[Fwd: Re: SPAM Subject: Re: [otrs] Multiple OTRS installations, same machine]

2 May 2006

      Hello all;

I sent this to the users list but didn't get specific feedback on the 
parts of the code I was interested in, so this seems like a more 
appropriate channel.

I have two OTRS installations within a single Apache -- one in mod_perl2 
and one in plain CGI mode.  If I set the SystemIDs too close together, 
Log.pm seems to panic.

For instance, if #1 is SystemID 01 and #2 is SystemID 02, then they

conflict on memory space (it appears).

If #1 is SystemID 01 and #2 is SystemID 20, then they do not conflict.  
It looks like in Syslog.pm, shmget is using SystemID as a parameter in 
grabbing shared memory.  Am I reading this right, and can this problem 
be duplicated?

The offending line of code seems to be:

    75          $Self->{IPCSize} = $Param{ConfigObject}->Get('LogSystemCacheSize
') || 4*1024;
    76          # init session data mem (at first a dummy for RH8 workaround)
    77          shmget(($Self->{IPCKey}+1), 1, 0777 | 0001000);
    78          # init session data mem (the real one)
    79          $Self->{Key} = shmget($Self->{IPCKey}, $Self->{IPCSize}, 0777 | 
0001000) || die $!;
    80      }
    81
    82      return $Self;
    83  }
    84
    85  =item Log()

It looks like in line 79 the system is grabbing memory segments in part based on the IPCKey (System ID).  Am I understanding this code right?

-------------------------------------------------------------
Matt Linton             "So, you think there's no money
UNIX/Linux SysAdmin      to be made as a philosophy major?
ASANI Solutions, LLC     Think again!    You're still right."

Christian Schoepplein wrote:
...
Hi Matt,
On Fri, Apr 21, 2006 at 11:37:25AM -0700, Matt Linton wrote:
...
I'd like to allow multiple software groups within our single 
organization to handle their own "issue reporting" via OTRS.  Since I 
don't want to manage multiple servers, and want them each to have full 
administrative control over their own FAQ entries, customer users, etc 
-- I had planned on installing multiple OTRS installations like this:
ScriptAlias /otrs1/  /local/otrs1
ScriptAlias /otrs2/ /local/otrs2
(and so on...)
Problem is, I'm running into wierd behaviors with the secondary and 
other OTRS's.  Log.pm seems to use the OTRS ID as a function for 
grabbing memory for logging. Is that true?   If I set my server IDs "1" 
and "2" then #2 has memory conflicts, but if I set them to "1" and "20" 
then it seems fine.
You have to use different system IDS for the different OTRS instances:
$Self->{'SystemID'} = ...
I use 3 different OTRS instances (without mod_perl" and it works fine.
...
Has anyone done this before, and does anyone know how to accomplish it 
better, perhaps?
The way you like to do it is perfect, only take on the different 
SystemIDs and the different aliases in the web server configuration. 
Also do only use mod_perl for one instance.
...
Matt Linton
Ciao,
Christian
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-- 

-------------------------------------------------------------
Matt Linton             "So, you think there's no money
UNIX/Linux SysAdmin      to be made as a philosophy major?
ASANI Solutions, LLC     Think again!    You're still right."

Matt Linton

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