Date: Tue, 22 May 2001 20:01:56 -0700 From: Terry Lambert <tlambert2@mindspring.com> To: Nadav Eiron <nadav@cs.Technion.AC.IL> Cc: hackers@FreeBSD.ORG, Jason Andresen <jandrese@mitre.org> Subject: Re: technical comparison Message-ID: <3B0B2824.949B119A@mindspring.com> References: <Pine.GSO.3.95-heb-2.07.1010522222340.14554A-100000@csd>
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Nadav Eiron wrote: > > I ran tests that I think are similar to what Jason ran on identically > configured FreeBSD and Linux/ReiserFS machines. ResierFS is much much > faster than UFS+softupdates on these tests. [ ... ] > Both tests were done with postmark-1.5, 60000 files in > 10000 transactions. The machines are IBM Netfinity 4000R, > the disk is an IBM DPSS-336950N, connected to an Adaptec > 2940UW. I don't understand the inability to perform the trivial design engineering necessary to keep from needing to put 60,000 files in one directory. However, we can take it as a given that people who need to do this are incapable of doing computer science. I would suggest two things: 1) If write caching is off on the Linux disks, turn it off on the FreeBSD disks. 2) " " -- and then turn it on on both. 3) Modify the test to delete the files based on a directory traversal, instead of promiscuous knowledge of the file names, which is cheating to make the lookups appear faster. (the rationale behind this last is that people who can't design around needing 60,000 files in a single directory are probably going to to be unable to correctly remember the names of the files they created, since if they could, then they could remember things like ./a/a/aardvark or ./a/b/abominable). -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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