Time for action – adding a cache directory

So far we have learned the meaning of different parameters used with the cache_dir directive. Let's see an example of the cache directory /squid_cache/ with 50GB of free space:

cache_dir aufs /squid_cache/ 51200 32 512

We have a cache directory /squid_cache/ with 50 GB of free space with the values of L1 and L2 as 32 and 512 respectively. So, if we assume the average size of a cached object to be 16 KB, there will be 51200x1024÷(32x512x16) = 200 cached objects in each of the directories at the second level, which is quite good.

What just happened?

We added /squid_cache/ with a 50 GB free disk space as a cache directory to cache web documents on the hard disk. Following the previous instructions, we can add as many cache directories as we want, depending on the availability of space.

Cache directory selection

If we have specified multiple caching directories, we may need a more efficient algorithm to ensure optimal performance. For example, when under...