On Wed, 19 Jun 1996 10:48:15 EDT Bob Zenhausern <[log in to unmask]>
said:
 
>The lists here are averaging 1800 messages to 336k subscribers. I expect
>some major increases and want to be prepared for about 500k per day.
 
Your little  VMS server will  do that just fine.  Here are the  stats for
your most busy day in the last week:
 
Total: 389,957 deliveries
 
+--------------------------+--------------------------+------------+
|  Average delivery time   |     Max delivery time    | For...     |
+--------------------------+--------------------------+------------+
|      6 sec       (00:06) |      9 sec       (00:09) | First 50%  |
|      6 sec       (00:06) |     11 sec       (00:11) | First 60%  |
|      7 sec       (00:07) |     14 sec       (00:14) | First 70%  |
|      9 sec       (00:09) |     22 sec       (00:22) | First 80%  |
|     11 sec       (00:11) |     52 sec       (00:52) | First 90%  |
|     15 sec       (00:15) |    193 sec       (03:13) | First 95%  |
|     18 sec       (00:18) |    419 sec       (06:59) | First 96%  |
|     24 sec       (00:24) |    801 sec       (13:21) | First 97%  |
|     33 sec       (00:33) |   1107 sec       (18:27) | First 98%  |
|     54 sec       (00:54) |   3756 sec     (1:02:36) | First 99%  |
|    372 sec       (06:12) | 431337 sec (4d 23:48:57) | All (100%) |
+--------------------------+--------------------------+------------+
 
Believe  me, it's  hard to  get  better numbers.  In fact  I wouldn't  be
surprised  to hear  that you  have the  best figures  worldwide for  your
workload!  I  know it's  an  old  machine  and  the ~125  specint  aren't
particularly impressive nowadays,  but you are only using  about 3.5 days
of CPU time a month and a  faster processor wouldn't help. You can always
upgrade the processor card when this becomes a problem.
 
With all the SJU lists moved to the box I would increase storage from 64M
to 128M. I would also consider  buying one of these $2-3k RAID controller
with battery backed  up writeback cache and reconfiguring the  disks as a
RAID 0+1 array for  the spool and a RAID 5 for the  rest, to improve both
performance and reliability. You have room for 7 disks in the box, ie you
can add 3 before you have to start replacing the old 1G drives.
 
>Data base searching is a critical  factor in the Information Center I am
>developing on the WWW.
 
This is available in 1.8c, along with a WWW search interface.
 
  Eric