topic Re: Open VMS Run detached process query in Operating System - OpenVMS

Open VMS Run detached process query

Srikanth Arunachalam — Fri, 29 Sep 2006 19:16:48 GMT

Hi,

I need to runa detached job like
RUN/PROC = cpsmon_sysx -
/uic = [OMS_MASTER] -
/INPUT= tc_log:cpsmon.com -
/enqu=2000 -
/priv=(all,nobypass) -
/io_b=1000 -
/io_d=200 -
/extent = 20000 -
/maxi = 100000 -
/work = 50000 -
/buff = 80000 -
/file = 150 -
/page = 180000 -
/queu = 50 -
/subp = 6 -
/ast_l = 500 -
sys$system:loginout

My command file cpsmon have few parameters in it..please let me know how to submit cpsmon with parameter p1 and p2 as a detached job

Re: Open VMS Run detached process query

Steven Schweda — Fri, 29 Sep 2006 19:43:01 GMT

I don't do this, but my guess would be that
you need to create a new "temp.com" which
does something like:

$ @ tc_log:cpsmon.com 'p1' 'p2'

This seems to be what is done, for example,
in SYS$MANAGER:DECW$STARTSERVER.COM. (Look
for "decw$killserver".)

Re: Open VMS Run detached process query

Jan van den Ende — Sat, 30 Sep 2006 07:13:46 GMT

Steven gave a good solution.

Another way to achieve this is by way of Logical Names.

Define the values of your params (and I favor using meaningful names) in a table that is accessible by the detached process.
I much prefer creating a dedicated LogicalNameTable (if so desired, those can be clusterwide, in which case they survive node reboot!), but you might also decide to use the LNM$GROUP_

Now in cpsmon.com, for each "param", do a F$TRNLNM

We have found this a very effective and very flexible way to handle those kind of things, but as always,
YMMV.

hth

Proost.

Have one on me.

jpe

Re: Open VMS Run detached process query

John Gillings — Sat, 30 Sep 2006 17:34:51 GMT

Srikanth,

If you're on a late enough version of OpenVMS (8.2 or higher) you can CREATE/MAILBOX then specify that as your /INPUT. The creator process can then write the appropriate "@" command with whatever parameters you like.

$ CREATE/MAILBOX DETMAIL
$ OPEN/WRITE DETCMD DETMAIL
$ RUN/DETACHED/INPUT='F$TRNLNM("DETMAIL") ...
$ WRITE DETCMD "@tc_log:cpsmon.com ""''par1'"" ""''par2'"""
$ CLOSE DETCMD
$ DELETE/MAILBOX DETMAIL

Note that since the detached process will probably still have a channel open to the mailbox, it won't actually get deleted until the process terminates.

Make sure you get the latest patches and check that your mailboxes get deleted properly, I think some of the early implementations had trouble cleaning up.