I just read a post on the users list from someone wishing that file generator's cache validity could check dependencies of xml/xslt files which use the document() function. This is obviously unfeasible in the current structure, but may be workable if the file generator could store dependencies in the scenario I proposed with dependencies:
<snip/> > I have been looking into extending the current store/generator relationship > to allow generators to report dependencies and have the store track which > keys (however they are created) are related to which dependencies. ... -----Original Message----- From: Sylvain Wallez [mailto:[EMAIL PROTECTED]] Sent: Tuesday, May 21, 2002 11:29 AM To: [EMAIL PROTECTED] Subject: Re: [RT]: Calculating the cache key Geoff Howard wrote: >The performance of key comparison is especially important for high traffic >sites (like ours). An idea I've had to decrease this importance is: > >An *option* to have the pipeline do asynchron cache validation - if a cached >item exists, use it *then* check it's validity (or cause it to be checked) >and remove it from the store if it was expired. This is attractive to us >because we'll have many steps that will need to be checked (many of our >pages will involve 5 or 6 or more generators aggregated and included) and >the performance hit of generating and comparing all those keys is scary. >This integrates well with the external cache validity concept that Marcelo >Ochoa/DBPrism has been working on. > Geoff, this a really good use case for the need of per-pipeline choice of the pipeline implementation, which has been discussed some time ago : - webapp pipelines *must* use up-to-date content (i.e. cache validity is always checked, or no cache is used at all) - content publication pipelines don't need to be checked synchronously at each request, and the cache can be checked either periodically or through external triggers. So we end up with 3 main types of pipelines : - non-caching, - caching and synchronously validated, - caching and asynchronously validated. Thoughts ? Sylvain -- Sylvain Wallez Anyware Technologies Apache Cocoon http://www.anyware-tech.com mailto:[EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED]
