Free availability data software for linux

The Linux Replicated High Availability Manager (aka Linuxha.net) allows the creation of clusters for application high availability through data replication.
Currently, clusters are limited to two nodes, but multiple applications can be hosted and failed-over between the nodes. The software uses DRBD to provide the data replication facillity.
Although this shared-nothing type architecture is typically more complex to configure and manage the Linuxha.net toolset attempts to manage much of this complexity for the administrator.
Much of the initial development and testing took place on various Linux 2.4 based distributions. More recently development and testing has taken place on Linux 2.6 distributions (primarily Fedora Core), ensuring the product works as expected on the latest available distribution releases.
Much effort has been spent ensuring that significant levels of support documentation is available. The documentation section now contains several guides as well as a user manual.
Please note that the user manual will eventually be replaced by a reference guide and various installation and user guides. Keep changing the documentation page regularly - these will be added when they are completed and aim to just cover specific topics.
Enhancements:
- Improvements were made to handling physical network link checking.
- Improvements were made for local IP fail-over.
- More flexible cluster partitioning handling was implemented.

File::Data is a Perl module as a interface to file data.

Wraps all the accessing of a file into a convenient set of calls for reading and writing data, including a simple regex interface.

Note that the file needs to exist prior to using this module!

See new()

SYNOPSIS

use strict;

use File::Data;

my $o_dat = File::Data->new(./t/example);

$o_dat->write("complete file contentsn");

$o_dat->prepend("first linen"); # line 0

$o_dat->append("original second (last) linen");

$o_dat->insert(2, "new second linen"); # inc. zero!

$o_dat->replace(line, LINE);

print $o_dat->READ;

Or, perhaps more seriously :-}

my $o_sgm = File::Data->new(./sgmlfile);

print "new SGML data: ".$o_sgm->REPLACE(
s*((?s).*)s* ,
qq| key="val" |,
) if $o_sgm;

See METHODS and EXAMPLES.

IMPORTANT

lowercase method calls return the object itself, so you can chain calls.

my $o_obj = $o_dat->read; # ! READ; # !<<less