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Home -> Community -> Mailing Lists -> Oracle-L -> Re: Logical Standby Switchover on Solaris
Thanks Carel and yes I am not relying on LS for Failover purpose as I
already have PSB in production but in order to balance the Report Load , I
am planning to put the LSB in production. It is working very good in QA so
far but I thought to check the switchover so that it can be used in some
extreme case and it is failing. I am also planning to do the same test
with 10G and so rebuilding the new server. So from your email, it is clear
that you have not done the switchover Test and so waiting if somebody else
has done the switchover with LSB successfully.
Thanks
Indy Johal
Manager, Database Administration
PR Newswire
indy_johal_at_prnewswire.com
http://www.prnewswire.com
(201) 946-5687 [W]
(201) 220 6781 [M]
"We tell your story to the world."
Carel-Jan Engel <cjpengel.dbalert_at_xs4all.nl>
Sent by: oracle-l-bounce_at_freelists.org
03/01/2004 09:48 AM
Please respond to oracle-l
To: oracle-l_at_freelists.org
cc:
Subject: Re: Logical Standby Switchover on Solaris
Hi Indy,
I've configured appr. 30 DG installations, 8(.1.7/9.01/9.2.0.2 and up), and only one of them was LSB. This one was intended for serving the www-access, and witth the LSB solution the internet-users couldn't hurt performance on the Primary (publishing) system. HA was asserted using a PSB server as well. LSB appeared not be as stable as we wished. (This is 9.2.0.2)
Apart from whatever OS you are on, I would not advise you to rely on LSB for failover purposes. For reporting, in some cases, yes, it can be useful. For High Availability you should rely on PSB. If you need both HA and LSB, consider configuring both LSB and PSB. All the documented stuff in Chapter 8 of the DG Concepts & Administration Guide should make you doubt whether you would rely on this for HA. At least I did, and decided not to go for it and advise my customers accordingly. There are simply too much failures possible in the Log Apply services related to unallowed DML etc. As long as you are not responsible for the DML executed (which DBA is?), applications can seriously damage the setup you tediously created. PSB is pretty straightforward, once you master the concepts, and has pretty much matureness right now. LSB is still immature (at least in 9i, I'm setting up a test in 10g).
Regards, Carel-Jan
At 02:10 PM 3/1/2004, you wrote:
Hi,
Is there anybody configured Logical Standby on Sun solaris and if yes, can you please update the ORacle/OS version including any additional Patches. The important point I need to know if they have done the successful switchover. I had tried this and it failed and still working with Oracle support but so far with no result. If somebody has done the Switchover test on other paltform, then please share the Platform. I am doing some test with ORacle 10G today so as see if it works there. Actually I had one of the Reporting site created with Logical standby for QA and it failed to switchover and so been struck with rollover to PRoduction.
Thanks
Indy Johal
Manager, Database Administration
PR Newswire
indy_johal_at_prnewswire.com
http://www.prnewswire.com
(201) 946-5687 [W]
(201) 220 6781 [M]
"We tell your story to the world."
===
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The Netherlands
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-- Archives are at http://www.freelists.org/archives/oracle-l/ FAQ is at http://www.freelists.org/help/fom-serve/cache/1.html -----------------------------------------------------------------Received on Mon Mar 01 2004 - 08:59:14 CST
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