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DB_File::SV18x
Co-existence of berkeley db 1.85, 1.86 and 2+

DB_File::SV18x - Co-existence of berkeley db 1.85, 1.86 and 2+


NAME

DB_File::SV18x - Co-existence of berkeley db 1.85, 1.86 and 2+


SYNOPSIS

Identical to DB_File


DESCRIPTION

The DB_File::SV18x modules override the namespace used by the berkeley db library with a namespace that allows the most prominent versions of the library, namely 1.85 and 1.86, coexist with the current 2 or higher in memory. Thus it offers both convenient transformations of database files between different versions and allows a smooth upgrade path from 1.8x to 2.0.

For usage information please consult the documentation for DB_File and globally replace the token DB_File by DB_File::SV185 or DB_File::SV186 whatever is avilable on your system.


EXAMPLE


  use DB_File ();

  use DB_File::SV185 ();

  use Fcntl;

  $F = "str.db";

  tie(%h, 'DB_File', "$F.200",

      O_RDWR|O_CREAT, 0644, $DB_File::DB_HASH) or die; 

  tie(%i, 'DB_File::SV185', $F,

      O_RDONLY, 0644, $DB_File::SV185::DB_HASH) or die; 

  %h = %i;

This example does a conversion of a database file from 1.85 to whatever is the current default in the DB_File module of the machine that runs this code.

Note that berkeley db 2.0 comes with excellent conversion tools and for mere conversion DB_File::SV18x is not necessary. Its usefulness lies in the open coexistence.


AUTHOR

Andreas Koenig koenig@kulturbox.de

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