Re: Trying to wrap my head around TAF

  • From: Jeremy Schneider <jeremy.schneider@xxxxxxxxxxxxxx>
  • To: sacrophyte@xxxxxxxxx
  • Date: Mon, 22 Jun 2009 11:52:09 -0500

"Server-side TAF" is a reference to storing the TAF configuration info in
the server, and having the client pull it down at connect-time.  Not well
documented, but very interesting.  Look out for surprising rules of
precedence - the server configuration always over-rides the client
tnsnames.ora!

See also:
http://www.ardentperf.com/2007/03/29/centralized-taf-configuration-in-10g-part-2/

I've configured TAF for automatic failover to a standby (along with
dataguard broker automatic failover) -- but I haven't configured TAF for
both RAC and DG in the same database.  It would be cool to hear if someone
else out there on the list has done this.  :)

-Jeremy


On Fri, Jun 19, 2009 at 3:03 PM, Charles Schultz <sacrophyte@xxxxxxxxx>wrote:

> For #2, I do see table 
> 95-3<http://download.oracle.com/docs/cd/B28359_01/appdev.111/b28419/d_serv.htm#sthref5797>,
> but I missed how it specified "server-side TAF". How does a 
> *server*transparently failover?
>
>
> On Fri, Jun 19, 2009 at 14:56, Charles Schultz <sacrophyte@xxxxxxxxx>wrote:
>
>>
>> 2) Similar to this, I am trying to understand the different TAF parameters
>> used in 
>> dbms_service.create_service<http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14258/d_serv.htm#i1001480>.
>> The documentation has very little to say about them (just the bare bones -
>> the 11g 
>> documentation<http://download.oracle.com/docs/cd/B28359_01/appdev.111/b28419/d_serv.htm#sthref7056>is
>>  exactly the same I think), and when one implicitly creates a service by
>> modifying the SERVICE_NAMES parameter, all the parameters default to null
>> (according to dba_services). Are those TAF parameters actually used, or are
>> they merely place-holders for "future" functionality? If they do play a role
>> in TAF, what and how?
>>
>>


-- 
Jeremy Schneider
Chicago, IL
http://www.ardentperf.com/category/technical

Other related posts: