Oracle creates multiple dblinks to access multiple sqlserver databases through the gateway

The basis of this blog post operation is that a separate dblink has been created through the gateway to access the sqlserver database.

Specific operations can be viewed by opening the following link:

https://blog.csdn.net/qq_37823979/article/details/106207903
 

Configure the dblink that creates multiple sqlserver data sources based on the above.

The next demonstration is to configure two more data sources.

First enter the  ORACLE_HOME\dg4msql\admin folder,

Copy the dg4msql file in two copies and name them  initdg4msql2.ora and initdg4msql3.ora

Then go in to modify the ip address and database name port number,

initdg4msql.ora:   HS_FDS_CONNECT_INFO=IP address: 143//MSSQLSERVER/dataportal

initdg4msql2.ora: HS_FDS_CONNECT_INFO=IP address:1433//MSSQLSERVER/QZGX_QX_2018

initdg4msql3.ora: HS_FDS_CONNECT_INFO=IP address: 143//MSSQLSERVER/QZGX_QX

 

Then go to configure oracle monitoring

Go to the ORACLE_HOME\network\admin directory

Modify the listener.ora file

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = CLRExtProc)
      (ORACLE_HOME = E:\app\Administrator\product\12.2.0\dbhome_1)
      (PROGRAM = extproc)
      (ENVS = "EXTPROC_DLLS=ONLY:E:\app\Administrator\product\12.2.0\dbhome_1\bin\oraclr12.dll")
    )

   (SID_DESC=
         (SID_NAME=dg4msql)
         (ORACLE_HOME=E:\app\Administrator\product\12.2.0\dbhome_1)
         (PROGRAM=dg4msql)
      )
   (SID_DESC=
         (SID_NAME=dg4msql2)
         (ORACLE_HOME=E:\app\Administrator\product\12.2.0\dbhome_1)
         (PROGRAM=dg4msql)
      )
   (SID_DESC=
         (SID_NAME=dg4msql3)
         (ORACLE_HOME=E:\app\Administrator\product\12.2.0\dbhome_1)
         (PROGRAM=dg4msql)
      )
  )

 

Two new monitoring instances are added on the original basis.

Then open the tnsnames.ora file and add the following content to the tnsnames.ora file.

dg4msql2  =
  (DESCRIPTION=
    (ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1521))
    (CONNECT_DATA=(SID=dg4msql2))
    (HS=OK)
  ) 
dg4msql3  =
  (DESCRIPTION=
    (ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1521))
    (CONNECT_DATA=(SID=dg4msql3))
    (HS=OK)
  ) 

 

At this point, the configuration is complete, and then restart the monitor. There are several ways to restart the monitor.

The simplest is win+r-->cmd-->lsnrctl stop -->lsnrctl start -->lsnrctl status

After execution, there will be two newly configured instances of dg4msql2 and dg4msql3.

Then create dblink by command

create PUBLIC database link TOQZGX_QX_2018 connect to "sa" identified by "111111"  using 'dg4msql' ;

SELECT * FROM gs_etps_info@TOQZGX_QX_2018;

So far, the multi-data source dblink has been created.