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Non-matching Query Sources — Agent synchronization can be used between agents which are using
different Query Source methods.
About the SSO Agent cache
By default, the SSO Agent caches user information for 60 seconds, with a range of 30–600 seconds.
The cache settings can be overridden from the Windows Registry. To disable caching (cache refresh time = 0),
edit the Registry and set the REFRESHTIME value to 0. If the cache refresh rate is set to zero seconds, user
information is fetched from the workstation for every request from the Dell SonicWALL appliance.
The appliance default is to time out after 10 seconds and to retry up to six times, so the agent receives multiple
requests from it if a NetAPI request is slow to complete. The agent does not initiate a new NetAPI request if the
previous one is still going, but there might be situations where using the cache can help and having it disabled
could be a small disadvantage:
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If a NetAPI request happens to take a multiple of 10 seconds, then the agent's reply could cross over with
a request retry from the appliance. This would cause the agent to initiate another NetAPI request where,
if using a non-zero refresh rate for the cache, it would simply repeat the last reply from its cache.
•
If a reply from the agent is somehow lost, the appliance would re-send it after 10 seconds and the agent
would make another NetAPI request where otherwise it would reply from its cache.
When using the SSO Agent cache, be sure to consider the following:
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No caching (refresh time set to zero) in the agent gives faster detection of changes in user information,
but using the cache avoids possible unnecessary extra NetAPI/WMI requests when problems occur.
•
If significant numbers of NetAPI/WMI errors are being shown in the statistics, then setting the cache
refresh time to about 60 seconds might help to reduce them.
•
The agent's cache refresh time should never be set greater than the user polling period set on the
appliance.
Dell SonicWALL Directory Services Connector 3.7
Administration Guide
8
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