This chapter describes tasks you must perform to configure the DRDA server. Each supported operating system is addressed separately. Experience with the given operating system and database is required.
The steps for configuring your remote DRDA server apply to the following DRDA servers:
DB2 UDB for z/OS
DB2 UDB for iSeries
DB2 UDB for Linux, UNIX, and Windows
Configuring a DRDA database to enable access by the gateway requires actions on the DRDA database and on certain components of the host operating system. Although no Oracle software is installed on the host system, access to, and some knowledge of the host system and DRDA database are required during the configuration. Refer to the vendor documentation for complete information about your host system and DRDA database.
This chapter contains the following sections:
Perform the following tasks to configure the DRDA server with DB2 on a z/OS system:
Define the user ID that owns the package
During first gateway usage for a particular DRDA server, an Oracle supplied package will be automatically bound to the DRDA server. The user ID and password that are used (either implied as the current Oracle user or explicitly defined in the CREATE DATABASE LINK command) must have proper authority on the DRDA Server to create the package. The followings are minimum authorities needed by this user:
Package privileges of BIND, COPY, and EXECUTE, for example:
GRANT BIND ON PACKAGE oraclegtw.* TO userid GRANT COPY ON PACKAGE oraclegtw.* TO userid GRANT EXECUTE ON PACKAGE oraclegtw.* TO PUBLIC
Collection privilege of CREATE IN, for example:
GRANT CREATE IN COLLECTION oraclegtw TO USER userid
System privileges of BINDADD and BINDAGENT, for example:
GRANT BINDADD TO USER userid GRANT BINDAGENT TO USER userid
Database privilege of CREATETAB, for example:
GRANT CREATETAB ON DATABASE database TO USER userid
Choose a user ID that will own the package and the HS_TRANSACTION_LOG table. Ensure that this user ID is defined to both DB2 and OS/390 (MVS).
Define the recovery user ID
During gateway configuration, the recovery user ID and password are specified in the gateway initialization file using the HS_FDS_RECOVERY_ACCOUNT and HS_FDS_RECOVERY_PWD parameters. If a distributed transaction fails, then the recovery process connects to the remote database using the user ID and password that are defined in these parameters. This user ID must have execute privileges on the package and must be defined in the DRDA database. If the user ID is not specified in HS_FDS_RECOVERY_ACCOUNT, then the gateway attempts to connect to a user ID of RECOVER when a distributed transaction is in doubt.
Determine the user ID and password that you will use for recovery.
Determine DRDA location name for DB2 instance
The DRDA location name is required as a gateway parameter. To determine the location name, run the following SQL query from a DB2 SPUFI session:
SELECT CURRENT SERVER FROM any_table
where any_table is a valid table with one or more rows.
If the value returned by this query is blank or null, then the DRDA location name has not been established. Contact the system administrator to arrange to set a location name for the instance.
Configure DB2 Distributed Data Facility for Gateway
DB2 Distributed Data Facility (DDF) is the component of DB2 that manages all distributed database operations, both DRDA and non-DRDA.
If your site uses DB2 distributed operations, then DDF is probably operational on the DB2 instance that you plan to access through the gateway. If DDF is not operational, then you must configure it and start it as described in the appropriate DB2 documentation.
Even if DDF is operational on the DB2 instance, it might be necessary to make changes to the DDF Communication Database (CDB) tables to specify the authorization conduct of DRDA sessions from the gateway. Properly authorized users can do this with a utility such as the DB2 SPUFI utility. If you make changes to CDB tables, then you must stop and restart DDF for the changes to take effect. Refer to Chapter 15, "Security Considerations", for additional CDB tables and security information.
Experience with DB2 UDB for iSeries and AS/400 is required to perform the following steps:
Define the user ID that owns the package
During gateway configuration, you will need to run the Bind Package Stored Procedure to bind the gateway package on the DRDA Server. To properly bind the package, the user ID and password that are used when the procedure is run (either implied as the current Oracle user or explicitly defined in the CREATE DATABASE LINK command) must have proper authority on the DRDA Server to create the package. This user ID should be used to create and own the HS_TRANSACTION_LOG table. The user ID that is used to bind or rebind the DRDA package must have the following privileges on the DRDA Server:
Use authority on the CRTSQLPKG command
Change authority on the library in which the package will be created
Choose a user ID now that will own the package and the HS_TRANSACTION_LOG table. Ensure that this user ID is defined in DB2 UDB for iSeries and AS/400.
Define the recovery user ID
During gateway configuration, the recovery user ID and password are specified in the gateway initialization file using the HS_FDS_RECOVERY_ACCOUNT and HS_FDS_RECOVERY_PWD parameters. If a distributed transaction fails, then the recovery process connects to the remote database using the user ID and password that are defined in these parameters. This user ID must have execute privileges on the package and must be defined to the DRDA database. If the user ID is not specified in HS_FDS_RECOVERY_ACCOUNT, then the gateway attempts to connect to a user ID of RECOVER when a distributed transaction is in doubt.
Determine the user ID and password that you will use for recovery.
Determine DRDA location name for DB2 UDB for iSeries instance
The DRDA location name is required as a gateway parameter. To determine the location name, run the following SQL query from a STRSQL session. If SQL is unavailable on the system, then use the AS/400 command DSPRDBDIRE to identify your LOCAL DRDA Server.
SELECT CURRENT SERVER FROM any_table
where any_table is a valid table with one or more rows.
If the value returned by this query is blank or null, then the DRDA location name has not been established. Contact the system administrator to arrange to set a location name for the instance.
Experience with DB2/UDB, configuring the communication subsystem of DB2 UDB for Linux, UNIX, and Windows, and the host System Administration tools is required to perform the following steps.
Define the user ID that owns the package
During first gateway usage for a particular DRDA server, an Oracle supplied package will be automatically bound to the DRDA server. The user ID and password that are used (either implied as the current Oracle user or explicitly defined in the CREATE DATABASE LINK command) must have proper authority on the DRDA Server to create the package. The followings are minimum authorities needed by this user:
Package privileges of BIND and EXECUTE, for example:
GRANT BIND ON PACKAGE oraclegtw.* TO userid
GRANT EXECUTE ON PACKAGE oraclegtw.* TO PUBLIC
Schema privilege of CREATEIN, for example:
GRANT CREATEIN ON SCHEMA otgdb2 TO USER userid GRANT CREATEIN ON SCHEMA oraclegtw TO USER userid
Database authorities of CONNECT, BINDADD, and CREATETAB, for example:
GRANT CONNECT ON DATABASE TO USER userid GRANT BINDADD ON DATABASE TO USER userid GRANT CREATETAB ON DATABASE TO USER userid
Choose a user ID that will own the package and HS_TRANSACTION_LOG table. Ensure that this user ID is defined in both the DB2 instance ID and the operating system.
Define the recovery user ID
During gateway configuration, the recovery user ID and password are specified in the gateway initialization file using the HS_FDS_RECOVERY_ACCOUNT and HS_FDS_RECOVERY_PWD parameters. If a distributed transaction fails, then the recovery process connects to the remote database using the user ID and password that are defined in these parameters. This user ID must have execute privileges on the package and must be defined to the DRDA database. If the user ID is not specified in HS_FDS_RECOVERY_ACCOUNT, then the gateway attempts to connect to a user ID of RECOVER when a distributed transaction is in doubt.
Determine the user ID and password that you will use for recovery.
Determine DRDA location name for DB2 UDB for Linux, UNIX, and Windows instance
The DRDA location name is required as a gateway parameter. To determine the location name, run the following SQL query from a DB2 CLI session:
SELECT CURRENT SERVER FROM any_table
where any_table is a valid table with one or more rows.
If the value returned by this query is blank or null, then the DRDA location name has not been established. Contact your system administrator to set a location name for the instance.
The gateway uses several DB2 packages, which it normally uploads and binds during the first time the gateway connects to a DB2 instance. In some customer environments, the connecting userid may not have the necessary privileges to perform the binding, or some customers may prefer to manually bind the packages rather than allow the gateway to do the binding.
In such cases, Oracle provides a predefined set of packages for manual binding. These packages come with several restrictions that must be observed by setting specific gateway initialization parameters to set values otherwise, the gateway will attempt to rebind the package automatically.
This section contains the following sub-sections:
Perform the following steps to manually bind packages for DB2 UDB for z/OS:
Allocate a sequential dataset on z/OS using the parameters DSORG=PS, RECFM=FB, LRECL=80, and BLKSIZE=3120. For example,
userid.DBRMFILE.XMIT
Allocate a Partitioned DataSet using the parameters DSORG=PO, RECFM=FB, LRECL=80, and BLKSIZE=6160. for example,
userid.TG4DRDA.CNTL
FTP the following file to the previously allocated sequential dataset in BINARY mode:
ORACLE_HOME\dg4db2\admin\dg4db2_zos_dbrm.xmit
Use the PUT command to replace the sequential dataset contents.
FTP the following file to the previously allocated PDS in ASCII mode:
ORACLE_HOME\dg4db2\admin\dg4db2_zos_bind.jcl
Use the PUT command to place the file into the PDS as member name BIND.
Use the TSO command option of ISPF (option 6) to issue the RECEIVE command:
RECEIVE INDS('userid.DBRMFILE.XMIT')
Specify DA(userid.DDODBC.DBRMLIB) as the parameters to the RECEIVE command. This will unpack the xmit file and create the specified PDS name.
Edit the BIND JCL (userid.TG4DRDA.CNTL(BIND))and follow the instructions to update the JCL. Once updated, submit the JCL to perform the actual binding of the packages and granting of execution privileges on the packages.
To use these packages with the gateway, please set the following init parameters in the gateway initialization file:
HS_OPEN_CURSORS=200
HS_FDS_PACKAGE_COLLID=NULLID
Perform the following steps to manually bind packages for DB2 UDB for Linux, Unix, and Windows:
Copy the following files to the host running the DB2 instance from the ORACLE_HOME\dg4db2\admin directoy:
DDOC510A.bnd DDOC510B.bnd DDOC510C.bnd DDON510A.bnd DDON510B.bnd DDON510C.bnd DDOR510A.bnd DDOR510B.bnd DDOR510C.bnd DDOS510A.bnd DDOS510B.bnd DDOS510C.bnd DDOU510A.bnd DDOU510B.bnd DDOU510C.bnd dg4db2_luw_pkglist.lst
If copying via FTP, then files ending in .bnd should be transfered in BINARY mode and files ending in .lst should be transfered in ASCII mode.
Connect to the DB2 instance and issue the bind command. For example,
db2 'connect to <database_name> user <userid> using <password>' db2 'bind @dg4db2_luw_pkglist.lst grant public'
To use these packages with the gateway, set the following initialization parameters in the gateway initialization file:
HS_OPEN_CURSORS=200
HS_FDS_PACKAGE_COLLID=NULLID