Date: Fri, 3 Mar 1995 22:50:40 -0800 From: "Russell L. Carter" <rcarter@geli.com> To: current@FreeBSD.org Subject: Re: "feel" of recent systems Message-ID: <199503040650.WAA18979@geli.clusternet>
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Date: Fri, 3 Mar 1995 22:03:09 -0800
From: "Russell L. Carter" <rcarter>
To: davidg@Root.COM
Subject: Re: "feel" of recent systems
|From: David Greenman <davidg@Root.COM>
|Reply-To: davidg@Root.COM
|Date: Fri, 03 Mar 1995 21:44:58 -0800
|Sender: root@corbin.Root.COM
|
|>I wonder if anybody has noticed a tad bit of hesitancy in the system
|>since a few days ago. It has revived a little nostalgia in
|>me, since the system I've always thought of as being the very best
|>at running heavy loads: CRI Cray Y-MPs running UNICOS 6.1+, had
|>the same feel; could anybody improving the system comment
|>on their philosophy for doing these changes? Does the overall
|>system throughput improve?
|
| There are multiple bugs in several parts of the system that could be
|causing your specific problem. The NCR driver has been changing, for instance,
#1, the hesitancy is *not* a problem. (IMHO)
|and this might have something to do with it. ...and of course there are the
|problems with buffer management/directory caching that we still haven't found
|an optimal solution for. We always strive to strike the best balance between
|overall performance and responsiveness...but -current isn't production code,
#2, Who claimed it was, or ever should be? I take jkh's representations
to heart.
|and we make no representations that it is. If you could be more specific
|about certain kinds of operations that appear slower, this would help us
#3, (This will come off the wrong way, but damn the torpedos:)
Use the system dammit, and you'll notice the delays...
|find the problems (I saw your Bonnie results...these really aren't very
|useful by themselves, however, as they are affected too much by local disk
|fragmentation).
#4, Wrong! Nothing personal intended!!!!!!
I've used these on a couple of dozen systems, running a lot of different
unices, and if they had susceptibilities I would smoke them out myself.
I have absolutely nothing to gain by using inaccurate tools.
If you're trying to say the scsi system isn't moderately broken, performance
wise, since the 021095-SNAP, I'd really like to know why.
Regards,
Russell
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