NAME
CHI::Driver::FastMmap - Persistent interprocess cache via mmap'ed files
VERSION
version 0.59
SYNOPSIS
use CHI;
my $cache = CHI->new(
driver => 'FastMmap',
root_dir => '/path/to/cache/root',
cache_size => '1m'
);
DESCRIPTION
This cache driver uses Cache::FastMmap to store data in an mmap'ed file. It is very fast, and can be used to share data between processes on a single host, though not between hosts.
To support namespaces, this driver takes a directory parameter rather than a file, and creates one Cache::FastMMap file for each namespace.
Because CHI handles serialization automatically, we pass the raw_values
flag as 1; and to conform to the CHI API, we pass unlink_on_exit
as 0, so that all cache files are permanent.
REQUIREMENTS
You will need to install Cache::FastMmap from CPAN to use this driver.
CONSTRUCTOR OPTIONS
- root_dir
-
Path to the directory that will contain the share files, one per namespace. Defaults to a directory called 'chi-driver-fastmmap' under the OS default temp directory (e.g. '/tmp' on UNIX).
- dir_create_mode
-
Permissions mode to use when creating directories. Defaults to 0775.
Any other constructor options not recognized by CHI are passed along to Cache::FastMmap->new.
METHODS
- fm_cache
-
Returns a handle to the underlying Cache::FastMmap object. You can use this to call FastMmap-specific methods that are not supported by the general API, e.g.
$self->fm_cache->get_and_set("key", sub { ... });
SEE ALSO
AUTHOR
Jonathan Swartz <swartz@pobox.com>
COPYRIGHT AND LICENSE
This software is copyright (c) 2012 by Jonathan Swartz.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.