On Thu, 2005-04-28 at 11:45, Emmanuel Doguet wrote:
> Dave Shield wrote:
> > [ First - *please* don't mail me privately....
>
> I see it after send (my owns ML work with a reply :P), sorry.
Don't worry - that's a standard block of text that I include
whenever this happens. I'm well aware that it's easy to reply
privately (either by mistake, or in ignorance).
I only get annoyed with the people who *consistently*
contact me privately.
> I mean, that I must fill data on my table
> for each 'Walk' and not at the init of the daemon.
OK - then the cache helper is an ideal solution for you.
That's pretty much what this does.
It will load your data the first time that a query arrives
(*not* when the agent starts up), and will release and re-load
it whenever another request arrives, and the cached data is
"too old" to be useful. You can specify how long "too old" is.
If you're running an "snmpwalk" command (and the cache timeout
is chosen sensibly), then this will probably all be serviced
by a single load.
That contrasts with loading the table within the get_{first,next}
hooks, where it will typically be reloaded for *each* value
individually.
> > What would be the problem in using the cache handler to load
> > the table data (retaining it for 5 seconds, say), and letting
> > the free routine release it again, when this time had expired?
>
> I don't know & see that on NetSnmp documentations, have an URL?
The main documentation for this helper is at
http://www.net-snmp.org/dev/agent/group__cache__handler.html
There isn't an example, I'm afraid.
(At least not yet....)
Dave
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