praveen.k@xxxxxxxxxxxxxxxxxx ("Praveen Kumar (TUV)") writes: > I have install postgresql on Redhat AS 4.Now we want to migrate data > from oracle 8i to postgresql 8.1 and want to create snapshots , > materialized view,dblink,taking online backup,logical backup and > establish replication between three production server.Plz tell me > which documents,links and books I should follow for getting > knowledge For many of these things, you are using what appears to be terminology *very* specific to Oracle. PostgreSQL isn't Oracle, so things are not implemented the same, and certainly don't follow Oracle's use of terminology. For instance, I can think of several possible meanings for "snapshots." And it seems obvious that no one would be such an idiot as to ask for an "illogical backup." There is a section in the documentation on backups; you should avail yourself of that, immediately, as it explains various sorts of backup "machinery" that is available. As for replication, if you need single master to multiple slave asynchronous replication, see <http://slony.info/>. The 1.1.5 release of Slony-I, which supports PostgreSQL 8.1, should be available in the coming week. You will find it more useful to describe what you *want*. -- let name="cbbrowne" and tld="cbbrowne.com" in String.concat "@" [name;tld];; http://cbbrowne.com/info/slony.html Signs of a Klingon Programmer - 3. "This machine is GAGH! I need dual Pentium processors if I am to do battle with this code!"