File::SharedNFSLock Inter-machine locking on NFS volumes
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File::SharedNFSLock Tags

Perl module NFS locking inter-machine locking NFS volumes inter-machine

File::SharedNFSLock Description

Inter-machine locking on NFS volumes NFS (at least before v4) is evil. File locking on NFS volumes is worse. File::SharedNFSLock is a Perl module that attempts to implement file locking on NFS volumes using lock files and hard links. It's in production use at our site, but if it doesn't work for you, I'm not surprised!Note that the lock files are always written to the same directory as the original file! There is always one lock file per process that tries to acquire the lock. This module does NOT do signal handling. You will have to do that yourself.SYNOPSIS use File::SharedNFSLock; my $flock = File::SharedNFSLock->new( file => 'some_file_on_nfs', ); my $got_lock = $flock->lock(); # blocks for $timeout_acquire seconds if necessary if ($got_lock) { # hack hack hack... } $flock->unlock; # meanwhile, on another machine or in another process: my $flock = File::SharedNFSLock->new( file => 'some_file_on_nfs', ); my $got_lock = $flock->lock(); # blocks for timeout or until first process is done # ... Requirements: · Perl

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