Module kismet_cache::raw_cache [−][src]
Expand description
The raw cache module manages directories of read-only files
subject to a (batched) Second Chance eviction policy. Calling
prune deletes files to make sure a cache directory does not
exceed its capacity, in file count. The deletions will obey a
Second Chance policy as long as insertions and updates go through
insert_or_update or insert_or_touch, in order to update the
cached files’ modification times correctly. Opening the cached
file will automatically update its metadata to take that access
into account, but a path can also be touched explicitly.
This module implements mechanisms, but does not hardcode any policy… except the use of a second chance strategy.
Functions
Consumes the file from and publishes it to the raw cache file
to, a file directly under the raw cache directly, only if that
file does not already exist.
Consumes the file from and publishes it to the raw cache file
to, a file directly under the raw cache directory.
Attempts to prune the contents of cache_dir down to at most
capacity files, with a second chance policy.
Sets the access bit to true for the file at path: the next time
that file is up for eviction, it will get a second chance. Returns
true if the file was found, false otherwise.