On Thu, 27 Jan 2005, Mike Tancsa wrote: > >I/O (reads, writes at fairly large multiples of the sector size -- 512k is > >a good number) and small I/O size (512 bytes is good). This will help > >identify the source along two dimmensions: are we looking at a basic > >storage I/O problem that's present even without the file system, or can we > >conclude that some of the additional extra cost is in the file system code > >or the hand off to it. Also, with the large and small I/O size, we can > >perhaps draw some conclusions about to what extent the source is a > >per-transaction overhead. > > Apart from postmark and iozone (directly to disk and over nfs), are > there any particular tests you would like to see done ?
Just to get started, using dd to read and write at various block sizes is probably a decent start. Take a few samples, make sure there's a decent sample size, etc, and don't count the first couple of runs. Robert N M Watson _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
