Cache::SharedMemoryCache(3pm) User Contributed Perl Documentation Cache::SharedMemoryCache(3pm)NAME
Cache::SharedMemoryCache -- extends the MemoryCache.
DESCRIPTION
The SharedMemoryCache extends the MemoryCache class and binds the data store to shared memory so that separate process can use the same
cache.
The official recommendation is now to use FileCache instead of SharedMemoryCache. The reasons for this include:
1) FileCache provides equal or better performance in all cases that we've been able to test. This is due to all modern OS's ability to
buffer and cache file system accesses very well.
2) FileCache has no real limits on cached object size or the number of cached objects, whereas the SharedMemoryCache has limits, and rather
low ones at that.
3) FileCache works well on every OS, whereas the SharedMemoryCache works only on systems that support IPC::ShareLite. And IPC::ShareLite
is an impressive effort -- but think about how hard it is to get shared memory working properly on *one* system. Now imagine writing a
wrapper around shared memory for many operating systems.
SYNOPSIS
use Cache::SharedMemoryCache;
my %cache_options_= ( 'namespace' => 'MyNamespace',
'default_expires_in' => 600 );
my $shared_memory_cache =
new Cache::SharedMemoryCache( \%cache_options ) or
croak( "Couldn't instantiate SharedMemoryCache" );
METHODS
See Cache::Cache for the API documentation.
OPTIONS
See Cache::Cache for the standard options.
PROPERTIES
See Cache::Cache for the default properties.
SEE ALSO
Cache::Cache, Cache::MemoryCache
AUTHOR
Original author: DeWitt Clinton <dewitt@unto.net>
Last author: $Author: dclinton $
Copyright (C) 2001-2003 DeWitt Clinton
perl v5.12.4 2009-03-01 Cache::SharedMemoryCache(3pm)
Check Out this Related Man Page
Cache::Null(3pm) User Contributed Perl Documentation Cache::Null(3pm)NAME
Cache::Null - Null implementation of the Cache interface
SYNOPSIS
use Cache::Null;
my $cache = Cache::Null->new();
See Cache for the usage synopsis.
DESCRIPTION
The Cache::Null class implements the Cache interface, but does not actually persist data. This is useful when developing and debugging a
system and you wish to easily turn off caching. As a result, all calls return results indicating that there is no data stored.
CONSTRUCTOR
my $cache = Cache::Null->new( %options )
The constructor takes cache properties as named arguments, for example:
my $cache = Cache::Null->new( default_expires => '600 sec' );
See 'PROPERTIES' below and in the Cache documentation for a list of all available properties that can be set. However it should be noted
that all the existing properties, such as default_expires, have no effect in a Null cache.
METHODS
See 'Cache' for the API documentation.
SEE ALSO
Cache
AUTHOR
Chris Leishman <chris@leishman.org>
Based on work by DeWitt Clinton <dewitt@unto.net>
COPYRIGHT
Copyright (C) 2003-2006 Chris Leishman. All Rights Reserved.
This module is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either expressed or implied. This program is free software;
you can redistribute or modify it under the same terms as Perl itself.
$Id: Null.pm,v 1.4 2006/01/31 15:23:58 caleishm Exp $
perl v5.12.4 2011-08-05 Cache::Null(3pm)
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