RE: asking your opinion

CAVEAT: With all the banging around Oracle has done with replication, I think my knowledge of replication is quickly getting outdated. Keeping that in mind: In my limited experience with simple snapshot replication, about the only time you run into difficulties is when you need to replicate at frequent intervals -- like every 15 seconds or something like that. Then the overhead gets nasty. For something like every five minutes or greater, simple snapshots are easy to setup and maintain, and the overhead ain't bad then. I've found it to be reliable as long as you don't screw with it after you set it up.

By "simple snapshot replication" I mean the old style of replication where you create snapshot logs on the master; snapshots on the client(s); a refresh group in a refresh boss guy schema on the client(s); add the snapshots to the refresh group; then set up a job in the refresh boss's schema that refreshes the refresh group. Then you periodically monitor the refresh job to make sure that it isn't broken.

I think the New! Improved! replication stuff has you putting the refresh times directly in the create snapshot (E-X-C-U-S-E M-E ... "Materialized View") statement. I don't do that; at least not until they incorporate the word "Existential" into the process.

> -----Original Message-----
>
>
> Thanks Robert, Malden and stephen. I am just wondering does master
> replication is an option too? As I mentioned earlier, the application
> is sun one portal, content based.
>

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Author: Stephen Lee
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