William A. Rowe, Jr. wrote:
And, of course, inserting the hit once it's composed is important, and can happen in parallel (3 clients looking for the same, and then fetching the same page from the origin). But it's harmless if the insertion is mutex protected, and the insertion can only happen once the page is fetched complete.
in the case of mod_disk_cache the way I would do it is to have a deterministic tempfile rather than user apr_tempfile and opening it EXCL.
-- Brian Akins Lead Systems Engineer CNN Internet Technologies
