DNS vs. Oracle Name Service vs. tnsnames.ora

Can anyone shed some light on this?
I heard that Oracle is going toward a DNS solution and going away from
tnsnames.ora and the Oracle Naming Service. Is this true?
We are looking to place a naming solution in our environment and I want to
know which direction to head in. Also, if possible, I would like users to
only see the databases they need to see, which is the main problem we have
right now using a global tnsnames.ora file. Limiting users' views to only
what they have a business need to see is an important step in many steps to
secure the environment. I don't see how this would be accomplished using
DNS.
Comments?
Thanks,
Paul
null

Because of your sqlnet.ora (In the same directoty than the the tnsnames.ora).
In this parameter file, you find the "NAMES.DEFAULT_DOMAIN" (Default value = world) wich is used by Oracle to complete your input.
The default value "World" is also in the sample init/pfile as the default domain.

Similar Messages

LDAP versus TNSNAMES.ORA

Have a client with lots of Oracle all over the place. They have indicated they are looking at an "enterprise TNSNAMES.ORA" file. Not given an specifics on how they think it can be done/why they want it done.
Can Oracle use an LDAP directory to perform the name->IP mapping function of TNSNAMES? Is an enterprise TNSNAMES.ORA feasible?
I prefer email if you can. Thank you in advance for any insights/help in this regard.

Yes, Oracle can use LDAP (see "Net8 Administrator's Guide").
One could also use Oracle Names as "enterprise TNSNAMES.ORA", which I would rate higher, as it is native Oracle naming method. Also you can configure it with Net8 Assistant, i.e. not going into too much details about Net8 internals.
null

Oracle environment variable tns_admin instead tnsnames.ora

Hi, I have a big trouble with the tns_name file. First of all I am working oracle with visual studio .net. I have the file tns_name in the following route C:\oracle\ora92\network\ADMIN\tnsnames.ora. If I delete this file, visual studio .net can still work properly. Then I figured out that it is taking the tnsnames from tns_admin in environment variables. It means visual studio .net is taking the tnsnames from tns_admin instead of C:\oracle\ora92\network\ADMIN\tnsnames.ora.
Can someone explain me why and how is the way to configure which file is used? Where can I configure it?
Thanks in advance.

it throws the following error: ora-12154 tns could not resolveORA-12154 ALWAYS only occurs on SQL Client & no SQL*Net packets ever leave client system
ORA-12154 occurs when client requests a connection to some DB server system using some connection string.
The lookup operation fails because the name provided can NOT be resolved to any remote DB.
The analogous operation would be when you wanted to call somebody, but could not find their name in any phonebook.
The most frequent cause for the ORA-12154 error is when the connection alias can not be found in tnsnames.ora.
The lookup operation of the alias can be impacted by the contents of the sqlnet.ora file; specifically DOMAIN entry.

ORA-28500: connection from ORACLE to a non-Oracle system returned this message: ORA-02063: preceding line from OWB_75

ORA-28500: connection from ORACLE to a non-Oracle system returned this message: ORA-02063: preceding line from OWB_75
Scenario:
I am having difficulty getting ODBC connection between Oracle OWB app with an 11gR2 DB (running on a VirtualBox Linux) and SQL Server 2008 running directly on the host. (Windows 8)
I am trying to take a SQL Server 2008 feed into Oracle Ware house Builder, and think(!) I have read everything and configured it in accordance (but I presume not given 3 days of failed attempts to fix it). I have also read several blogs, hence there might be a few more settings in the configuration files than the formal documentation says, but these have come from blogs that have “Solved” problems for other similar situations.
The environments:
HOST:
Name: RESOLVEIT-PC
IP: 192.168.1.80
Windows 8 (64bit) , with system DSN ODBC connection ACME_POS created with 32 bit ODBC set up (This setting still shows up fine in the 64 bit ODBC).
GUEST VM:
Name: OraDBSvr.com
GUES fixed IP Address: 192.1.200
Oracle VirtualBox (4.2.16)
Oracle Redhat Linux 6 (x86)
Oracle 11gR2 Enterprise Edition (11.2.0.1.0)
ODBC: Freetds driver
Configuration files:
initacmepos.ora
HS_FDS_CONNECT_INFO = 192.168.1.80/SQLEXPRESS/ACME_POS
HS_FDS_TRACE_LEVEL = 0
HS_FDS_SUPPORT_STATISTICS=FALSE
HS_RPC_FETCH_REBLOCKING= OFF
HS_FDS_FETCH_ROWS = 1
HS_FDS_SHAREABLE_NAME = /usr/local/lib/libtdsodbc.so
set ODBCINI=/opt/odbc/odbc.ini
# set <envvar>=<value>
odbc.ini
[ACME_POS]
Driver     = FreeTDS
Description = ODBC Connection via FreeTDS
Trace       = 1
Servername = 192.168.1.80
Database    = dbo
odbcinst.ini
[PostgreSQL]
Description                        = ODBC for PostgreSQL
Driver                   = /usr/lib/psqlodbc.so
Setup                    = /usr/lib/libodbcpsqlS.so
Driver64                              = /usr/lib64/psqlodbc.so
Setup64                              = /usr/lib64/libodbcpsqlS.so
FileUsage                           = 1
[MySQL]
Description                        = ODBC for MySQL
Driver                   = /usr/lib/libmyodbc5.so
Setup                    = /usr/lib/libodbcmyS.so
Driver64                              = /usr/lib64/libmyodbc5.so
Setup64                              = /usr/lib64/libodbcmyS.so
FileUsage                           = 1
[FreeTDS]
Discription             = TDS driver (Sybase / MS SQL)
Driver                           = /usr/local/lib/libtdsodbc.so
# Setup                         = /usr/local/lib/libtdsS.so
FileUsage                           = 1
CPTimeout               =
CPReuse                 =
[oracle@oraDBsvr etc]$
freetds.conf
#   $Id: freetds.conf,v 1.12 2007-12-25 06:02:36 jklowden Exp $
# This file is installed by FreeTDS if no file by the same
# name is found in the installation directory.
# For information about the layout of this file and its settings,
# see the freetds.conf manpage "man freetds.conf".
# Global settings are overridden by those in a database
# server specific section
[global]
        # TDS protocol version
;              tds version = 4.2
               # Whether to write a TDSDUMP file for diagnostic purposes
               # (setting this to /tmp is insecure on a multi-user system)
;              dump file = /tmp/freetds.log
;              debug flags = 0xffff
               # Command and connection timeouts
;              timeout = 10
;              connect timeout = 10
               # If you get out-of-memory errors, it may mean that your client
               # is trying to allocate a huge buffer for a TEXT field.
               # Try setting 'text size' to a more reasonable limit
               text size = 64512
# A typical Sybase server
[egServer50]
               host = symachine.domain.com
               port = 5000
               tds version = 5.0
# A typical Microsoft server
[ACME_POS]
host = 192.168.1.80
port = 60801                                # also tried 1433
instance = SQLEXPRESS
tds version = 8.0
client charset = UTF-8
tsql -LH 192.168.1.80
     ServerName RESOLVEIT-PC
   InstanceName SQLEXPRESS
    IsClustered No
        Version 10.50.4000.0
            tcp 60801
             np \\RESOLVEIT-PC\pipe\MSSQL$SQLEXPRESS\sql\query
            via RESOLVEIT-PC,0:1433
Oracle listener:
[oracle@oraDBsvr log]$ cat /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora
# listener.ora Network Configuration File: /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora
# Generated by Oracle configuration tools.
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = acmepos)
(ORACLE_HOME = /u01/app/oracle/product/11.2.0/dbhome_1)
(PROGRAM = dg4odbc)
(HS = OK)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = oraDBsvr)(PORT = 1521))
ADR_BASE_LISTENER = /u01/app/oracle
[oracle@oraDBsvr log]$ lsnrctl status
LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 16-SEP-2013 13:57:41
Copyright (c) 1991, 2009, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=oraDBsvr)(PORT=1521)))
STATUS of the LISTENER
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 11.2.0.1.0 - Production
Start Date                16-SEP-2013 13:50:34
Uptime                    0 days 0 hr. 7 min. 7 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora
Listener Log File /u01/app/oracle/diag/tnslsnr/oraDBsvr/listener/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=oraDBsvr)(PORT=1521)))
Services Summary...
Service "acmepos" has 1 instance(s).
Instance "acmepos", status UNKNOWN, has 1 handler(s) for this service...
Service "dw" has 1 instance(s).
Instance "dw", status READY, has 1 handler(s) for this service...
Service "dwXDB" has 1 instance(s).
Instance "dw", status READY, has 1 handler(s) for this service...
The command completed successfully
Oracle tnsnames.ora
[oracle@oraDBsvr admin]$ cat tnsnames.ora
# tnsnames.ora Network Configuration File: /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.
dw =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = dw)
acmepos =
(DESCRIPTION=
(ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1521))
(CONNECT_DATA=(SID=acmepos)
(HS=OK)
Oracle sqlnet.ora
[oracle@oraDBsvr admin]$ cat sqlnet.ora
# sqlnet.ora Network Configuration File: /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/sqlnet.ora
# Generated by Oracle configuration tools.
NAMES.DIRECTORY_PATH= (EZCONNECT, TNSNAMES)
ADR_BASE = /u01/app/oracle
I can connect from the linux server to SQL Server, and query the database:
[oracle@oraDBsvr etc]$ tsql -S acme_pos -U acme_dw_user -P acme1234
locale is "en_US.utf8"
locale charset is "UTF-8"
using default charset "UTF-8"
1> select last_name from dbo.employees;
2> go
last_name
Davolio
Fuller
Leverling
Peacock
Buchanan
Suyama
King
Callahan
Dodsworth
(9 rows affected)
1>
However, I can’t get a response through Oracle OWB , and I get:
ORA-28500: connection from ORACLE to a non-Oracle system returned this message: ORA-02063: preceding line from OWB_75
In the hs log file I get:
[oracle@oraDBsvr log]$ cat acmepos_agt_3821.trc
Oracle Corporation --- MONDAY    SEP 16 2013 13:51:22.170
Heterogeneous Agent Release
11.2.0.1.0
HS Gateway: NULL connection context at exit
[oracle@oraDBsvr log]$
I am really stuck now and going round in circles and can’t see the wood for trees! Can anyone please help?!!
Many Thanks.
Rafe.

Let us rewrite your ODBC DSN a little bit... Your current odbc.ini looks like:
[ACME_POS]
Driver     = FreeTDS
Description = ODBC Connection via FreeTDS
Trace       = 1
Servername = 192.168.1.80
Database    = dbo
Let us change it a little bit so that we only need one config file - no odbcinst.ini nor freetds.conf file anymore:
[ACME_POS]
Driver =/usr/local/lib/libtdsodbc.so
Server = 192.168.1.80
Database
= dbo     #### I have some doubts that you have a SQL Server database called dbo - one database that always exists is master - so as a test use master here or get the real database name of the SQL Server database you want to connect
Port = 60801 ## make sure it really is the correct port - best would be to check on the SQL server and then try telnet <ip> <port> if you can connect to the SQL server
TDS_Version = 8.0
QuotedId=YES
Especially the last 2 parameters are mandatory. TDS_Version specifies the TDS Version you have to use to connect to the SQL Server and QuotedID is required for DG4ODBC as it surrounds objevt names by double quotes.
What happens now when you try to connect with for example isql - the ODBC test utility shipped with the ODBC Driver manager?
In addition, could you please do me another favour and check the word size of DG4ODBC and the ODBC Driver Manager as well as the ODBC Driver - just execute:
file /u01/app/oracle/product/11.2.0/dbhome_1/bin/dg4odbc
file /usr/local/lib/libtdsodbc.so
file < the patch to your libodbc.so library>/libodbc.so
and post the output.

How to recover TNSNAMES.ORA file

Hi, im using Oracle 8i 8.16 database running on win2k server. Im getting a an error whenever i try to connect to the databese using the DBA Studio program - the error was "ORA-12154:TNS:Could Not resolve service name". I noticed that the TNSNAMES.ORA file is blank in the home directory of Oracle8i, anyone knows how to recover the file?.
Thanks
regards
Muraly

Hi Friend,
Thanks alot for ur reply, i tried the solution u gave in ur reply and i manage to get some parameters setting in my tnsnames.ora file - the content of it was
as follows :
# TNSNAMES.ORA Network Configuration File: C:\Oracle\Ora81\NETWORK\ADMIN\tnsnames.ora
# Generated by Oracle configuration tools.
COGENT =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = cogent-w2ksvr)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = cogent)
but then i keep getting the same error message.
I notice that the Oracle service (undet the NT services) OracleOraHome81ManagementServer does not get started - when i try to manually start it up - NT return error saying its not startable due to windows error or application error.
The following is my setting from net8 assistant.
Service Naming
---- Service Identification ----
Service name = cogent
SID = ""
connection type = Database Default
Address Config
Protocol = TCP/IP
Hostname = cogent-w2ksvr
Port Number = 1521
My domain name is cogentconsulting.com
My Full computer name is cogent-w2ksvr.cogentconsulting.com
I really appreciate your help in this.
thanks and regards
Muraly
null

Parameters of tnsnames.ora

hello. i am new in oracle 10g and i want to take advice. i see the setting parameters of tnsnames.ora on Oracle Net Manager and i set the tnsnames.ora with it.
i developed a client application working with remote oracle 10g database on windows platforms. i developet it on VisualStudio, this application can work with both ms sql and oracle 10g. the user chooses it. when the user chooses Oracle i must create connection string and connect to the remote db.
i can implement it with two way
1. i want only connection name which is defined in tnsnames.ora and connect over it.
2. i make an interface user set the simple and advanced settings of connection parameters and i can insert them into connection string.
which way should i use. i think that it is better to set all of parameters in my application because it will be easier for user. but i think about the future versions of oracle . there may be problems on them.
what do you advice me?
thanks.

Hello user "user518019":
I'm also new in the Oracle world but I have programming since a lot of years. I would recommend to you following a simple rule:
if your applicattion is very simple you must follow the simple way to connect to DB.
By using a "tnsnames.ora" you only need to know a DB name to connect to it. In the other hand, if your are using non-default ports o also like this (per example, a more complicated enviroment) you would need a more detailed box to especify address, port number, service name, etc, etc...
I suppose Oracle will continue using "tnsnames.ora" a lot of years, but this is only a impression. I hope send you some help with this.

DBA studio: Error add/connect database "Failed to parse tnsnames.ora file"

I have Oracle (version 8.1.7) installed in my XP machine and when I try to (having chosen "Launch DBA Studio standalone") to open a connection I get:
"Failed to parse tnsnames.ora file
ERROR: 100 -- NLNV-NLNV String Format Error".
Also got this when I tried to manually add a database to a tree.
I can access the databases listed in my tnsnames.ora using SQL Plus with no error.
This is my tnsnames.ora.
# TNSNAMES.ORA Network Configuration File: C:\oracle\ora81\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.
INST1_HTTP.xx.yy.GE.COM =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = MyMachine3)(PORT = 1521))
(CONNECT_DATA =
(SERVER = SHARED)
(SERVICE_NAME = buch3ora)
(PRESENTATION = http://admin)
EXTPROC_CONNECTION_DATA.xx.yy.GE.COM =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
MyOra3.xx.yy.GE.COM =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = MyMachine3)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = ora3)
OORCL.xx.yy.GE.COM =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 3.4.55.66)(PORT = 1521))
(CONNECT_DATA = (SERVICE_NAME = oorcl))
Does anybody have any idea what is wrong? Thanks a lot. Changsong

Just found out this IS a string error in my Tnsname.ora. What i did is deleting all the entries in my tnsname.ora, and start adding each one back. I found one particular entry is responsible for the error. This is the old text
serv32.xxx.ge.com =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (COMMUNITY = TCP)(PROTOCOL = TCP)(HOST = sevr32.xxy.ge.com)(PORT = 1521))
(CONNECT_DATA = (SID = atmo32))
just looking by itself I can't see anything wrong. I just formatted it a little, making it looked like the other one that is working
serv32.xxx.ge.com =(DESCRIPTION =
     (ADDRESS_LIST =
     (ADDRESS =
     (COMMUNITY = TCP)
     (PROTOCOL = TCP)
     (HOST = sevr32.xxy.ge.com)
     (PORT = 1521)))
     (CONNECT_DATA=
     (SID = atmo32)))
and now it works fine. I Really can't tell the difference, except that some words were moved to the other line. What puzzled me is that the same old tnsname.ora worked in almost all the other circumstances, like sql plus, and other database enginee. But it is just not good enough for dba studio?
I admit I probably should have used the network utility to add a connection to avoid this type of format error.
Anyhow, I'm glad it is solved. by the way, the symjct.dll mentioned in the previous post should be symcjit.dll. I guess he mispelled the name. I renamed it to symcjit_old.dll and now the java error was gone. So that is another gain from this post. Thanks Joel for all the information.

Tnsnames.ora General Question

We are experiencing a problem that many different users seem to have many different versions of tnsnames.ora. We want to create our "gold" version and ensure that everyone uses the same one. Two questions:
1. Is the "alias" that you give each connection case sensitive? For instance if I name one connection Prod is that the same as PROD?
2. At another place I worked I was under the impression that most applications (PL/SQL Developer for sure) uses the Windows PATH environment variable to locate tnsnames.ora by going through all directories listed in the variable and using the first occurrence of tnsnames.ora that it found. Through a little testing and renaming and such I have found that this doesn't appear to be the case. We are using ADI, Discoverer, different development tools, etc and would like to avoid having more than one location where the file is stored. What is the best way around that or is there a way? I assume that it depends somewhat on each application.
Thanks in advance for the help!

PL/SQL Developer Help->Support Info TNS Names tab shows that C:\oracle\ora92\network\admin\tnsnames.ora is used as my tnsnames.ora for the application. I don't have an ORA_HOME environment variable. So where is it coming from? The path above is in my PATH variable.
So it is different for every application?
I don't have TNS_ADMIN environment variable either.
Sorry for the dumb questions. I just want to be 100% clear.
Message was edited by:
mateoc15

Tnsnames.ora and listener.ora

I am studying oracle and came accross
tnsnames.ora and listener.ora file.
Can any one tell me in simplified terms about these 2 files. what are they and what exactly they do?

When you are accessing Oracle over network you need a listerner service (usually on server box) and SQLNet or Net8 client on client machine. Listener.ora specifies the parameters for listener process and tnsnames.ora contains the SQLNet or Net8 connection informations about database server(s)

Command to determine path used to find tnsnames.ora

How can know (with command or similar) the path that uses Oracle client to find tnsnames.ora file?
We need a command because not always we have administrator permissions on a workstation to make a regedit or to see environment variables, but we have to determine causes of problem connections.
If I’m working with client on UNIX, ‘tnsping name’ command shows a path of sqlnet.ora, usually the same that tnsnames.ora is allocated. Under windows doesn’t display information about this.
For example:
On UNIX:
tnsping ####
TNS Ping Utility for IBM/AIX RISC System/6000: Version 9.2.0.4.0 - Production on 03-MAY-2007 13:55:58
Copyright (c) 1997 Oracle Corporation. All rights reserved.
Used parameter files:
/software/oracle/product/9.2.0/network/admin/sqlnet.ora
On WINDOWS:
C:\>tnsping ####
TNS Ping Utility for 32-bit Windows: Version 8.1.7.0.0 - Production on 03-MAY-20
07 13:58:51
(c) Copyright 1997 Oracle Corporation. All rights reserved.
TNS-03505: Message 3505 not found; No message file for product=NETWORK, facility
=TNS
Exists any command to do it or any command that shows this information?
Thank you very much!!!
Marc.

Hi!
In windows you also get the message what sqlnet.ora was used.
The error message you get
TNS-03505: Message 3505 not found; No message file for product=NETWORK, facility=TNSlooks like there is something wrong with your client installation, it can't find it's message file so you don't get your sqlnet.ora path. I suppose in your case knowing the location of tnsnames.ora wouldn't help since your client isn't installed correctly.
Regards,
PP

Tnsnames.ora in SQL Developer 3.0.04

Hi!
I've previously used both Toad and SQL Navigator on this computer, and they were both able to connect to all the connection strings in tnsnames.
I've manually tried adding environment variables, and setting the directory under Tools --> Preference --> Database --> Advanced.
The path is C:\Program Files\Oracle\ora92\network\ADMIN\tnsnames.ora.
When I try to create new connections, and chooses tnsnames, the drop down menu is empty.
Could you please help me?
Thanks and regards

SQL Developer is very sensitive to syntax errors in tnsnames files which are ignored by other tools including sqlplus.
Check the file very carefully for errors. Try reducing it to a single definition and adding definitions back in gradually.

TNSNAMES.ora and LISTENER.ora tuning

Hello!
I have a PE 8.1.7 installed.
When connecting fron SQL Navigator to Oracle DB I get an error message and sqlnet.log contains the following:
Fatal NI connect error 12538, connecting to:
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=myhost)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=Andrei1.domain)(CID=(PROGRAM=E:\SQL Navigator 3\sqlnav3.exe)(HOST=MYHOST)(USER=kr))))
VERSION INFORMATION:
TNS for 32-bit Windows: Version 8.1.6.0.0 - Production
Time: 30-MAR-2001 13:50:21
Tracing not turned on.
Tns error struct:
nr err code: 0
ns main err code: 12538
TNS-12538: TNS:no such protocol adapter
ns secondary err code: 12560
nt main err code: 508
TNS-00508: No such protocol adapter
nt secondary err code: 0
nt OS err code: 0
Why is it stated that TNS version is 8.1.6.0.0? Could it be that OracleOraHome81TNSListener was overwritten when I installed Designer 6i? What should I do in this case?
Configuration files are:
# TNSNAMES.ORA Network Configuration File: E:\oracle\ora81\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.
ANDREI1 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = myhost)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = Andrei1.domain)
GIOP =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = myhost)(PORT = 2481))
(CONNECT_DATA =
(SERVICE_NAME = Andrei1.domain)
INST1_HTTP =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = myhost)(PORT = 1521))
(CONNECT_DATA =
(SERVER = SHARED)
(SERVICE_NAME = Andrei1.domain)
(PRESENTATION = http://admin)
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
# LISTENER.ORA Network Configuration File: E:\oracle\ora81\network\admin\listener.ora
# Generated by Oracle configuration tools.
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = myhost)(PORT = 1521))
(DESCRIPTION =
(PROTOCOL_STACK =
(PRESENTATION = GIOP)
(SESSION = RAW)
(ADDRESS = (PROTOCOL = TCP)(HOST = myhost)(PORT = 2481))
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = E:\oracle\ora81)
(PROGRAM = extproc)
(SID_DESC =
(GLOBAL_DBNAME = Andrei1.domain)
(ORACLE_HOME = E:\oracle\ora81)
(SID_NAME = Andrei1)
null

What are the wait events you are getting?
You got to be careful with SDU packet size, mostly the default is suitable for all the environments. If you increase the packet size to say 8K, you may be wasting the space if you are not able to utilizing all 8K. That would have an adverse affect as well.

Possible to use 2 tnsnames.ora for just one client?

Hi,
in our organisation we have two different tnsnames.ora files. This because of the
fact that there are remote locations each with their own IT department. Each department maitains their own databases, but applications are spread over the whole organisation.
What I would like to to create is a tnsnames.ora in which there is an e.g. include c:\oracle\tnsnames.ora and include c:\oracle1\tnsnames.ore. Would that be possible?
Fred

If what you want to achieve is a situation where different users use the same PC, but you want to limit the tnsnames they have access to, what if you try setting the TNS_ADMIN environment variable to point to the permitted directory for each user env profile.
e.g
user1
TNS_ADMIN=c:\oracle\network\admin\user1
c:\oracle\network\admin\user1\tnsnames.ora
c:\oracle\network\admin\user1\sqlnet.ora
user2
TNS_ADMIN=c:\oracle\network\admin\user2
c:\oracle\network\admin\user2\tnsnames.ora
c:\oracle\network\admin\user2\sqlnet.ora
etc.

EM doesn't allow creation of tnsnames.ora entry with service name orcl11gr2

Dear all,
I'm trying to create a net service name with EM Database Control, via Net Services Administration link. On the service name field, under the 'Edit Net Service Name' screen, I key in orcl11gr2, and it throws the the following error:
Validation Error
Examine and correct the following errors, then retry the operation:
Service Name - Specify a valid service name.
I wonder what is the extra validation that EM is checking. I assume it's checking the number of characters to be 8 characters or less.
Also, because of this extra validation that is in EM, all tnsnames.ora entry that have service name = orcl11gr2, I will not be able to use EM to modify them, as I will get the same above error.
But why does Oracle implements this extra validation, when the same validation is not implemented on other Oracle tools? For instance:
1. dbca allows me to create a database with instance_name greater than 8 characters, and the outcome of initialization parameters will be as follow:
db_name=orcl11gr -- truncated to 8 characters
instance_name=orcl11gr2
db_unique_name=orcl11gr2
service_names=orcl11gr2
2. Oracle Net Manager supports service name of orcl11gr2. The created Net Service Name, I have no problem connecting to the database.
3. Listener support orcl11gr2 service name
I'm using Oracle 11g R2 (11.2.0.1.0) for Microsoft Windows (x64), running on Windows 7.

For your reference, here is the bug numbner: 10278345.
-Mughees

Getting host, port from the tnsnames.ora with the service name

Hi.
I think that I asked a similar question yesterday. I want to ask if there is a way to get host and port from the tnsnames.org with a given service name. Somebody answered it for getting SID in the sqlplus. so I tried it in a similar way, but it didn't work.
I have a service name, but I don't know how to get host and port. I know that I can parse the tnsnames.ora file to get it, but if possible, I want to use the more official and safe way.
I'd appreciated if somebody knows it.

caesarkim wrote:
Hi.
I think that I asked a similar question yesterday. I want to ask if there is a way to get host and port from the tnsnames.org with a given service name. Somebody answered it for getting SID in the sqlplus. so I tried it in a similar way, but it didn't work.
I have a service name, but I don't know how to get host and port. I know that I can parse the tnsnames.ora file to get it, but if possible, I want to use the more official and safe way.
I'd appreciated if somebody knows it.Oracle RDBMS does not require SQL*Net to operate.
Oracle RDBMS does NOT now or care about content of any tnsnames.ora file.
Realize that each (remote) user can have their own personalized copy of tnsnames.ora
The content of tnsnames not NOT have to reflect any reality.
I could post the content of my tnsnames.ora & it would be useless to everyone reading.

DNS vs. Oracle Name Service vs. tnsnames.ora

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