Invalidating a cache

Posted by / 23-Feb-2021 10:43

The protocol needs to do the right thing for either of these possibilities.It is expected to be smart enough to dis-entangle all such race conditions.If you model the protocol using a state machine, a state machine verifier shall typically discover thousands of paths on the state diagram.The other alternative for maintaining coherency is Cache Updation, wherein the writer sends a copy of new data to each client that has read access.The log includes messages indicating requests coming from your publish server, similar to the following example: To invalidate (or flush) the Dispatcher cache without activating a page, you can issue an HTTP request to the dispatcher.For example, you can create an AEM application that enables administrators or other applications to flush the cache.The dispatcher flush is controlled by a replication agent operating on the publish instance.

You can easily test this by changing a file version back and forth between an unused version, and an older used version, and seeing the HTTP 200 and 304 responses respectively. It does a lot of the stuff you are worrying about automatically and it does handle cache invalidation by using differently named css files every time they are modified.Cache Invalidation is one of the two techniques of maintaining cache coherency in a system where multiple cores share a lower level cache.The reason why it poses a big engineering problem is due primarily to non-zero latencies of the interconnect network.I'm running into similar issues sometimes that JS and CSS is cached to long.The solution that works for me is, adding an versionnumber or timestamp of the last update to the filename as querystring.

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