Date: Sat, 30 Aug 2003 14:49:34 +0200 (CEST) From: =?iso-8859-1?q?Claus=20Guttesen?= <cguttesen@yahoo.dk> To: das@FreeBSD.ORG, freebsd-performance@freebsd.org, seanc@FreeBSD.org Subject: Re: Some additional tests run on my performance testing Message-ID: <20030830124934.83896.qmail@web14103.mail.yahoo.com>
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Hi. > Note that doing sequential reads and writes is VERY > different from doing random reads and writes. In the > former case, a larger filesystem block size may reduce > fragmentation and help you, but in the latter > case---specifically for writes---you're doing twice > the I/O due to the larger filesystem blocks. Your > import and Bill's tests fall into the first category. > It would be interesting to see what sort of performance > you get under a real workload. Valid point you make there. My db is up and running now with 16 kb blocks, but I'd like to try it out with 8 kb blocks. Can I simply do a file-copy of the database, newfs the partition with 8 kb blocks, and copy the database back to take advantage of the 8 kb blocksize? Or do I have to dump, newfs, create and import the database? regards Claus Yahoo! Mail (http://dk.mail.yahoo.com) - Gratis: 6 MB lagerplads, spamfilter og virusscan
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