Re: pass-through feature seems to cache data

....I've tested this feature with the latest version of net-snmp running
on Solaris 9:

bash-2.05# /usr/local/sbin/snmpd -version

NET-SNMP version: 5.2.1.2
Web: http://www.net-snmp.org/
Email: net-snmp-coders@lists.sourceforge.net


....and I confirm that 'pass' directive caches data for about 30 seconds.

Here is a sample in my snmpd.conf:

pass .1.3.6.1.4.1.92400.1.6.1.1 /etc/snmp/sh/ApplicationStatus.sh

Regards,
--Alexandre

Roman Medina-Heigl Hernandez wrote:

>I have the same problem too. Snmpd seems to refresh cache when it
>receives a SET request, which seems logical to me. The problem happens
>when you have other external methods of updating values which should be
>returned by Snmpd (for instance, if you have data store on a database,
>and want Snmpd to return its values; if database is updated Snmpd
>doesn't notice the change and cache is not refreshed).
>
>I haven't tested it but newer versions doesn't perform caching. At least
>according to the Faq:
>
>http://net-snmp.sourceforge.net/docs/FAQ.html
>...
>What's the difference between 'exec', 'sh' and 'pass'?
>-----------------------------------------------------
>...
>Note that with the 4.2.x and 5.0.x lines, return values are cached
> within the agent for 30 seconds, rather than invoking the command
> for every request. This does not hold for the 5.1.x agent.
>
>Regards,
>-Roman
>
>
>Alexandre Pashai wrote:
>
>
>>hi all,
>>
>>thep ass-through feature of net-snmp works quite well.
>>But, it seems to cache data for 30 seconds while i expect it to have a
>>"real-time" behavior...
>>
>>Is it possible for net-snmp to exec the script on each snmpget request ?
>>
>>Thanks for answers.
>>
>>Alexandre
>>
>>
>
>
>



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