RE: is operating system always to blame, was: Ready to scrap an AS/400

[Mark Walter <mwalter@xxxxxxxxxx>]

Peter,

What if there is that outside chance that a job in normal operation could 
write xxxxx number of records or utilize more than 70% of the CPU. If the 
OS stopped it, it would be considered a bug in the OS. I know that a 
program that would suck that many machine cycles would be extremely bad 
design, but I'm sure that somewhere they exist. (Albeit, not in my shop. 
HA,HA,HA). I think we'll have to agree to disagree on this one.

Mark

-----Original Message-----
From:   Peter Dow [SMTP:pcdow@yahoo.com]
Sent:   Wednesday, July 26, 2000 5:08 PM
To:     MIDRANGE-L@midrange.com
Subject:        Re: is operating system always to blame, was: Ready to scrap an 
AS/400

Hi Mark,

Sorry, but I disagree. The operating system is in control. Or should be. 
Why
do you say "it can only warn someone"? If it can warn someone, why can't it
put the offending job on hold? Do you think the OS doesn't know which job 
is
filling up the disk? Is it impossible to put a job on hold? I'm not even
sure you need the OS to handle that situation -- someone else on the list
was asking for monitoring software that would detect when a job was at 70%
CPU utilization and several solutions were mentioned. I see no reason why
those same packages couldn't monitor disk usage and hold the offending job
until some human intervenes. If monitoring software could do it, so could
the OS.

Peter Dow
Dow Software Services, Inc.
909 425-0194 voice
909 425-0196 fax



From: Mark Walter <mwalter@netrax.net>


> Say the program loops and writes records into a data file of some sort,
>  the procedure fills up the disk. This can happen by the way. An AS/400
> query with improper joins specified will also fill up disk. The cannot
know
> what is filling up the disk, it can only warn someone that the disk is
> reached its threshold. Eventually, the machine will fail. I'd say that
this
> is not the fault of the OS.


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