Listener setup when using multiple databases on same cluster

Hi,
In our 2-node RAC cluster, we have 5 databases running on the same cluster. Since we are using SCAN listener on port #1521, does this mean db port# for all databases is 1521?
If I decide to use a unique port# (other than SCAN port#), what are the choices?
ENV: 11gR2, 2-node RH 5.x
Thanks!

The answer to your question depends on how it was configured.
My recommendation ... run some tests and see if that is the way it was done.

Similar Messages

Cannot use multiple database in my application

I have written a C++/CLI wrapper for use berkeleydb without lost performance. This wrapper run perfectly with one database but when i open a second database ( i create a new instance of the wrapper ) the application crash.
I have written a minimal pure C++ application that use the pure C++ classe of my wrapper, when a open and use only one database the code run perfectly but with two databases, the application be crazy.
infos : compiler VC++ 2008, OS : Vista 32bit
this the code of my berkeleydb class :
#pragma comment (lib, "libdb47.lib")
#if defined(WIN32) || defined(WIN64)
#include <windows.h>
#include <list>
#endif
#ifndef ParamsStructCpp
#include "ParamsStruct.h"
#endif
#include <db_cxx.h>
#include "BerkeleyMethods.h"
using namespace std;
using namespace stdext;
// type
//typedef list<ParamsStructCpp>::iterator it;
typedef list<ParamsStructCpp> fetchbuffer;
// Db objects
Db * db; // Database object
DbEnv env(0); // Environment for transaction
u_int32_t oFlags = DB_CREATE|DB_AUTO_COMMIT|DB_READ_UNCOMMITTED; // Open flags; //
u_int32_t env_oFlags = DB_CREATE |
DB_THREAD |
                         DB_INIT_LOCK |
                         DB_INIT_LOG |
                         DB_INIT_MPOOL |
                         DB_INIT_TXN |
                         DB_MULTIVERSION; // Flags for environement
// Constructeurs
BerkeleyMethods::BerkeleyMethods()
BerkeleyMethods::BerkeleyMethods(char * dbname, unsigned int db_cache_gbyte, unsigned int db_cache_size,
                    int db_cache_number, int db_type, char * dberr_file, char * envdir, unsigned int dbtxn_timeout,
                         unsigned int dbtxn_max)
     strcpy_s(this->db_name, strlen(_db_name)+1, dbname);
     this->db_cache_gbyte = db_cache_gbyte;
this->db_cache_size = db_cache_size;
     this->db_cache_number = db_cache_number;
this->db_type = db_type;
     this->db_txn_timeout = dbtxn_timeout;
     this->db_txn_max = dbtxn_max;
     strcpy_s(this->db_err_file, strlen(_db_err_file)+1, dberr_file);
     strcpy_s(this->env_dir, strlen(_env_dir)+1, envdir);
     this->Set_restoremode(false);
// ==========
// Fonctions
// http://www.codeproject.com/KB/string/UtfConverter.aspx
bool BerkeleyMethods::OpenDatabase()
     try
          std::cout << "Dbname " << this->db_name << std::endl;
          if (strlen(this->db_name) < 2) {
throw new std::exception("Database name is unset");
          // Set database cache
          env.set_cachesize(this->db_cache_gbyte, this->db_cache_size, this->db_cache_number);
          // Set transaction timeout
          if (this->db_txn_timeout > 0) {
               env.set_timeout(this->db_txn_timeout, DB_SET_TXN_TIMEOUT);
// Set max opened transactions
          if (this->db_txn_max > 0) {
               env.set_tx_max(this->db_txn_max);
          // Dupplicate key support;
          if (this->Get_dup_support()) {
env_oFlags = env_oFlags|DB_DUPSORT;
          // Deadlokcs gesture
          env.set_lk_detect(DB_LOCK_MINWRITE);
// Set the error file
          env.set_errfile(fopen(this->db_err_file, "w+"));
// Error prefix
          env.set_errpfx("Error > ");
          // Open environement
          env.open(this->env_dir, env_oFlags, 0);
          // Create database object
          db = new Db(&env, 0);
          // Open the database
          switch(this->db_type)
          case 1:
               db->open(NULL, this->db_name, NULL, DB_BTREE, oFlags, 0);
               break;
          case 2:
               db->open(NULL, this->db_name, NULL, DB_HASH, oFlags, 0);
               break;
          case 3:
               db->open(NULL, this->db_name, NULL, DB_QUEUE, oFlags, 0);
               break;
          case 4:
               db->open(NULL, this->db_name, NULL, DB_RECNO, oFlags, 0);
               break;
          default:
               throw new std::exception("Database name is unset");
               break;
          u_int32_t gbcacheSize = 0;
u_int32_t bytecacheSize=0;
int ncache=0;
env.get_cachesize(&gbcacheSize,&bytecacheSize,&ncache);
std::cerr << "Taille du cache est:" << gbcacheSize << "Go plus " << bytecacheSize << " octets." << std::endl;
std::cerr << "Number of caches : " << ncache << std::endl;
          return true;
     catch(DbException &e)
          std::cout << e.what() << std::endl;
     catch(std::exception &e)
          std::cout << e.what() << std::endl;
     return false;
bool BerkeleyMethods::CloseDatabase()
     try
          db->close(0);
          env.close(0);
          return true;
     catch(DbException &e)
          std::cout << e.what() << std::endl;
     catch(std::exception &e)
          std::cout << e.what() << std::endl;
     return false;
bool BerkeleyMethods::AddData(char * key, unsigned long int value)
     if (this->Get_restoremode())
          return false;
     DbTxn * txn;
     try
          env.txn_begin(NULL, &txn, 0); // Bebin transaction
          // Set datas
Dbt _key(key, strlen(key)+1);
Dbt _value(&value, sizeof(unsigned long int));
          env.txn_checkpoint(512, 2, 0);
          int exist = db->put(txn, &_key, &_value, DB_NOOVERWRITE);
          if (exist == DB_KEYEXIST) {
               std::cout << "This record already exist" << std::endl;
          txn->commit(0);
          return true;
     catch(DbException &e)
          std::cout << e.what() << std::endl;
          txn->abort();
     catch(...)
          std::cout << "Error" << std::endl;
          txn->abort();
     return false;
bool BerkeleyMethods::AddData(unsigned long int key, char * value)
     if (this->Get_restoremode())
          return false;
     DbTxn * txn;
     try
          env.txn_begin(NULL, &txn, 0); // Bebin transaction
Dbt _key(&key, sizeof(unsigned long int));
          Dbt _value(value, strlen(value)+1);
          env.txn_checkpoint(512, 2, 0);
          int exist = db->put(txn, &_key, &_value, DB_NOOVERWRITE);
          if (exist == DB_KEYEXIST) {
               std::cout << "This record already exist" << std::endl;
          txn->commit(0);
          return true;
     catch(DbException &e)
          std::cout << e.what() << std::endl;
          txn->abort();
     catch(...)
          txn->abort();
     return false;
bool BerkeleyMethods::AddData(char * key, char * value)
     if (this->Get_restoremode())
          return false;
     DbTxn * txn;
     try
          env.txn_begin(NULL, &txn, 0); // Bebin transaction
Dbt _key(key, strlen(key)+1);
          Dbt _value(value, strlen(value)+1);
          env.txn_checkpoint(512, 2, 0);
          int exist = db->put(txn, &_key, &_value, DB_NOOVERWRITE);
          if (exist == DB_KEYEXIST) {
               std::cout << "This record already exist" << std::endl;
          txn->commit(0);
          return true;
     catch(DbException &e)
          std::cout << e.what() << std::endl;
          txn->abort();
     catch(...)
          txn->abort();
     return false;
bool BerkeleyMethods::AddData(unsigned long int key, unsigned long int value)
     if (this->Get_restoremode())
          return false;
     DbTxn * txn;
     try
          env.txn_begin(NULL, &txn, 0); // Bebin transaction
Dbt _key(&key, sizeof(unsigned long int));
          Dbt _value(&value, sizeof(unsigned long int));
          env.txn_checkpoint(512, 2, 0);
          int exist = db->put(txn, &_key, &_value, DB_NOOVERWRITE);
          if (exist == DB_KEYEXIST) {
               std::cout << "This record already exist" << std::endl;
          txn->commit(0);
          return true;
     catch(DbException &e)
          std::cout << e.what() << std::endl;
          txn->abort();
     catch(...)
          txn->abort();
     return false;
bool BerkeleyMethods::AddData(char * key, ParamsStructCpp value)
     if (this->Get_restoremode())
          return false;
     DbTxn * txn;
     try
          env.txn_begin(NULL, &txn, 0); // Bebin transaction
Dbt _key(key, strlen(key)+1);
          Dbt _value(&value, sizeof(ParamsStructCpp));
          env.txn_checkpoint(512, 2, 0);
          int exist = db->put(txn, &_key, &_value, DB_NOOVERWRITE);
          if (exist == DB_KEYEXIST) {
               std::cout << "This record already exist" << std::endl;
          txn->commit(0);
          return true;
     catch(DbException &e)
          std::cout << e.what() << std::endl;
          txn->abort();
     catch(...)
          txn->abort();
     return false;
bool BerkeleyMethods::AddData(unsigned long int key, struct ParamsStructCpp value)
     if (this->Get_restoremode())
          return false;
     DbTxn * txn;
     try
          env.txn_begin(NULL, &txn, 0); // Bebin transaction
Dbt _key(&key, sizeof(unsigned long int));
          Dbt _value(&value, sizeof(ParamsStructCpp));
          env.txn_checkpoint(512, 2, 0);
          int exist = db->put(txn, &_key, &_value, DB_NOOVERWRITE);
          if (exist == DB_KEYEXIST) {
               std::cout << "This record already exist" << std::endl;
          txn->commit(0);
          return true;
     catch(DbException &e)
          std::cout << e.what() << std::endl;
          txn->abort();
     catch(...)
          txn->abort();
     return false;
bool BerkeleyMethods::Exist(unsigned long int key)
     if (this->Get_restoremode())
          return true;
     DbTxn * txn;
     try
          env.txn_begin(NULL, &txn, DB_TXN_SNAPSHOT); // Bebin transaction
Dbt _key(&key, sizeof(unsigned long int));
          int state = db->exists(txn, &_key, DB_READ_COMMITTED);
          txn->commit(0);
          if (state == 0) {
               return true;
     catch(DbException &e)
          std::cout << e.what() << std::endl;
          txn->abort();
     catch(...)
          txn->abort();
     return false;
bool BerkeleyMethods::Exist(char * key)
     if (this->Get_restoremode())
          return true;
     DbTxn * txn;
     try
          env.txn_begin(NULL, &txn, DB_TXN_SNAPSHOT); // Bebin transaction
          Dbt _key(key, strlen(key)+1);
          int state = db->exists(txn, &_key,DB_READ_COMMITTED);
          txn->commit(0);
          if (state == 0) {
               return true;
     catch(DbException &e)
          std::cout << e.what() << std::endl;
          txn->abort();
     catch(...)
          txn->abort();
     return false;
void BerkeleyMethods::GetData (char * pData, int nbr, unsigned long int key)
     if (this->Get_restoremode())
          return;
     DbTxn * txn;
     Dbc *dbcp;
     try
env.txn_begin(NULL, &txn, DB_TXN_SNAPSHOT); // Bebin transaction
          db->cursor(txn, &dbcp, 0);
          Dbt _key;
          Dbt data;
          key.setdata(&key);
          key.setsize(sizeof(unsigned long int));
          dbcp->get(&_key, &data, DB_FIRST);
          char * temp = (char *)data.get_data();
strcpy_s(pData, strlen(temp)+1, temp);
          dbcp->close();
          txn->commit(0);
     catch(DbException &e)
          std::cout << e.what() << std::endl;
          if (dbcp != NULL)
               dbcp->close();
          if (txn != NULL)
               txn->abort();
     catch(...)
          if (dbcp != NULL)
               dbcp->close();
          if (txn != NULL)
               txn->abort();
unsigned long int BerkeleyMethods::GetData(char * key)
     if (this->Get_restoremode())
          return 0;
     DbTxn * txn;
     Dbc *dbcp;
     try
env.txn_begin(NULL, &txn, DB_TXN_SNAPSHOT); // Bebin transaction
          db->cursor(txn, &dbcp, 0);
Dbt _key;
          Dbt data;
          key.setdata(key);
          key.setulen(strlen(key)+1);
          dbcp->get(&_key, &data, DB_FIRST);
unsigned long int xdata = *((unsigned long int *)data.get_data());
          dbcp->close();
          txn->commit(0);
          return xdata;
     catch(DbException &e)
          std::cout << e.what() << std::endl;
          dbcp->close();
          txn->abort();
     catch(...)
          dbcp->close();
          txn->abort();
     return 0;
ParamsStructCpp * BerkeleyMethods::GetData(unsigned long int key, bool null)
     if (this->Get_restoremode()) {
          return new ParamsStructCpp();
     DbTxn * txn;
     Dbc *dbcp;
     try
env.txn_begin(NULL, &txn, DB_TXN_SNAPSHOT); // Bebin transaction
          db->cursor(txn, &dbcp, 0);
          Dbt _key;
          Dbt data;
          key.setdata(&key);
          key.setsize(sizeof(unsigned long int));
dbcp->get(&_key, &data, DB_FIRST);
          ParamsStructCpp * temp = (ParamsStructCpp *)data.get_data();
          dbcp->close();
          txn->commit(0);
          return temp;
     catch(DbException &e)
          std::cout << e.what() << std::endl;
          dbcp->close();
          txn->abort();
     catch(...)
          dbcp->close();
          txn->abort();
     return new ParamsStructCpp();
ParamsStructCpp * BerkeleyMethods::GetData(char * key, bool null)
     if (this->Get_restoremode()) {
          return new ParamsStructCpp();
     DbTxn * txn;
     Dbc *dbcp;
     try
env.txn_begin(NULL, &txn, DB_TXN_SNAPSHOT); // Bebin transaction
          db->cursor(txn, &dbcp, 0);
Dbt _key;
          Dbt data;
          key.setdata(key);
          key.setulen(strlen(key)+1);
          dbcp->get(&_key, &data, DB_FIRST);
ParamsStructCpp * xdata = (ParamsStructCpp *)data.get_data();
          dbcp->close();
          txn->commit(0);
          return xdata;
     catch(DbException &e)
          std::cout << e.what() << std::endl;
          dbcp->close();
          txn->abort();
     catch(...)
          dbcp->close();
          txn->abort();
     return new ParamsStructCpp();
list<ParamsStruct> BerkeleyMethods::FetchAllDatabase ()
     list<ParamsStruct> temp;
     Dbc *dbcp;
     try
          db->cursor(NULL, &dbcp, 0);
Dbt _key;
          Dbt data;
while(dbcp->get(&_key, &data, DB_NEXT))
               unsigned long int key = *((unsigned long int *)_key.get_data());
               char * datetime = (char *)data.get_data();
               ParamsStruct p;
               strcpy_s(p.lastaccess, strlen(datetime)+1, datetime);
               p.downloaded
               temp.push_back(
               //temp.insert(Tuple(datetime, key));
     catch(DbException &e)
          std::cout << e.what() << std::endl;
     catch(...)
     return temp;
bool BerkeleyMethods::DeleteData(unsigned long int key)
     if (this->Get_restoremode())
          return true;
     DbTxn * txn;
     try
          env.txn_checkpoint(128, 1, 0);
          env.txn_begin(NULL, &txn, 0); // Bebin transaction
Dbt _key;
          key.setdata(&key);
          key.setsize(sizeof(unsigned long int));
          db->del(txn, &_key, 0);
          txn->commit(0);
          return true;
     catch(DbException &e)
          std::cout << e.what() << std::endl;
          txn->abort();
     catch(...)
          txn->abort();
     return false;;
bool BerkeleyMethods::DeleteData(char * key)
     if (this->Get_restoremode())
          return true;
     DbTxn * txn;
     try
          env.txn_begin(NULL, &txn, 0); // Bebin transaction
Dbt _key;
          key.setdata(key);
          key.setulen(strlen(key)+1);
          db->del(txn, &_key, 0);
          txn->commit(0);
          return true;
     catch(DbException &e)
          std::cout << e.what() << std::endl;
          txn->abort();
     catch(...)
          txn->abort();
     return false;
int BerkeleyMethods::Sync()
     if (this->Get_restoremode())
          return -1;
     try
          return db->sync(0);
     catch(...)
return -1;
int BerkeleyMethods::Count()
     if (this->Get_restoremode())
          return -1;
     Dbc *dbcp;
     int count = 0;
     try
Dbt key;
          Dbt data;
          db->cursor(NULL, &dbcp, 0);
          while (dbcp->get(&key, &data, DB_NEXT) == 0) {
count++;
          dbcp->close();
          return count;
     catch(...)
return -1;
BerkeleyMethods::~BerkeleyMethods()
     if (db) {
     db->sync(0);
db->close(0);
     env.close(0);
=====
The code the use this class :
     BerkeleyMethods db("test.db", 0, 524288000, 1, 1, "log.txt", "./Env_dir", 1000000 * 5, 600000);
               BerkeleyMethods db1("test2.db", 0, 524288000, 1, 1, "log2.txt", "./Env_dir2", 1000000 * 5, 600000);
bool z = db.OpenDatabase();
db1.OpenDatabase();
if (z)
                    std::cout << "Base de données ouverte" << std::endl;
               for (unsigned int i = 0; i < 1000; i++)
                    ParamsStructCpp p = { 10, "02/08/2008 14:46:23", 789 };
               bool a = db.AddData(i, p);
                    db1.AddData(i, p);
if (a)
                    std::cout << "Ajout de données ok" << std::endl;
               for (unsigned int i = 0; i < 1000; i++)
                    ParamsStructCpp * c = db.GetData(i, false);
                    ParamsStructCpp * c1 = db1.GetData(i, false);
                    std::cout << "Donné récupéré " << c->downloaded << " : " << c->lastaccess << " : " << c->waittime << std::endl;
                    std::cout << "Donné récupéré " << c1->downloaded << " : " << c1->lastaccess << " : " << c1->waittime << std::endl;
/ ====
The application output show that when using two database the data is not correctly set. It seems that db and db1 is the same object :|.
For example in db i insert a key => toto with value 4, and in db1 i insert the same value nomaly have no problem. But berkeleydb say the the key toto in db1 already exist while not
I don't understand.
NB : sorry for my english

Michael Cahill wrote:
As a side note, it is unlikely that you want both
DB_READ_UNCOMMITTED and DB_MULTIVERSION to be set.
This combination pays a price during updates for
maintaining multiple versions, but still requires
(short term) locks to be held during reads. The BDB/XML Transaction Processing Guide states the following:
[...]in addition to BDB XML's normal degrees of isolation, you can also use snapshot isolation. This allows you to avoid the read locks that serializable isolation requires.
http://www.oracle.com/technology/documentation/berkeley-db/xml/gsg_xml_txn/cxx/isolation.html
This seems to contradict what you're saying here.
Is there a general guideline on whether or not to use MVCC together with a relaxed isolation degree like DB_READ_UNCOMMITTED? Should the statement in the BDB/XML TP Guide rather have "as an alternative to" instead of "in addition to"?
Michael Ludwig

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2. Hubs filled with USB drives are never reliable.. disks refuse to spin up.. become unavailable.
No.. don't do it.
Plug USB3 hub into the mini and use multiple decent hard drives .. that is fine.. use thunderbolt hub.. use thunderbolt drives if you can afford it.. but never use USB drives on the network.
3. Time Machine is not reliable to external drive on Airport Extreme.. Apple do not support it in any Extreme except the latest one.
If you want the material available to the network buy a NAS. You can buy a cheap NAS of 8TB or so and another 8TB of USB drives which you plug into the NAS for backup.. however.. iphoto is not supposed to ever be put on network drives..
Apple explicitly states you will corrupt it.
http://support.apple.com/kb/TS5168 Although mostly about FAT32           it adds network drives.
http://support.apple.com/kb/HT1198
And I quote
It's recommended that you store your iPhoto library on a locally mounted hard drive. Storing your iPhoto library on a network share can lead to poor performance, data corruption, or data loss. If you use both iPhoto and Aperture with the same library, using a Mac OS X Extended formatted volume is recommended. For more information, see Aperture: Use locally mounted Mac OS X Extended volumes for your Aperture library.
For backup of the drives.. use Carbon Copy Cloner.. it is much better than TM as you can setup different job.. TM is really a single function.. !!

TDE Wallets & Multiple Databases on same Host

The Oracle TDE Best Practices (doc ID 130696) states this:
Multiple databases on the same host
If there are multiple Oracle Databases installed on the same server, they
must access their own individual TDE wallet. Sharing the same wallet between independent instances is not supported
and can potentially lead to the loss of encrypted data.
If the databases share the same ORACLE_HOME, they also share the same
sqlnet.ora file in $TNS_ADMIN . In order to access their individual wallet, the
DIRECTORY entry for the ENCRYPTION_WALLET_LOCATION
needs to point each database to its own wallet location:
DIRECTORY= /etc/ORACLE/WALLETS/$ORACLE_UNQNAME
The names of the subdirectories under /etc/ORACLE/WALLETS/ reflect
the ORACLE_UNQNAME names of the individual databases.
If the databases do not share the same ORACLE_HOME, they will also have their individual sqlnet.ora
files that have to point to the individual subdirectories.
What is the correct sqlnet.ora syntax to do this? I currently have what is below but it doesn't seem to be correct:
ENCRYPTION_WALLET_LOCATION =
(SOURCE = (METHOD = FILE)
(METHOD_DATA =
(DIRECTORY = /local/oracle/admin/wallet/DB#1)
(DIRECTORY = /local/oracle/admin/wallet/DB#2)

Hi,
You can check this :Setting ENCRYPTION_WALLET_LOCATION For Wallets Of Multiple Instances Sharing The Same Oracle Home (Doc ID 1504783.1)
i haven't done this for multiple database, but as per Doc you can use the syntex like
ENCRYPTION_WALLET_LOCATION =
(SOURCE = (METHOD = FILE)
(METHOD_DATA =
(DIRECTORY = /local/oracle/admin/wallet/$ORACLE_UNQNAME)
Whenever you set the Environmnet with
export $ORACLE_UNQNAME=DB#1
it will choose the file from respective directory like /local/oracle/admin/wallet/DB#1
HTH

When using the Database Connectivity Toolset, reads and writes with long binary fields are incompatible.

I am trying to write LabVIEW Variants to long binary fields in a .mdb file using the Database Connectivity Toolset. I get errors when trying to convert the field back to a variant after reading it back from the database.
I next tried flattening the variant before writing it and ultimately wound up doing the following experiments:
1) If I use DB Tools Insert Data to write an ordinary string and read it back using a DB Tools Select Data, the string is converted from ASCII to Unicode.
2) If I use DB Tools Create Parameterized Query to do an INSERT INTO or an UPDATE operation, specifying that the data is BINARY, then read it back using a DB Tools Select Data,
the length of the string is prepended to the string itself as a big-endian four-byte integer.
I can't think of any way to do a parameterized read, although the mechanism exists to return data via parameters.
Presuming that this same problem affects Variants when they are written to the database and read back, I could see why I get an error. At least with flattened strings I have the option of discarding the length bytes from the beginning of the string.
Am I missing something here?

David,
You've missed the point. When a data item is flattened to a string, the first four bytes of the string are expected to be the total length of the string in big-endian binary format. What is happening here is that preceding this four-byte length code is another copy of the same four bytes. If an ordinary string, "abcdefg" is used in place of the flattened data item, it will come back as <00><00><00><07>abcdefg. Here I've used to represent a byte in hexadecimal notation. This problem has nothing to do with flattening and unflattening data items. It has only to do with the data channel consisting of writing to and reading from the database.
I am attaching three files that you can use to demonstrate the problem. The VI file c
ontains an explanation of the problem and instructions for installing and operating the demonstration.
Ron Martin
Attachments:
TestLongBinaryFields.vi ‏132 KB
Sample.UDL ‏1 KB
Sample.mdb ‏120 KB

Problem using multiple contexts in same thread

Hello,
I am having problem using multiple contexts in the same thread. Here is the scenario:
front-end is calling a ejb1 with a user1 and password. Ejb1 is then calling ejb2
using user2 and password. I am getting security exception when calling ejb2 with
the message user1 is not authorized. Looking at the documentation, context 2 should
be pushed on stack on top of context 1 and context 2 should then be used until
context.close() is called. It looks like this is not the case in this scenario?
Regards,
Jeba Bhaskaran

I have the GTX670. So pretty much the same.
When I go to Edit>Preferences>Playback I see:
When I select the monitor I am not currently using for Premiere Pro, the Program Monitor shows up full size at 1920X1080 in that monitor.
While that may not help you, at least you know a similar card can do the job and you know that it should work.. What happens if you drop down to two monitors? Will it work then?
Also, have you performed the hack that allows Premiere Pro to use the card since that card is not in the file? I have no idea if that is relevant at all, by the way. It is just an attempt at getting our systems to work the same way.

** Is it not possible to use 2 database in same XI server

Hi friends,
We were able to connect to oracle database thru JDBC adapter previously. To connect to SQL server , we have installed JDBC drivers for Microsoft SQL Server 2000 in same XI server. Now, we are able to connect to SQL server table but not able to connect to Oracle table . When change the CC and give the Oracle driver and Connection string, it throws an error 'SAPClassnotFoundException'.
So, Is it not possible to connect to different database in same XI system ?
Kindly reply friends,
Kind Regards,
Jeg P.

1) Verify the DB URL by connecting database using Command line SQL plus or any SQL editor.
2) Check wether the Drivers deployed are supported for the Oracle Db version and JDK version on XI server and OS type ( Solaris )
Check this URL for details on JDBC drivers support list -
Re: Different Version Oracle in a SLD
SAPClassNotFoundException: oracle.jdbc.driver.OracleDriver' --> This error clearly implies that the OracleDriver has not been installed on your XI server.
Ask you admin team to do the needful and install the Oracle Drivers.
regards
kummari

Multiple databases on same server

we're planning to consolidate our SAP R/3 databases on a 64bit based cluster running Windows 2003/SQL Server 2005.
the "SAP with Microsoft SQL Server 2005: Best Practices for High Availability, Maximum Performance, and Scalability" document states "SAP products support multiple instances of SQL Server 2005 on the same server. However, running the database of the SAP production system together with other application databases on one server is not recommended." and "An alternative is to run two or three SAP databases on one SQL Server 2005 instance.".
giving this, I'd like to know if it's not recommended even if the 'other application databases' are related to other instances of SAP R/3 product.
it would be useful to know why one SQL Server instance with multiple SAP databases is better than multiple SQL Server instances with one SAP database for each.
thank you.

Dear Matro,
Please review the following thread:
Multiple database instances on single server on SQL2005
I also note that you state your database server is clustered using MSCS. If this is the case you should not use a "Named Instance". If you download the latest Netweaver 2004s Installation guide (SR1) for Windows SQL you will note that on page 172 it specifically states that you must install a "default instance".
If you plan to consolidate several SAP database systems on one host and use a default instance you need to consider the fact that all databases running on this instance will share resources such a memory cache etc.
Factors such as the size of the SAP systems, whether the systems are OLTP will influence your decision
Please post if you have any additional questions.
Thanks
N.P.C

Issues when running multiple apps on same JRE?

I've created an application that launches other Java applications, all running on the same JRE. I've noticed that this results in significant memory savings (60% or more). Performance doesn't seem to be measurably affected, but I've never run more than 4 applications at the same time on the same JRE.
Does anyone know of any performance issues in situations like this? JRE limitations? Any information would be appreciated.

"It's just not obvious from the 1.3 API docs that the classLoader is what's responsible for associating a set of classes with a set of threads."
No, that's not what I was implying. The default classloader caches the definition of previously loaded classes (ie, bytecode, static variables). By default, there is no way to unload a class. Static variables will also retain their values -- which could confuse an application that is run multiple times.
This is the suggested implementation defined in the JVM spec:
http://java.sun.com/docs/books/vmspec/html/ConstantPool.doc.html
Basically, if a class has already been loaded, it returns it. You can write your own custom classload to prevent this (as the link you found suggests) or use multiple classloaders.
Imagine what happens when you write an application and then recompile a class WHILE running your application. Will the next instance of that class be updated? The answer depends on whether your classloader will reload the class from disk, or use a cached instance in memory (as the default one does).

HELP! Oracle FailSafe - Listener fails when adding standalone database

Well, I have a cluster of two nodes with the following specs:
(1) an Oracle 10g database each
(2) Microsoft Cluster Service (MSCS)
(3) Windows Server 2003 64-bit edition
(4) Intel Itanium Processor
(5) Oracle Failsafe 3.3.3 for Windows 2003 64-bit
The 64-bit Oracle Failsafe doesn't come with Oracle Failsafe Manager, so I used a Failsafe Manager remotely from another clustered servers. The version is also 3.3.3, but it's running on a Windows 2000 Advanced Server.
Well, after connecting to the 64-bit cluster, I added the standalone database to a Cluster Group. There are two cluster groups on the Server:
(1)"Cluster Group" (the default cluster group created by MSCS); containing an IP address, a network name, Oracle Cluster Services, and the Quorum hard drive.
(1)"ORACLE DB" A cluster gropu I created for the database; containing another IP address, a network name for the IP address, and every hard drive volumes of the database files.
The database currently resides on the Node 2 (because I created it there). I have successfully verified the database (using "Verify Standalone Database" option). BUT when I added the database into the cluster group ORACLE DB, it failed with the following message:
23 20:48:48 ** ERROR : FS-10066: Failed to start Windows service OracleOraDb10g_home1TNSListener for the Oracle Net listener
When I opened the Windows Event Viewer, apparently the Listener Service had started, but it soon "terminated unexpectedly":
At first, the Listener Service appeared to be started:
But this is what happened next; it seemed the Listener Service terminated abruptly after entering the running state for a very short time:
What happened? What should I do? What is the problem? Many thanks!
PS: the following are the messages from both Verifying Standalone Database and Adding Standalone Database. The verification was successfull, but I just failed to add the database:
>
Versions: client = 3.3.3 server = 3.3.3 OS =
Operation: Verifying standalone database "PAYMENT"
Starting Time: May 11, 2005 19:50:11
Elapsed Time: 0 minutes, 4 seconds
1 19:50:11 Starting clusterwide operation
2 19:50:11 FS-10915: POSDB2 : Starting the verification of standalone resource PAYMENT
3 19:50:11 FS-10371: POSDB2 : Performing initialization processing
4 19:50:11 FS-10371: POSDB1 : Performing initialization processing
5 19:50:12 FS-10372: POSDB2 : Gathering resource owner information
6 19:50:12 FS-10372: POSDB1 : Gathering resource owner information
7 19:50:12 FS-10373: POSDB2 : Determining owner node of resource PAYMENT
8 19:50:12 FS-10374: POSDB2 : Gathering cluster information needed to perform the specified operation
9 19:50:12 FS-10374: POSDB1 : Gathering cluster information needed to perform the specified operation
10 19:50:12 FS-10375: POSDB2 : Analyzing cluster information needed to perform the specified operation
11 19:50:12 FS-10378: POSDB2 : Preparing for configuration of resource PAYMENT
12 19:50:12 ** WARNING : FS-10247: The database parameter file H:\PAYMENT\admin\pfile\pfilePAYMENT.ora specified for this operation will override the parameter file value in the registry
13 19:50:12 ** WARNING : FS-10248: At registry key SOFTWARE\ORACLE\KEY_OraDb10g_home1, value of ORA_PAYMENT_PFILE is H:\PAYMENT\admin\pfile
14 19:50:12 FS-10916: POSDB2 : Verification of the standalone resource
15 19:50:12 > FS-10341: Starting verification of database PAYMENT
16 19:50:13 > FS-10342: Starting verification of Oracle Net configuration information for database PAYMENT
17 19:50:13 > FS-10496: Generating the Oracle Net migration plan for PAYMENT
18 19:50:13 > FS-10491: Configuring the Oracle Net service name for PAYMENT
19 19:50:13 > FS-10343: Starting verification of database instance information for database PAYMENT
20 19:50:13 >> FS-10347: Checking the state of database PAYMENT
21 19:50:13 >> FS-10425: Querying the disks used by the database PAYMENT
22 19:50:15 > FS-10344: Starting verification of Oracle Intelligent Agent for database PAYMENT
23 19:50:15 > FS-10345: Verification of standalone database PAYMENT completed successfully
24 19:50:15 FS-10917: POSDB2 : Standalone resource PAYMENT was verified successfully
25 19:50:15 FS-10378: POSDB1 : Preparing for configuration of resource PAYMENT
26 19:50:15 FS-10916: POSDB1 : Verification of the standalone resource
27 19:50:15 > FS-10341: Starting verification of database PAYMENT
28 19:50:15 > FS-10342: Starting verification of Oracle Net configuration information for database PAYMENT
29 19:50:15 > FS-10496: Generating the Oracle Net migration plan for PAYMENT
30 19:50:15 > FS-10491: Configuring the Oracle Net service name for PAYMENT
31 19:50:15 > FS-10343: Starting verification of database instance information for database PAYMENT
32 19:50:15 > FS-10344: Starting verification of Oracle Intelligent Agent for database PAYMENT
33 19:50:15 > FS-10345: Verification of standalone database PAYMENT completed successfully
34 19:50:15 FS-10917: POSDB1 : Standalone resource PAYMENT was verified successfully
35 19:50:15 The clusterwide operation completed successfully, however, the server reported some warnings.
>
Versions: client = 3.3.3 server = 3.3.3 OS =
Operation: Adding resource "PAYMENT" to group "ORACLE DATABASE"
Starting Time: May 11, 2005 20:48:43
Elapsed Time: 0 minutes, 7 seconds
1 20:48:43 Starting clusterwide operation
2 20:48:44 FS-10370: Adding the resource PAYMENT to group ORACLE DATABASE
3 20:48:44 FS-10371: POSDB2 : Performing initialization processing
4 20:48:44 FS-10371: POSDB1 : Performing initialization processing
5 20:48:45 FS-10372: POSDB2 : Gathering resource owner information
6 20:48:45 FS-10372: POSDB1 : Gathering resource owner information
7 20:48:45 FS-10373: POSDB2 : Determining owner node of resource PAYMENT
8 20:48:45 FS-10374: POSDB2 : Gathering cluster information needed to perform the specified operation
9 20:48:45 FS-10374: POSDB1 : Gathering cluster information needed to perform the specified operation
10 20:48:45 FS-10375: POSDB2 : Analyzing cluster information needed to perform the specified operation
11 20:48:45 >>> FS-10652: POSDB2 has Oracle Database version 10.1.0 installed in ORADB10G_HOME1
12 20:48:45 >>> FS-10652: POSDB1 has Oracle Database version 10.1.0 installed in ORADB10G_HOME1
13 20:48:45 FS-10376: POSDB2 : Starting configuration of resource PAYMENT
14 20:48:45 FS-10378: POSDB2 : Preparing for configuration of resource PAYMENT
15 20:48:46 FS-10380: POSDB2 : Configuring virtual server information for resource PAYMENT
16 20:48:46 ** WARNING : FS-10247: The database parameter file H:\PAYMENT\admin\pfile\pfilePAYMENT.ora specified for this operation will override the parameter file value in the registry
17 20:48:46 ** WARNING : FS-10248: At registry key SOFTWARE\ORACLE\KEY_OraDb10g_home1, value of ORA_PAYMENT_PFILE is H:\PAYMENT\admin\pfile
18 20:48:46 > FS-10496: Generating the Oracle Net migration plan for PAYMENT
19 20:48:46 > FS-10490: Configuring the Oracle Net listener for PAYMENT
20 20:48:46 >> FS-10600: Oracle Net configuration file updated: F:\ORACLE\PRODUCT\10.1.0\DB_1\NETWORK\ADMIN\LISTENER.ORA
21 20:48:46 >> FS-10606: Listener configuration updated in database parameter file: H:\PAYMENT\admin\pfile\pfilePAYMENT.ora
22 20:48:47 >> FS-10605: Oracle Net listener Fslpos created
23 20:48:48 ** ERROR : FS-10066: Failed to start Windows service OracleOraDb10g_home1TNSListener for the Oracle Net listener
24 20:48:48 ** ERROR : FS-10065: Error trying to configure the Oracle Net listener
25 20:48:48 > FS-10090: Rolling back Oracle Net changes on node POSDB2
26 20:48:50 ** ERROR : FS-10784: The Oracle Database resource provider failed to configure the virtual server for resource PAYMENT
27 20:48:50 ** ERROR : FS-10890: Oracle Services for MSCS failed during the add operation
28 20:48:50 ** ERROR : FS-10497: Starting clusterwide rollback of the operation
29 20:48:50 FS-10488: POSDB2 : Starting rollback of operation
30 20:48:50 FS-10489: POSDB2 : Completed rollback of operation
31 20:48:50 ** ERROR : FS-10495: Clusterwide rollback of the operation has been completed
32 20:48:50 Please check your Windows Application log using the Event Viewer for any additional errors
33 20:48:50 The clusterwide operation failed !

umm... help? Anyone?

Ref: Multiple databases on same ASM Instance

I am having an existing two Node RAC using ASM FIle System. I want to add one more database to the existing RAC using the same ASM diskgroup. We can create multiple databases using the same ASM instance?

You need one ASM instance per server. You can have multiple instances resp databases running on that server accessing the same diskgroup made available on the server by the ASM instance.
Kind regards
Uwe Hesse
http://uhesse.wordpress.com

Listener setup when using multiple databases on same cluster

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