Aliases can be made directly in LDAP, as it does have an alias type.
I believe Mark's blog explains it, as he has already mentioned.
The Oracle OID (Oracle Internet Directory) documentation also shows how to
do this, as that is where I learned to do it.
My LDAP server is still running and working fine after several years, but
I tend to use EZ Connect for the most part anymore.
Jared
On Tue, May 26, 2020 at 07:09 Luis Claudio Dias dos Santos <
lsantos@xxxxxxxxx> wrote:
Is is possible to define a TNS alias *synonym*? Despite the confuse itJared Still
seems, I will explain.
We have a LDAP server serving most of our TNS names resolutions.
But in a specific case I want a special TNS entry, called MONIT, be
resolved different in different servers. So I can't use LDAP.
The most usual way to do is to create a FULL TNS entry, in each defined
servers, with different MONITs entries. For example:
*server 1:*
*MONIT =*
* (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = someserver01)(PORT
= 1521))*
* (CONNECT_DATA =*
* (SERVER = DEDICATED)*
* (SERVICE_NAME = DB01)*
* )** )*
*server 2:*
*MONIT =*
* (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = someserver02)(PORT
= 1521))*
* (CONNECT_DATA =*
* (SERVER = DEDICATED)*
* (SERVICE_NAME = DB02)*
* )** )*
But this entries, for DB01 and DB02 service names, are well defined on
LDAP server with some other alias:
*$ tnsping DB01*
*Used LDAP adapter to resolve the alias*
*Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST =
someserver01)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED)
(SERVICE_NAME = DB01)))**OK (10 msec) *
*$ tnsping DB02*
*Used LDAP adapter to resolve the alias*
*Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST =
someserver02)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED)
(SERVICE_NAME = DB02)))**OK (10 msec)*
SO, I want locally, on TNSNAMES.ORA, with of course SQLNET.ORA containing
*NAMES.DIRECTORY_PATH=
(TNSNAMES,LDAP)*, the following in local TNSNAMES.ORA:
*server 1:*
*MONIT = DB01*
*server 2:*
*MONIT = DB02*
But this does not work...
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