Hello, I am Java Solutions Developer. I have my servers that run PostgreSQL v8.1.11 and they are quit stable. Recently i was supposed to install a Database Replication tool for the Databases. I realized that i might have to upgrade my database from v8.1 .11 to v8.4 *1) Would there be any compatibillity issue if i do this migration at one shot?*
*2)* I have my Java Code that is very vast and it has at many places the PostgreSQL queries well compatible with the current running version( i.e v8.1.11), *would the Migration need some changes to be done in the queries?* *3)* Are there any compatibility mismatch from the version 8.1.11 to the version 8.4 or 8.3 *4) *Following are the details of the platform on which i have my project running: *Operating System:* CentOS v5.1 *Java Version:* v1.4 for the Java Code. *Web Server:* tomcat4 * PostgreSQL Version: *PostgreSQL v8.1.11 *5) *I want to implement a Master-Slave Replication system, and found that SLONY-I is the best that matches with PostgreSQL database system. But this is advisable in an environment where none of the master/slave(s) are having a problem of being detached from the network or frequent power failures. Here with my project this is the case. *Can you suggest a good database replication tool that would replicate my postgreSQL databases it cud be a master-master DB replication tool as well. Not a problem. *I have tried *RubyRep, Bucardo, **but none of these have a stable rpm release for CentOS version of Linux Operation System*. Need Help Urgently. Thanks in advance. Regards, Krishna Komarpant Java Solutions Developer Online Productivity Solutions Pvt. Ltd. Verna - Goa India* *