Re: Some additional tests run on my performance testing

From: Claus Guttesen (cguttesen_at_yahoo.dk)
Date: 08/30/03

  • Next message: Tejun Huh: "Re: Performance of freeBSD 5.1" 
    Date: Sat, 30 Aug 2003 14:49:34 +0200 (CEST)
To: das@FreeBSD.ORG, freebsd-performance@freebsd.org, seanc@FreeBSD.org

    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
    _______________________________________________
    freebsd-performance@freebsd.org mailing list
    http://lists.freebsd.org/mailman/listinfo/freebsd-performance
    To unsubscribe, send any mail to "freebsd-performance-unsubscribe@freebsd.org"

  • Next message: Tejun Huh: "Re: Performance of freeBSD 5.1"