chi::driver::fastmmap(3pm) [debian man page]

CHI::Driver::FastMmap(3pm)				User Contributed Perl Documentation				CHI::Driver::FastMmap(3pm)

NAME

       CHI::Driver::FastMmap - Persistent interprocess cache via mmap'ed files

VERSION

       version 0.54

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

       CHI

AUTHOR

       Jonathan Swartz <swartz@pobox.com>

COPYRIGHT AND LICENSE

       This software is copyright (c) 2011 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.

perl v5.14.2							    2012-05-30						CHI::Driver::FastMmap(3pm)

CHI::Benchmarks(3pm)					User Contributed Perl Documentation				      CHI::Benchmarks(3pm)

NAME

       CHI::Benchmarks - Benchmarks of CHI and non-CHI drivers

VERSION

       version 0.54

DESCRIPTION

       These benchmarks were created by running

	  etc/bench/bench.pl -d . -t 10 -x

       for CHI 0.42, on OS X v10.6.6, 2.2 GHz Intel Core 2 Duo, Perl 5.12.2.

       For each cache, bench.pl does repeated gets and sets of a data structure for at least 10 seconds and measures the wallclock time per
       operation.

       These numbers should just be used as a rough guideline! Actual results will vary widely depending on system, get/set pattern, actual values
       being set, the proper tuning of memcached/mysql, etc. For best results run the benchmark script (available in this distribution) on your
       own system.

	  Cache 	       Get time Set time Description
	  cache_ref	       0.009ms	0.008ms  Cache::Ref (CART)
	  chi_memory_raw       0.019ms	0.036ms  CHI::Driver::MemoryRaw
	  cache_fastmmap       0.022ms	0.040ms  Cache::FastMmap
	  chi_memory	       0.042ms	0.066ms  CHI::Driver::Memory
	  chi_berkeleydb       0.052ms	0.073ms  CHI::Driver::BerkeleyDB
	  chi_fastmmap	       0.057ms	0.087ms  CHI::Driver::FastMmap
	  cache_cache_memory   0.065ms	0.070ms  Cache::MemoryCache
	  cache_memcached_fast 0.097ms	0.131ms  Cache::Memcached::Fast
	  chi_dbi_sqlite       0.112ms	1.659ms  CHI::Driver::DBI (sqlite)
	  cache_memcached_lib  0.118ms	0.156ms  Cache::Memcached::libmemcached
	  chi_file	       0.118ms	1.138ms  CHI::Driver::File
	  chi_memcached_fast   0.138ms	0.178ms  CHI::Driver::Memcached::Fast
	  chi_memcached_lib    0.151ms	0.202ms  CHI::Driver::Memcached::libmemcached
	  chi_dbi_mysql        0.236ms	0.273ms  CHI::Driver::DBI (mysql)
	  cache_memcached_std  0.238ms	0.180ms  Cache::Memcached
	  chi_memcached_std    0.279ms	0.235ms  CHI::Driver::Memcached
	  cache_cache_file     0.481ms	1.391ms  Cache::FileCache

SEE ALSO

       CHI

AUTHOR

       Jonathan Swartz <swartz@pobox.com>

COPYRIGHT AND LICENSE

       This software is copyright (c) 2011 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.

perl v5.14.2							    2012-05-30						      CHI::Benchmarks(3pm)