Index: README.dbmirror
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RCS file: /projects/cvsroot/pgsql-server/contrib/dbmirror/README.dbmirror,v
retrieving revision 1.6
diff -c -r1.6 README.dbmirror
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! DBMirror - Postgres Database Mirroring
  ===================================================
  
  
! DBMirror is a database mirroring system developed for the Postgres
  database Written and maintained by Steven Singer(ssinger@navtechinc.com)
  
  
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! DBMirror - PostgreSQL Database Mirroring
  ===================================================
  
  
! DBMirror is a database mirroring system developed for the PostgreSQL
  database Written and maintained by Steven Singer(ssinger@navtechinc.com)
  
  
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--- 54,66 ----
  in the MirrorHost table) then all records of it are purged from the
  Pending tables.
  
+ Requirments:
+ ---------------------------------
+ -PostgreSQL-7.4 (Older versions are no longer supported)
+ -Perl 5.6(Other versions might work)
+ -PgPerl (http://gborg.postgresql.org/project/pgperl/projdisplay.php)
+ 
+ 
  Installation Instructions
  ------------------------------------------------------------------------
  
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  To build the trigger run  make on the "Makefile" in the DBMirror directory.
  
! Postgres-7.3 & 7.4  Make Instructions:
  
    If you have already run "configure" in the pgsql-server directory 
    then run "make" in the dbmirror directory to compile the trigger.
  
- Postgres-7.1 & Postgres-7.2 Make Instructions:
- 
-   The included Makefile is not compatible with postgres 7.1 and 7.2
-   The trigger will need to be built by hand.
- 
-   Run the following commands
- 
-   gcc -fpic -I/usr/local/pgsql/include/server -c pending.c -DNOSCHEMAS -DNODROPCOLUMN
-   ld -shared -o pending.so pending.o
- 
-   Assuming the postgres include files are in /usr/local/pgsql/include/server.  
- 
- Postgres-7.1.x installations should change this to
- /usr/local/pgsql/include  (The server part is for 7.2+)
- 
- If you have installed the postgres include files to another location then
-   modify the include path to reflect this.
- 
-   Compiling the trigger by hand requires that all postgres headers be installed
-   ,this is accomplished in postgresql(7.1 or 7.2) by running 
-   "make install-all-headers" in the postgres source directory.
- 
  
  You should now have a file named pending.so that contains the trigger.
  
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  To build the trigger run  make on the "Makefile" in the DBMirror directory.
  
! PostgreSQL-7.4  Make Instructions:
  
    If you have already run "configure" in the pgsql-server directory 
    then run "make" in the dbmirror directory to compile the trigger.
  
  
  You should now have a file named pending.so that contains the trigger.
  
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  This file contains SQL commands to setup the Mirroring environment.  
  This includes
  
! -Telling Postgres about the "recordchange" trigger function.
  -Creating the Pending,PendingData, MirrorHost, MirroredTransaction tables
  
  
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  This file contains SQL commands to setup the Mirroring environment.  
  This includes
  
! -Telling PostgreSQL about the "recordchange" trigger function.
  -Creating the Pending,PendingData, MirrorHost, MirroredTransaction tables
  
  
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  where MyDatabaseName is the name of the database you wish to install mirroring
  on(Your master).
  
- Postgres-7.1 and 7.2 Notes:
-   -The syntax for creating a trigger function changed in Postgres-7.3. 
-   Change the line in MirrorSetup.sql from 
- 
-   CREATE FUNCTION "recordchange" () RETURNS trigger AS
- 
-   to 
-   CREATE FUNCTION "recordchange" () RETURNS OPAQUE AS
- 
  
  3) Create slaveDatabase.conf files.
  
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  DBMirror.pl is the perl script that handles the mirroring.  
  
! It requires the Perl library Pg(See src/interfaces/perl5 in the postgres 
! source distribution).
  
  It takes its configuration file as an argument(The one from step 3)
  One instance of DBMirror.pl runs for each slave machine that is receiving
--- 161,167 ----
  
  DBMirror.pl is the perl script that handles the mirroring.  
  
! It requires the Perl library Pg(See http://gborg.postgresql.org/project/pgperl/projdisplay.php)
  
  It takes its configuration file as an argument(The one from step 3)
  One instance of DBMirror.pl runs for each slave machine that is receiving
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  -Support for conflict resolution.
  -Batching SQL commands in DBMirror for better performance over WAN's.
  -Better support for dealing with Schema changes.
- 
- Tested Platforms:
- ------------------
- 
- DBMirror has been tested on the following configurations but should
- work on any platform with Postgres >= 7.1 and Perl 5.6. 
- 
- RedHat Linux 7.1 & 6.2
-  -Postgres 7.1.2
-  -Perl 5.6
- 
- Mandrake Linux 8.0(Limited Testing)
-  -Postgres 7.2
-  -Postgres 7.3
-  -Postgres 7.4
-  -Perl 5.6
  
  
  Steven Singer
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