
Paul, It is slow changing in our environment. I agree in principal that different infrastructures may need different Validity values for different entities. JP
On Apr 20, 2015, at 1:03 PM, Paul Millar <paul.millar@desy.de> wrote:
Hi JP,
On 20/04/15 15:45, JP Navarro wrote:
So slow changing information, such as ApplicationsEnvironment, may have long Validity and we would want the information to be considered valid even during an extended outage, even though during normal operations it might be refreshed hourly.
OK, but why is ApplicationsEnvironment slow-changing?
With cloud environments and technologies like VMCatcher, it's possible for sites to acquire new potential applications environment very quickly and often.
I'm still wondering whether there really are "intrinsic" Validity values, as Stephen seems to suggests.
The lack of clarify in the spec leads me to believe that we should produce a best practice on setting Validity based on an agreed to set of use cases (what behaviors we want to be able to support based on Validity values).
I think this is a good idea -- I mentioned this in a different scope: as a "processing model" document.
In general such a document would describe how information gets into GLUE-2 (which seems to be lacking in GLUE-2). It would also describe CreationTime and Validity and what expectations exist (if any) on clients when processing the information.
HTH,
Paul.
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