever way to make such a file-backed memory disk bigger >after the fact? If I want to expand my 30 GB file to 50 GB, am I >stuck with just making a new one and copying it over? I've done that by concatenating an empty file of the size I wish to add on to the end of the existing backing store file, editing the disk label and then using growfs to expand into the new space. -Glenn >TIA! >_______________________________________________ >freebsd-questions@freebsd.org mailing list >http://lists.freebsd.org/mailman/listinfo/freebsd-questions >To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org"
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