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Date:      Mon, 5 Apr 1999 08:15:21 -0700 (PDT)
From:      Tom <tom@uniserve.com>
To:        Brad Knowles <blk@skynet.be>
Cc:        Mike Tancsa <mike@sentex.net>, doka@triton.kiev.sovam.com, freebsd-stable@FreeBSD.ORG
Subject:   Re: benchmark program
Message-ID:  <Pine.BSF.4.02A.9904050812500.9618-100000@shell.uniserve.ca>
In-Reply-To: <19990405163628.014925@relay.skynet.be>

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On Mon, 5 Apr 1999, Brad Knowles wrote:

>     I'm curious.  I looked at bonnie, and it creates a huge file (with
> (2**31)-1 problems), which it then reads and re-writes with multiple
> child processes (unless I misunderstand the man page).

  What (2**31) -1) problem?

>     However, this exercises the buffer cache but does not exercise the

  Since the file is large, the cache is not useful.

> creation of lots of small files, directories and subdirectories, etc...
> (e.g., the kind of traffic that one might see with a heavily loaded news
> server), and this misses much of the potential performance enhancements
> of "soft updates", etc....

  Yes, bonnie is situated towards testing raw io performance.

>     I'm wondering if anyone has heard of any benchmark programs that are
> more oriented towards some sort of simulation of a heavily loaded news
> server, or the kind of load you might see with a heavily loaded anonymous
> ftp server (both during the mirror updates and during heavy reader load)?
>  Are any of these benchmarks portable to other platforms?

  Well, it shouldn't be hard to create one.


Tom



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