|
|
tinyTiM 2.0.0 alpha4 (Map I/O branch)
12-07-2008
|
|
TM::ResourceAble::MLDBM(3pm) User Contributed Perl Documentation TM::ResourceAble::MLDBM(3pm) NAME
TM::ResourceAble::MLDBM - Topic Maps, DBM Storage (synchronous) SYNOPSIS
use TM::ResourceAble::MLDBM; { my $tm = new TM::ResourceAble::MLDBM (file => '/tmp/map.dbm'); # modify the map here..... } # it goes out of scope here, and all changes are written back automagically # later in the game { my $tm = new TM::ResourceAble::MLDBM (file => '/tmp/map.dbm'); # we are back in business, no sync necessary } DESCRIPTION
This package just implements TM with a BerkeleyDB store. Unlike TM::Materialized::MLDBM this module does not need explicit synchronisation with the external resource (the DBM file here). It ties content-wise with the DBM file at constructor time and unties at DESTROY time. This implementation technique is not so memory-efficient as I had thought. Whenever an assertion or a toplet is referenced, the whole block of toplets, resp. assertions, is loaded from the DB database. For small maps this is really fast, but it can become a drag for larger maps. See TM::ResourceAble::BDB for a more efficient solution. NOTE: Be careful to use this together with TM::Index::*. The indices will be held as part of the map, and so will be stored along side. If you heavily use the map, this can result in many swapin/swapouts. Better to look at TM::IndexAble for that matter. INTERFACE
Constructor The constructor expects a hash with the following keys: file (no default) This contains the file name of the DBM file to tie to. SEE ALSO
TM, TM::Materialized::MLDBM AUTHOR INFORMATION
Copyright 200[68], Robert Barta <drrho@cpan.org>, All rights reserved. This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. http://www.perl.com/perl/misc/Artistic.html perl v5.10.1 2010-07-18 TM::ResourceAble::MLDBM(3pm)