Adrian, indeed, I'm asking because I'm looking at using Varnish as a proxy cache in front of Fuseki.
However, best practices [1] say: 6.2 Cache policy Define a cache policy A cache / expiration policy is the rationale behind cache control for every resource served by HTTP/1.1 servers.. Content managers should decide, globally and/or locally, what can or can not be cached, how long caches should keep the document before trying to get a new version, etc. These decisions may be made depending on the frequency at which the documents may be updated. Allow the Content Manager to set up cache control according to a Cache Policy The content manager should be able to set the max-age parameter for any resource served according to a cache policy. 6.3: Caching generated content Provide actual caching information for content generated dynamically Most dynamic content generation systems act as if the documents they generate and serve were "fresh" (i.e as if the resource was last modified at the date it is served), whether the information itself is, or not. This is a harmful lie for caching engines and should be avoided. Regardless of the technology used, it should be possible to provide age information by retrieving the actual information from whatever source is used to generate the dynamic content: file,database, etc. https://www.w3.org/TR/chips/#gl6 On Thu, Mar 19, 2020 at 2:50 PM Adrian Gschwend <[email protected]> wrote: > > On 19.03.20 12:05, Martynas Jusevičius wrote: > > > Cache-Control: must-revalidate,no-cache,no-store > > Pragma: no-cache > > YMMV, but my take here is: > > - a SPARQL endpoint should always return the latest results > - If caching is needed, it should be transparent for the user, as in the > SPARQL endpoint can have its caching indexes internally > - it is the middleware/developers job to add HTTP caching layers where > appropriate > > We do that with our SPARQL proxy for example, the middleware there sets > caching headers that are configurable. > > And as usual, cache invalidation is the hard part :) > > regards > > Adrian
