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

[Matt Linton]

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."