Re: omset should never be used for application purposes
One should generally use /opt/fox/bin/tools/omsetimp instead of omset.
The caveat with it is that it eliminates broadcasts by placing the compound
name and the corresponding address in the IMPORT table.
The IMPORT table is 100 entries by default and it can be filled.
The IMPORT table usage can be monitored by using 'show_params'.
The size of the IMPORT table can be increased by following the procedure
described either of the following manuals:
* B0193MJ - 50 Series Configurable Operating System and
* B0193ND - System Administration Guide for 50 Series Systems (Solaris
2.X)
Regards,
Alex Johnson
10707 Haddington
Houston, TX 77043
713.722.2859 (office)
713.722.2700 (switchboard)
713.932.0222 (fax)
[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
-----Original Message-----
From: Sieling, Marcel [SMTP:[EMAIL PROTECTED]]
Sent: Tuesday, March 20, 2001 6:50 AM
To: 'Foxboro DCS Mail List'
Subject: crontab issues and other useful information
Hi,
>I reset accumulators as follows by adding the following
>line to the the scheduler cron table
> 1 6 * * * /opt/fox/bin/tools/omset -v -b T
<COMPUND_NAME>:<ACCUM_NAME>.RESET
>You will need to write an application to clean up the cron
>logs periodically to conserve disk space.
Let me make two notes on this statements:
1.) omset should never be used for application purposes, if it can
be
avoided. The use of omset (omcrt, omdel, omfnd, omget etc.) produces
Broadcast Messages on the Nodebus, which can very easily overload
the
system, especially in large systems, because Broadcasts are sent to
all
stations.
2.) The cron logs can be kept from growing if output is sent to some
device
or file or /dev/null in the crontab. Of course then you can't look
at them
anymore to investigate in case of problems. But often this is a nice
solution for every days work and only in case of problems you change
the
redirection to a file. Since cron is running the cron jobs in a
bourne
shell, the appropriate statement would look like this:
> 1 6 * * * /opt/fox/bin/tools/omset -v -b T
<COMPUND_NAME>:<ACCUM_NAME>.RESET >/dev/null 2>&1 &
In case you want to see only errors and not the regular messages try
this:
> 1 6 * * * /opt/fox/bin/tools/omset -v -b T
<COMPUND_NAME>:<ACCUM_NAME>.RESET >/dev/null
2>/usr/tmp/my_phantastic_logfile &
BTW: Did you know, where the dust in long used computers is coming
from?
Well, it's pretty simple and obvious: All data being sent to
/dev/null ist
being transformed into thermal energy, because it can not disappear
from the
world without being transformed to something else. Now (as every
physics
student knows) thermal energy corresponds to mass with the famous
equation
E=mc^2 from Albert Einstein. So all the thermal energy is
transformed to
mass and that's where the dust in computers comes from. ;-))
Now you know. ;-)
PS: Don't tell my boss I'm wasting time writing such emails. ;-))
best regards -
Marcel Sieling
Systems Technologies
FOXBORO Deutschland GmbH
Heerdter Lohweg 53 - 55
40549 Duesseldorf
Tel.: +49 (0)211 5966-171
Fax: +49 (0)211 5966-104
Mobile: +49 (0)172 2673077
E-Mail: [EMAIL PROTECTED]
http://www.foxboro-deutschland.de
Private Home: http://www.powerslider.de
> -----Urspr�ngliche Nachricht-----
> Von: Freddy Why [SMTP:[EMAIL PROTECTED]]
> Gesendet am: Freitag, 16. M�rz 2001 10:36
> An: Foxboro DCS Mail List
> Betreff: RE: Accumulator Block
>
> Loyd,
>
> I reset accumulators as follows by adding the
following
> line to the the scheduler cron table
> 1 6 * * * /opt/fox/bin/tools/omset -v -b T
> <COMPUND_NAME>:<ACCUM_NAME>.RESET
> You will need to write an application to clean up
the cron
> logs periodically to conserve disk space.
> The above works for 50 series server , for 20 series
the
> application 'omset' is in directory /usr/fox/bin/tools
>
> Regards,
>
>
> Freddy Why
>
> AFH Devers - Engineering Services South Africa
> A division of Protea Data Systems
>
>
> Email Address: [EMAIL PROTECTED]
> <mailto:[EMAIL PROTECTED]>
> Website: http://www.protea.co.za
<http://www.protea.co.za>
>
> Telephone Number:
> (+27) (11) 719-5750 (Direct)
> (+27) (11) 719-5700 (Switchboard)
> (+27) (82) 7747845 (Mobile)
> (+27) (11) 887-8757 (Fax)
>
> Address:
> 26 Sixth Street, Wynberg, Sandton
> P.O.Box 707, Bramley, 2018
>
> The information transmitted is intended only for the person or
entity to
> which it is addressed and may contain confidential and/or
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> -----Original Message-----
> From: Heath, Graham
> [SMTP:[EMAIL PROTECTED]]
> Sent: Friday, March 16, 2001 10:15
AM
> To: 'Foxboro DCS Mail List'
> Subject: RE: Accumulator
Block
>
> suggest using the TIM command which returns
the
> number od seconds since
> Midnight date I say RTFM.
>
> regds
>
>
>
> -----Original Message-----
> From: Loyd Greer [mailto:[EMAIL PROTECTED]]
> Sent: 15 March 2001 1:31
> To: Foxboro DCS Mail List
> Subject: Accumulator Block
>
>
> Hi to the list.
> I would like to clear (reset) an
> accumulator block at 0600 every
> day with the system clock or TOD. If this
can be
> done, I would appreciate
> any suggestions on how to do it.
>
> Thanks in advance
> Also thanks to Joe Gale for help on a
Weather
> Station Display.
> Loyd Greer
> Great Lakes Chem.
>
>
>
>
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