How can I write the programm

I want to create replication programm in synchronic time.
But I never made something like this, and I have no idee from where should I start. What I need to perform it.
If somebody can help or even give some advices I will be thankful.
BR
Marceli

I want to create replication programm in synchronic
time.
But I never made something like this, and I have no
idee from where should I start. What I need to
perform it. Well, your database will probably include some form of replication feature. What DB are you using and what does its documentation say about replication?
If it doesn't have natice support for replication, are there third-party tools available that you can use?
If not, what ways are there to get data out of the database? Does it support export and import through flat files? Just SQL? Find out what your options are.
But if you get to that level, the level of writing your own replication system, you're going to have to do a lot of reading on the theory behind replication. We've just completed a replication project here based on DB2's replication features. It was non-trivial to build on what was already provided. I don't fancy the idea of managing everything from the ground up.
But perhaps the most important question is one of scope. If you're talking about very limited replication, that's one thing. If you're talking about full-scale transmission of changes back and forth, that's quite another.

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