Re: Oracle Streams - worth it?
Date: Wed, 06 Feb 2008 08:53:16 -0800
Isaac Blank wrote:
> We are evaluating different ways for a one-way replication from one
> database to another. Additional requirement is, pat of replicated data
> (detail rows only) should be updateable. Currently, we use materialized
> views with refresh jobs running every minute. An insert trigger on the
> master table's snapshot creates a queue entry for each replicated row.
> Later, an asyncronous job goes through the queue and pulls detail rows
> via database link. This has worked fine so far, but we started thinking
> of creating multiple replicas (each of them would only recieve a portion
> of the overall data), and we're afraid that materilized view maintenance
> overhead in the master database will become too taxing.
> One of the possibilities we're looking at is Oracle Streams, but I
> have heard some allegations that it is inherently slow because it uses
> AQ as transport mechanism.
> So my question is, is it worth considering Oracle Streams for really
> high load, almost mission-critical application? The lag time should not
> exceed few minutes to fulfill some of our Service Level Agreements.
> Also, what other alternatives should ve consider - be it Oracle or
> third party products? I know we bought a Shareplex license a while ago
> (not sure if it's still valid, but we might renew it if it's worth it)
> Thanks in advance,
> Isaac Blank
AQ is vastly superior, in every sense, to what you are currently using.
But I am fascinated by anyone claiming AQ is slow. Who and where?
-- Daniel A. Morgan Oracle Ace Director & Instructor University of Washington damorgan_at_x.washington.edu (replace x with u to respond) Puget Sound Oracle Users Group www.psoug.orgReceived on Wed Feb 06 2008 - 10:53:16 CST