Relation between ldes:pollingInterval and header Cache-Contol: maxAge ?

[rorlic]

Previously (and still?) the Cache-Control header specifies the TTL (data freshness) of the returned LDES node (typically 60 seconds for mutable and 1 week for immutable nodes), i.e. the max-age.

The new ldes:pollingInterval on a ldes:EventStream is defined as:

... amount of seconds (xsd:integer) to set the time to keep between synchronization runs.

Should this be the same value as max-age for mutable nodes?
Should this value vary per event stream?

[pietercolpaert]

We discussed in the current algorithm the max-age will not be used by the client. It’s better not to set max-age as you want a server cache to always reflect immediately the new state on all pages, and thus only rely on ETags.