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Installation occurs when there is no service worker installed in the browser for the web app, or if there is an update to the service worker. Activation occurs when all of the PWA's pages are closed, so that there is no conflict between the previous version and the updated one. The lifecycle also helps maintain consistency when switching among ...
The cache manifest file is a text file located in another part of the server. It must be served with content type text/cache-manifest [7] The attribute manifest="<path>" must be added to the html element in order for the cache manifest file to work. [7] Example:
Cache hierarchy, or multi-level cache, is a memory architecture that uses a hierarchy of memory stores based on varying access speeds to cache data. Highly requested data is cached in high-speed access memory stores, allowing swifter access by central processing unit (CPU) cores.
A forward cache is a cache outside the web server's network, e.g. in the client's web browser, in an ISP, or within a corporate network. [3] A network-aware forward cache only caches heavily accessed items. [4] A proxy server sitting between the client and web server can evaluate HTTP headers and choose whether to store web content.
The LAMP stack with Squid as web cache.. Squid is a caching and forwarding HTTP web proxy.It has a wide variety of uses, including speeding up a web server by caching repeated requests, caching World Wide Web (WWW), Domain Name System (DNS), and other network lookups for a group of people sharing network resources, and aiding security by filtering traffic.
The Internet Cache Protocol (ICP) is a UDP-based protocol used for coordinating web caches.Its purpose is to find out the most appropriate location to retrieve a requested object in the situation where multiple caches are in use at a single site.
The ICN is a network level solution hence the existing distributed network cache management schemes are not well suited for ICN. [3] In the supercomputer environment, distributed cache is typically implemented in the form of burst buffer. In distributed caching, each cache key is assigned to a specific shard (a.k.a partition).
Thus, cache stampede reduces the cache hit rate to zero and keeps the system continuously in congestion collapse as it attempts to regenerate the resource for as long as the load remains very heavy. To give a concrete example, assume the page in consideration takes 3 seconds to render and we have a traffic of 10 requests per second.