postgresql

History

Bruce Momjian b1a5f87209 Tom Lane wrote: > There's no longer a separate call to heap_storage_create in that routine > --- the right place to make the test is now in the storage_create > boolean parameter being passed to heap_create. A simple change, but > it passeth patch's understanding ... Thanks. Attached is a patch against cvs tip as of 8:30 PM PST or so. Turned out that even after fixing the failed hunks, there was a new spot in bufmgr.c which needed to be fixed (related to temp relations; RelationUpdateNumberOfBlocks). But thankfully the regression test code caught it :-) Joe Conway		2002-08-15 16:36:08 +00:00
..
Makefile	Fix relative path references so that make knowns which dependencies refer	2000-08-31 16:12:35 +00:00
README	Postgres95 1.01 Distribution - Virgin Sources	1996-07-09 06:22:35 +00:00
md.c	Restructure local-buffer handling per recent pghackers discussion.	2002-08-06 02:36:35 +00:00
mm.c	Restructure local-buffer handling per recent pghackers discussion.	2002-08-06 02:36:35 +00:00
smgr.c	Tom Lane wrote:	2002-08-15 16:36:08 +00:00
smgrtype.c	Update copyright to 2002.	2002-06-20 20:29:54 +00:00

README

# $Header: /cvsroot/pgsql/src/backend/storage/smgr/README,v 1.1.1.1 1996/07/09 06:21:59 scrappy Exp $

This directory contains the code that supports the Postgres storage manager
switch and all of the installed storage managers. In released systems,
the only supported storage manager is the magnetic disk manager. At UC
Berkeley, the Sony WORM optical disk jukebox and persistent main memory are
also supported.

As of Postgres Release 3.0, every relation in the system is tagged with the
storage manager on which it resides. The storage manager switch code turns
what used to by filesystem operations into operations on the correct store,
for any given relation.

The files in this directory, and their contents, are

smgrtype.c Storage manager type -- maps string names to storage manager
IDs and provides simple comparison operators. This is the
regproc support for type 'smgr' in the system catalogs.

smgr.c The storage manager switch dispatch code. The routines in
this file call the appropriate storage manager to do hardware
accesses requested by the backend.

md.c The magnetic disk storage manager.

mm.c The persistent main memory storage manager (#undef'ed in
tmp/c.h for all distributed systems).

sj.c The sony jukebox storage manager and cache management code
(#undef'ed in tmp/c.h for all distributed systems). The
routines in this file allocate extents, maintain block
maps, and guarantee the persistence and coherency of a cache
of jukebox blocks on magnetic disk.

pgjb.c The postgres jukebox interface routines. The routines here
handle exclusion on the physical device and translate requests
from the storage manager code (sj.c) into jbaccess calls.

jbaccess.c Access code for the physical Sony jukebox device. This code
was swiped from Andy McFadden's jblib.a code at UC Berkeley.