Re: Oracle 10 Failover
Date: Thu, 11 Sep 2008 12:06:06 +0200
On Thu, 11 Sep 2008 11:39:04 +0200, "Chris Seidel" <cseidel_at_arcor.de> wrote:
>joel garry wrote:
>> Could you be more specific as to the replication you referred to in
>> the original post? I suspect you may have meant a non-Oracle thing?
>Location 1: Primary database
>Location 2: Standby database
>Both location connected via WAN (1 Mbit/s), bandwith not exclusively for the
>100 % oracle 10.
Bandwith might be insufficient for a standby database, depending on
There is a series of whitepapers on OTN discussing MAA architecture. One of these papers deals with network issues, and has a formula to calculate required bandwith.
For 200 Mb per 15 minutes 2.5 Mb is required. The problem is, I was having only two, and I had this setup
L1 L2 P1 ---------------------------> S1 S2 <------------------------- P2
So I needed 2 times 2.5 Mb
I conducted a test once, and boy I had fun. What I did was
- copied all_objects to a standard table - ran enough updates to force a log switch - multiplied the updates by a factor 3 - created a stored procedure with this code - ran this procedure using dbms_job at both sites simultaneously.
My performance went completely to the dogs, as both sites were waiting on each other. It didn't crash or stop though, only the end-user (me) experienced the database as being in coma.
-- Sybrand Bakker Senior Oracle DBAReceived on Thu Sep 11 2008 - 05:06:06 CDT