IPC::Lock::Memcached - memcached based locking
IPC::Lock::Memcached extends IPC::Lock, and uses add and delete for its atomic and unatomic methods. use IPC::Lock::Memcached; { my $lock = IPC::Lock::Memcached->new({ memcached_servers => ['localhost:11211'], }); ### following memcached tradition, spaces aren't allow in the key name ### and the user is expected to check such things themselves if($lock->lock('magic_key')) { ### do your thing } } When $lock leaves scope, $lock->unlock gets called. When called via destroy, unlock will destroy the last $key that was locked.
Using a dual 1 ghz box Local test without an extant memcached object timethese(-5, { lock => sub { my $lock = IPC::Lock::Memcached->new({ memcached_servers => ['localhost:11211'], }); if($lock->lock('coolkey')) { $lock->unlock; } } }); Benchmark: running lock for at least 5 CPU seconds... lock: 6 wallclock secs ( 4.59 usr + 0.53 sys = 5.12 CPU) @ 2302.54/s (n=11789) Local test with an extant memcached object my $lock = IPC::Lock::Memcached->new({ memcached_servers => ['localhost:11211'], }); timethese(-5, { lock => sub { if($lock->lock('coolkey')) { $lock->unlock; } } }); Benchmark: running lock for at least 5 CPU seconds... lock: 7 wallclock secs ( 4.26 usr + 0.87 sys = 5.13 CPU) @ 3844.44/s (n=19722) Pretty dang fast. In other memcached benchmarks, for me, remote calls have actually been faster than local.
Thanks to Brad Fitzpatrick for Cache::Memcached. It just works.
Earl Cahill, <cpan@spack.net>
Copyright (C) 2005 by Earl Cahill
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.7 or, at your option, any later version of Perl 5 you may have available.
To install IPC::Lock, copy and paste the appropriate command in to your terminal.
cpanm
cpanm IPC::Lock
CPAN shell
perl -MCPAN -e shell install IPC::Lock
For more information on module installation, please visit the detailed CPAN module installation guide.