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COE DISCUSSION FORUM
Subject: License Problems

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Author Messages
MACKMAN

25 Mar 2008 09:38 AM

We currently use a triad of UNIX servers to serve out Catia licenses. We are experiencing loss of licenses at a remote site at certain times of the day. 1) Are there specific settings that LUM needs to have set for serving licenses over a VPN-tunnel, versus standard WAN links? 2)Is this a known issue with LUM and VPN-tunnel connections? 3) On the licensing server, what is the timeout value set to before the server drops connection to the client and retrieves the license back into the pool, and can we change this value? 4) What is the threshold for latency in LUM, and can this be adjusted at all?  Any help on these questions would be greatly appreciated.

NANCYR

25 Mar 2008 11:08 PM
Q1 and Q2: LUM does not support VPN. LUM may work with some VPN connections, but not with others.
Q3 and Q4. The license check period ("heartbeat") varies by application. Not all LUM-enabled applications support this "heartbeat" function. CATIA V4 and CATIA V5 do support this "heartbeat" function. The default "heartbeat" value for CATIA V4 is 30 minutes, and the default "heartbeat" value for CATIA V5 is 17 minutes. For CATIA V5, the license check ("heartbeat") period "Frequency" value (in minutes) can be set in Tools/Options/General/Licensing. There is a also a slide bar there for setting the approximate License Server Timeout, from a few seconds to a few minutes. Because these are CATIA V5 user settings, and not LUM network-wide settings, they can be set specifically just for the users at the remote site who are experiencing licensing problems. There is also an LUM environment variable TIMEOUT_FACTOR which can be set on a LUM client; it is a scaling factor, applicable to all LUM-enabled applications running on the client, with a default value of 1000. Values greater than 1000 increase the timeout interval, and values less than 1000 decrease it.

Nancy Rothwell
IBM PLM Technical Support, Americas

MACKMAN

26 Mar 2008 08:59 AM

Hi Nancy.  Thank you very much for the information you provided.  One final question, how do we set the LUM environment variable TIMEOUT_FACTOR on a LUM Client?  Is this done through the LUM application on is it simply setting up a normal Windows environment system variable?  Thanks again, Andy.

NANCYR

26 Mar 2008 06:11 PM
Hi Andy,

The TIMEOUT_FACTOR environment variable is described on page 226 of the LUM 4.6.8 "Using License Use Management Runtime" manual, downloadable in pdf format from http://www.ibm.com/software/lum by clicking the "Manuals" link on that web page.

It is set on a Windows client machine as a system environment variable, via Start/Control Panel/System/Advanced/Environment Variables, then click "New" in the "System variables" portion of the window. It also works on other operating system platforms. Note: Do not set this environment variable on the license server machine. It should only be set on a LUM client machine.

Nancy Rothwell
IBM PLM Technical Support, Americas
MACKMAN

27 Mar 2008 06:51 AM

Thanks again.  What actual time does the 1000 value represent for the TIMEOUT_FACTOR?  Not sure what I should up this value to (1200, 1500, etc).  What does it actually mean if the value is 1200.  I read the section in the manual that I downloaded but it was not clear.  I don't want to create more problems.  Thanks, Andy

NANCYR

28 Mar 2008 09:42 PM
Hi Andy,

The TIMEOUT_FACTOR environment variable is simply a linear ratio, with a default value of 1000. For example, if you set the TIMEOUT_FACTOR environment variable on the client to 2000, the client will wait about twice as long to acquire a license from the LUM server before giving up and declaring a timeout. To some degree, this parameter is just a crutch.... the underlying problem that is causing the original timeout problem should really be investigated and fixed. It might be caused by networking issues between the client and the server, or it might be caused by a server overload condition. Extending the wait on the client side may provide some measure of relief, but it is more of a "patch" than a true solution to the problem.

Nancy Rothwell
IBM PLM Technical Support, Americas
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