🚀 go-pugleaf

I wrote:
> Although the load isn't constant over 24 hours, it doesn't vary as much
> as you might think:

Marc Horowitz <marc@MIT.EDU> writes:
}I see a peak when 9-5'ers get in in the morning, and another peak when
}students get out of class.  And the fact that students have no
}discernible daily cycle accounts of the 1000+ requests at every hour
}of the day.  I doubt intel would have such a distribution.

Well, I did a little more work -- I added code in our Kerberos server to
measure the time from request-arrival to reply-departure.  I'll let
it run Monday for some real data, but here's what the first 6 minutes
of running it this evening gave (yes, another gruesome ascii chart):

     90+             *               Time from Request to Reply
       |             *                 (in 256ths of a second)
     80+             *
       |             *
     70+             *
       |             *
 C   60+             *
 o     |             *
 u   50+             *
 n     |             *
 t   40+             *
       |           * *
     30+           * *
       |           * *
     20+           * * *
       |           * * *
     10+           * * *
       |           * * *           * * *   * * *
      0+-*-*-*-*-*-+-+-+-*-*-*-*-*-+-+-+-*-+-+-+-*-*-*-*-*-*-*-*-*-*-*-*-*-
         0 1 2 3 4 5 6 7 8 9 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 3
                             0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2

As you can see, it generally takes our server (an 8MB DS2100 [~8 Specmarks]
with a not-very-fast RZ55 disk) about 6/256 (0.023) sec to service a request.
One might hypothesize that using a modern workstation as a Kserver you should
be able to handle more than 100 requests per second.  I suppose if you needed
more oomph, you could rewrite the server to be multi-threaded (*shudder*).

John
-- 
John Hascall                   ``An ill-chosen word is the fool's messenger.''
Systems Software Engineer
Project Vincent
Iowa State University Computation Center  +  Ames, IA  50011  +  515/294-9551