Lesson 6: Start the server and client

In this lesson, you start the MobiLink server and remote database.

Previously, you modified the download cursor script to download information related to one salesperson. In this lesson, you specify the salesperson by setting the remote ID to the salesperson identifier.

Start the MobiLink server

By default, MobiLink uses the snapshot/READ COMMITTED isolation level for upload and download. For the MobiLink server to make the most effective use of snapshot isolation, the Oracle account used by the MobiLink server must have access to the GV_$TRANSACTION Oracle system view. If access is not given, a warning is issued and rows may be missed on download.

To grant access to the OE user

Connect as the SYS user with SYSDBA privileges using the Oracle SQL Plus application. At a command prompt, run the following command:
sqlplus SYS/your password for sys as SYSDBA
To grant access to the GV_$TRANSACTION Oracle system view, run the following command:
GRANT SELECT ON SYS.GV_$TRANSACTION TO OE;
To grant access to the V_$SESSION Oracle system view, run the following command:
GRANT SELECT ON SYS.V_$SESSION TO OE;

To start the MobiLink server

At a command prompt, navigate to the directory where you created the synchronization model. (This is the root directory you chose in the first step of the Create Synchronization Model Wizard.)

If you used the suggested directory names, you should have the following directories located in the root directory: sync_oracle\mlsrv.
Run the following command from the mlsrv directory:
sync_oracle_mlsrv.bat "DSN=oracle_cons;UID=OE;PWD=sql;"
- sync_oracle_mlsrv.bat is the command file created to start the MobiLink server.
- DSN is your ODBC data source name.
- UID is the user name you use to connect to the consolidated database.
- PWD is the password you use to connect to the consolidated database.
When this command runs successfully, the message MobiLink server Started appears in the MobiLink server messages window.

If the MobiLink server fails to start, check your connection information for your consolidated database.

To start the remote database

At a command prompt, navigate to the directory where the Deploy Synchronization Model Wizard created your remote database.

If you used the suggested directory names, you should have the following directories located in the root directory: sync_oracle\remote.
Start your remote SQL Anywhere database with the following command:
dbeng12 -n remote_eng sync_oracle_remote.db -n remote_db
- dbeng12 is the database server used to start the SQL Anywhere database.
- remote_eng is the database server name.
- sync_oracle_remote.db is the database file that is started on remote_eng.
- remote_db is the name of the database on remote_eng.

When this command runs successfully, a SQL Anywhere database server named remote_eng starts and loads the database called remote_db.

Set the remote ID

In the remote schema, each remote database represents one salesperson. The synchronization scripts you wrote included logic that instructed the MobiLink server to download a subset of data based on the remote ID of the remote database. You must set the database's remote ID to the value of a valid salesperson identifier.

It is important to complete this step before the first synchronization because when the remote device synchronizes for the first time, it downloads all information related to the chosen salesperson.

To set the remote ID to a valid salesperson identifier

Choose a valid salesperson identifier:

Connect as the SYS user with SYSDBA privileges using the Oracle SQL Plus application. At a command prompt, run the following command:

sqlplus SYS/your password for sys as SYSDBA

To view a list of valid salesperson identifiers in the ORDERS table, execute the following statement:

SELECT COUNT( SALES_REP_ID ), SALES_REP_ID
FROM OE.ORDERS GROUP BY SALES_REP_ID;

In this example, the remote database represents a salesperson with a SALES_REP_ID of 154.

To exit Oracle, run the following command:
exit

To set the database's remote id to a value of 154, run the following command:

dbisql 
-c "server=remote_eng;DBN=remote_db;UID=DBA;PWD=sql"
"SET OPTION PUBLIC.ml_remote_id='154'"

dbisql is the application used to execute SQL commands against a SQL Anywhere database.
ENG specifies the database server name remote_eng.
DBN specifies the database name to remote_db.
UID is the user name used to connect to your remote database.
PWD is the password used to connect to your remote database.
SET OPTION PUBLIC.ml_remote_id='154' is the SQL command used to set the remote ID to a value of 154.