Unable to connect to DB using the SID

Question

HI Forum,
I am unable to connect to DB using the SID i assigned using TOAD, but i am able to connect using the instance name.
My setup needs that i should use a common name to connect to the DB immaterial of which instance is up.
Can any one instruct me how to achieve this kind of setup.
Regards
Prakash

Answer 1

Hi Prakash,
1). Create a file called TestingLoop.java containing following code:
import java.sql.*;
public class TestingLoop {
public static void main(String[] s)throws Exception {
Class.forName("oracle.jdbc.driver.OracleDriver");
/* String url="jdbc:oracle:thin:@(DESCRIPTION= (LOAD_BALANCE=on)
(ADDRESS=(PROTOCOL=TCP)(HOST=a) (PORT=1521))
(ADDRESS=(PROTOCOL=TCP)(HOST=b)(PORT=1521))
(ADDRESS=(PROTOCOL=TCP)(HOST=c) (PORT=1521))
(CONNECT_DATA=(SERVICE_NAME=orcl)))"; */
String url ="jdbc:oracle:thin:@abc.us.oracle.com:23001:xyz";
for (int i=0; i<20; i++) {
try {
long x= System.currentTimeMillis () ;
Connection conn = DriverManager.getConnection(url,"scott","tiger");
long y= System.currentTimeMillis ();
System.out.println("Connection Succesful "+conn);
System.out.println("Connection time is "+(y-x)/1000+" ms");
Statement stmt =conn.createStatement();
ResultSet res= stmt.executeQuery(" select host_name from v$instance");
while(res.next()) {
System.out.println(res.getString(1));
stmt.close();
conn.close();
catch(Exception e) {
e.printStackTrace();
2). Compile the file using this command:
javac TestingLoop.java
3). Run the java program:
java TestingLoop
Single Virtual Ip doesn't make sense... does?
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Regards,
Rodrigo Mufalani