Cache::SharedMemoryCache -- extends the MemoryCache.
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
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
my %cache_options_= ( 'namespace' => 'MyNamespace',
'default_expires_in' => 600 );
my $shared_memory_cache =
new Cache::SharedMemoryCache( \%cache_options ) or
croak( "Couldn't instantiate SharedMemoryCache" );
See Cache::Cache for the API documentation.
See Cache::Cache for the standard options.
See Cache::Cache for the default properties.
Original author: DeWitt Clinton <email@example.com>
Last author: $Author: dclinton $
Copyright (C) 2001-2003 DeWitt Clinton