Hierarchical caching
Hierarchical caching
Until now, we supported several types of cache storages. Some of these utilize the file system to store data, others can use APC or Memcache. While file based caches are usually large, since disk space is getting cheaper and cheaper, they are also much slower than memory based caches. RAM caches in contrast are blazingly fast, but memory is still much more limited than disk space. Therefore it is sensible, that the most important data for a website is stored in memory while less important stuff gets cached on the disk.
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