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Genezzo::Tablespace(3)User Contributed Perl DocumentatioGenezzo::Tablespace(3)

NAME
       Genezzo::Tablespace - a class that defines a tablespace,	the
       relationship between a collection of files on disk and a	set of tables
       in the dictionary.

SYNOPSIS
DESCRIPTION
ARGUMENTS
CONCEPTS
       A Tablespace is a storage unit for a table or many tables, and a	table
       only exists in a	single tablespace.  Each tablespace is composed	of one
       or more datafiles, and each datafile is only associated with a single
       tablespace.

       The tablespace object (tso) is used to co-ordinate several major
       file/storage subsystems.	 For example, each datafile has	local state
       information (free space,	used extents) controlled by space management
       (SpaceMan::SMFile), but the overall information about a table and its
       datafiles is stored in the dictionary tables.  Finally, the buffer
       cache is	used to	mediate	access to the actual disk files, dealing with
       issues like locking, concurrency, and caching.  When a table is
       updated,	it uses	the buffer cache to write to a datafile.  If the
       current datafile	is full, the table will	use the	tso to find the	next
       available file, and the tso will	update the dictionary to note that the
       file is in use.	The tso	also propogates	storage	management preferences
       stored in the dictionary	to the file space management, controlling
       extent size growth.

FUNCTIONS
LIMITATIONS
TODO
       filearr,	used, unused: should match dict	_tsfiles fileidx - done	3.21?
       notion of buffercache associated	the tablespace object -- possible
       multiple	active bc's, with different characteristics/semantics, e.g. a
       bc for temp space with different	blocksize, lacking txn recovery?  Need
       to guarantee that all clients of	a tso use the same bc for
       consistency/locking/txn support
       use compatibility matrix	to drive automatic upgrade capability

AUTHOR
       Jeffrey I. Cohen, jcohen@genezzo.com

SEE ALSO
       Genezzo::PushHash::PushHash, Genezzo::Dict, perl(1).

       Copyright (c) 2003-2006 Jeffrey I Cohen.	 All rights reserved.

	   This	program	is free	software; you can redistribute it and/or modify
	   it under the	terms of the GNU General Public	License	as published by
	   the Free Software Foundation; either	version	2 of the License, or
	   any later version.

	   This	program	is distributed in the hope that	it will	be useful,
	   but WITHOUT ANY WARRANTY; without even the implied warranty of
	   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
	   GNU General Public License for more details.

	   You should have received a copy of the GNU General Public License
	   along with this program; if not, write to the Free Software
	   Foundation, Inc., 51	Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

       Address bug reports and comments	to: jcohen@genezzo.com

       For more	information, please visit the Genezzo homepage at
       <http://www.genezzo.com>

perl v5.24.1			  2007-06-26		Genezzo::Tablespace(3)

NAME | SYNOPSIS | DESCRIPTION | ARGUMENTS | CONCEPTS | FUNCTIONS | LIMITATIONS | TODO | AUTHOR | SEE ALSO

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