04-05-2012
Perl NFS file locking
Got a weird problem.
I have a user that inherited a data processing system written in Perl. The system consists of about 150 Perl scripts and about 40 Fortran executables.
The system had been working fine until recently, when I changed our file server configuration.
First the system configuration.
Current configuration:
The main servers run Solaris 10 x86 update 8, File servers run CentOS 6.2
Originally all the data files were on local filesystems but the volume of data has grown to where the need for separate file servers were required. As a short term solution until I received the new hardware I had all of the data on a loaner machine that was running Ubuntu 10.04LTS the data directories were exported using NFS, the system ran fine under this configuration.
I migrated everything to the CentOS fileservers. The data is exported using NFS and mounted on the Solaris servers.
Now the problem starts, The Perl scripts use alot of file locking and they all hang when trying to unlock a file. I am not a Perl programmer by any means and I have Googled for this and have found no solutions.
Can anyone help?
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padre::perl
Padre::Perl(3pm) User Contributed Perl Documentation Padre::Perl(3pm)
NAME
Padre::Perl - A more nuanced "Where is Perl" module than Probe::Perl
DESCRIPTION
Even though it has only had a single release, Probe::Perl is the "best practice" method for finding the current Perl interpreter, so that
we can make a system call to a new instance of the same Perl environment.
However, during the development of Padre we have found the feature set of Probe::Perl to be insufficient.
"Padre::Perl" is an experimental attempt to improve on Probe::Perl and support a wider range of situations. The implementation is being
contained to the Padre project until we have competently "solved" all of the problems that we care about.
GUI vs Command Line
On some operating systems, different Perl binaries need to be called based on whether the process will be executing in a graphical
environment versus a command line environment.
On Microsoft Windows perl.exe is the command line Perl binary and wperl.exe is the windowing Perl binary.
On Mac OS X (Darwin) perl.exe is the command line Perl binary and wxPerl.exe is a wxWidgets-specific Perl binary.
PAR Support
PAR executables do not typically support re-invocation, and implementations that do are only a recent invention, and do not support the
normal Perl flags.
Once implemented, we may try to implement support for them here as well.
FUNCTIONS
"perl"
The "perl" function is equivalent to (and passes through to) the "find_perl_interpreter" method of Probe::Perl.
It should be used when you simply need the "current" Perl executable and don't have any special needs. The other functions should only be
used once you understand your needs in more detail.
Returns the location of current perl executable, or "undef" if it cannot be found.
"cperl"
The "cperl" function is a Perl executable location function that specifically tries to find a command line Perl. In some situations you may
critically need a command line Perl so that proper "STDIN", "STDOUT" and "STDERR" handles are available.
Returns a path to a command line Perl, or "undef" if one cannot be found.
"wxperl"
The "wxperl" function is a Perl executable location function that specifically tries to find a windowing Perl for running wxWidgets
applications. In some situations you may critically need a wxWidgets Perl so that a command line box is not show (Windows) or so that Wx
starts up properly at all (Mac OS X).
Returns a path to a Perl suitable for the execution of Wx-based applications, or "undef" if one cannot be found.
COPYRIGHT & LICENSE
Copyright 2008-2012 The Padre development team as listed in Padre.pm.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
The full text of the license can be found in the LICENSE file included with this module.
perl v5.14.2 2012-06-27 Padre::Perl(3pm)