I was thinking if caching can be controlled by a flag defined in Tcl
configuration file. Anyone who is not interested in caching should be
able to turn it off.
Regards,
Rohit
Juergen Schoenwaelder wrote:
>
> >>>>> Rohit Kerhalkar writes:
>
> Rohit> How can I avoid caching in the 'Tnm::netdb hosts name
> Rohit> ip_address' command. The requirement is that /etc/hosts may
> Rohit> change and I should be able to retrieve the new name of the
> Rohit> same IP Address if I am running netdb in a loop.
>
> There is currently no interface to access or control the name cache.
> Note that all name lookups go through the same cache - not only the
> Tnm::netdb command.
>
> I certainly see the value of being able to control the cache. The
> interesting question is what the API addition should look like. I
> think it would actually be nice to be able to retrieve the whole cache
> and to write it back. One way to do this is to export the cache as a
> Tcl variable. Another option would be to add Tnm::xxx commands to
> interface with the cache.
>
> Another option would be to add a time stamping mechanism so that cache
> entries are validated regularily. In this case, we only need to export
> the lifetime parameter for cache entries. Perhaps this is even better
> since most applications won't regularily flush the cache anyway.
>
> Any comments? Proposals? Patches?
>
> /js
>
> --
> Juergen Schoenwaelder Technical University Braunschweig
> <schoenw@ibr.cs.tu-bs.de> Dept. Operating Systems & Computer Networks
> Phone: +49 531 391 3289 Bueltenweg 74/75, 38106 Braunschweig, Germany
> Fax: +49 531 391 5936 <URL:http://www.ibr.cs.tu-bs.de/~schoenw/>
>
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