Per-Entity Metadata Working Group

["Cantor, Scott" <>]

On 9/14/16, 12:20 PM, 
"
 on behalf of Tom Scavo" 
<
 on behalf of 
>
 wrote:

>    I still have a number of unanswered questions regarding the
>    distribution of per-entity metadata:
>    
>    1) Do we need preview-main-fallback servers or is a single production
>    server adequate?

Notwithstanding Nick's comment, certainly this could be accomodated in many 
ways, but I tend to believe it's useful to have this ability, at least 
preview + main anyway. Preview could perhaps only be available from a single 
source, perhaps, vs. fully redundant.

> 2) Does the server need to support HTTP Conditional GET?

Not essential but a nice to have. It's less to do with network and more with 
the fact that the software can avoid a needless re-parse and re-verify.
    
>    3) What is the range of permissible validUntil dates on each entity
>    descriptor? (we discussed this briefly on today's call)

I definitely would like to see at most a week and preferably less over time. 
The aggregate, if it's still made available for other purposes, could have a 
longer window.

> 4) Is there a cacheDuration on each entity descriptor, and if so, what is 
> its value?

Definitely needs to be set based on some kind of calculation to achieve the 
frequency of updates we want.

> 5) What is our failover strategy?

Can you explain what you mean specifically?

-- Scott