perfsonar development work

[Andreas Hanemann <>]

Hi Loukik,

Loukik Kudarimoti wrote:
> Hi,
>
> From the logs on perfSONAR, I noticed that clients such as CNM are
> requesting the measurement archive every five minutes for data about
> all links. Such clients which need to update themselves every 5
> minutes are the ideal clients which should use the "key" mechanism.
>
We agree that the store of these keys can be expected to be beneficial
for both the CNM and the service performance.
> We designed and implemented this feature to be used by such clients.
> It benefits not only the service but the client as well because the
> response will be quicker (no query to the rrd database). If you are
> worried about the expiry of the keys, you can  update the keys that
> you store regularly (say once in a day by doing metadata key request).
>
Even with the update of keys on a daily basis, our understanding is that
the client has to be prepared to "key expired" answers.
> As of now, from the logs I notice that this feature is not being used.
> I would be very happy to see the clients making use of such
> performance features provided by the service, at least the CNM.
>
Can you send us a pointer how the error messages look like if a key
cannot be found?
> Regards,
> Loukik.
>
Regards
Andreas
-- 
Andreas Hanemann, 

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