Re: Best way to updat TNSNames.ora in all servers

On Sep 25, 1:19 am, Krish <Krishna.Bu...@xxxxxxxxx> wrote:
On Sep 24, 9:20 am, "fitzjarr...@xxxxxxx" <fitzjarr...@xxxxxxx> wrote:



Comments embedded.
On Sep 23, 6:30 pm, Krish <Krishna.Bu...@xxxxxxxxx> wrote:

Hi All,
We have many unix (hp-ux, AIX, Linux, Solaris) servers running Oracle
database 9.2.0 enterprise edition.

Are all of these servers running the same release of Oracle, with the
same options installed? If so then I will agree with the advice thus
posted: consolidate these databases into a single instance/multiple
schemas on a server sized to provide sufficient 'horsepower' to allow
all of these applications to function properly. The only reason I
could justify for having many installations of Oracle 9.2.0.x would be
if the installed options differ between servers, for example the hp-ux
servers utilize partitioning, the Solaris servers implement Label
Security, the AIX servers house your data warehouses, etc. Should
that be the case then I would still work to consolidate the databases
on a server or operating system to a single Oracle database on a
single server suitably configured for the user load. Why so many
vendors of Unix? Was this the product of a merger? Even if an
application has need of a specific operating system vendor (for
example, AIX) the database it accesses should be able to be run on
UNIX from a different vendor (Solaris), allowing you to reduce the
number of physical systems running Oracle to one or possibly two,
depending upon the size of these databases, the user load and your
budget and providing a uniform running environment for your database
or databases.

Are these installations still sitting at 9.2.0.1? Again I must agree
with advice already dispensed and patch the installations to the
terminal release of 9.2.0 (9.2.0.8) and apply all of the CPU updates.

Each server has 4 or more
databases. Currently each unix server has its own tnsnames.ora in /etc
folder and all windows machines TNS_ADMIN is pointing to a shared
drive.

we are planning to implement one of the below methods to avoid
"ORA-12154" error whenever new db is created and forgot to update all
the tnsnames.ora files.
1.creating TNSNames.ora in a shared (NFS mounteed) file system and
pointing all servers TNS_ADMIN to this shared drive.

You'll be dependent upon that NFS mount to exist and if it fails so
goes your access.

2.shell sciprt to replace all the tnsnames.ora files with the master
tnsnames.ora( master tnsnames.ora file will be updated whenever new db
is created)

Working in a leveraged environment running several versions of Oracle
(since not all applications play nicely with the later versions of
Oracle and some applications require options which are absent for
others) we use such a solution. Ensure that the transfer of the
'master' tnsnames.ora file is successful to all destinations in your
script and report any errors in transfer and allow for re-transmission
of the 'master' to failed destinations.

I would like to know the experts comments, suggestions.

Thanks in advance for all your help.

Krish.

David Fitzjarrell

Hi all,

Thank you very much for all of your suggestions.
We are following the "single database -multiple schemas" concept for
our testing environments.
But we do have some production like environments where we have to
maintain different DBs on different OS.

we are working on "Oracle Internet Directory" option. I belive this is
the right solution if we don't have to change anything in the
application.

Once again thanks .

Krish

You don't (have to change anything in the application, that is).

The app still connects as ever it did.

It's the sqlnet.ora which says 'this time, I use an LDAP server' and
an ldap.ora says 'Over there, and by the way it's OID'. That's a
client configuration change, not an application change.

.

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