Date: Thu, 28 Jul 2005 19:33:31 +0100 From: Freminlins <freminlins@gmail.com> To: freebsd-questions@freebsd.org Subject: Re: defragmentation in FreeBSD 4.11 Message-ID: <eeef1a4c05072811336b86641a@mail.gmail.com> In-Reply-To: <060c01c59397$2876b460$c901a8c0@workdog> References: <eeef1a4c050728094127f97afb@mail.gmail.com> <060c01c59397$2876b460$c901a8c0@workdog>
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Gayn Winters wrote: =20 > What I get from reading this article is that if the use of the file > system is to store lots of small files, then use a small block size. Am > I missing something? No and yes! There is a minimum block and fragment size. In this case there were not enough contiguous fragments to enable an 8K file to be created. Without checking I believe Solaris uses 8K blocks. > Also, in most situations, buying a big enough disk is far better than > worrying about what happens when a not-big-enough disk starts to get > full. Indeed. But... in the case I linked to there was apparently plenty of free space, just not enough free contiguous space. The author also implies that a bigger disk would not solve the problem: "it creates and deletes tons of small files and thus the fragmentation=20 over a period of time." As mentioned though I have never seen this myself despite running very busy mail and web servers with what must be billions of files being created/deleted in that time. It certainly grabbed my attention so I thought it may be of interest to oth= ers. > -gayn Frem.
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