Question : Asynchronous vs Synchronous replication

I am going to create database replication using Oracle 8i advanced replication.  would anyone tell me what method will best give me real-time replication asynchronous or synchronoug method?

thanks.
gsm

Answer : Asynchronous vs Synchronous replication

****From Oracle 8 documentation*****

Using Synchronous Data Propagation

Asynchronous data propagation is the normal configuration for advanced replication environments.
However, Oracle also supports synchronous data propagation for applications with special
requirements. Synchronous data propagation occurs when an application updates a local replica of a
table, and within the same transaction also updates all other replicas of the same table. Consequently,
synchronous data replication is also called real-time data replication. Use synchronous replication
only when applications require that replicated sites remain continuously synchronized.

Note: A replication system that uses real-time propagation of replication data is highly dependent on
system and network availability because it can function only when all sites in the system are
concurrently available.