On Tue, 12 Oct 2004 18:40:50 +0530 Karthikeyan wrote:
KN> 1. I have some api's about the mib data which I need to call in a common
KN> place in a loop so that the current data will get updated frequently.
This can be done with a netsnmp_cache helper. For examples, see the following
mib modules (or grep through the code for 'netsnmp_cache'):
agent/mibgroup/agent/nsCache.c
agent/mibgroup/mibII/tcpTable.c
agent/mibgroup/mibII/tcp.c
You might want to extract the cache_helper from 5.2, which will allow you to
have the cache refreshed periodically. Otherwise, you can use a timer in 5.1.2
to achieve a similar effect.
KN> the first time, data should be stored in the agent memeory for all the
KN> tables when we start the agent ( as like snmpd.conf) . Then it should
KN> update the latest data after a certain time interval delay.
Then you want to look into the persistent store routines. You can find an
example in
agent/mibgroup/disman/mteTriggerTable.c
You'll need to add a timer to periodically call the persistent store callbacks.
KN> Also, do we have the multi-threading support in net-snmp? I feel the best
KN> way to solve this is by using the threading concept so that filling the
KN> table data structures and the snmp process can happen parallely.
No. But you should be able to use shared memory and a non-snmp separate
process/thread to keep your cache up to date. Sorry, no examples of that.
--
Robert Story; NET-SNMP Junkie <http://www.net-snmp.org/>
<irc://irc.freenode.net/#net-snmp>
Archive: <http://sourceforge.net/mailarchive/forum.php?forum=net-snmp-coders>
You are lost in a twisty maze of little standards, all different.
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