Client Interfaces Guide > Connecting to TDV Server through ADO.NET > Adding and Configuring a Connection to TDV in Visual Studio
 
Adding and Configuring a Connection to TDV in Visual Studio
To communicate with a published TDV data service, provide the ADO.NET driver with the appropriate properties for host, port, user, password, and domain to create a connection.
To create and configure a connection
1. Open the Visual Studio Server Explorer pane by choosing the Server Explorer selection from the View menu.
2. Right-click the Data Connections node, select the option to Add Connection, and click OK.
3. Select the TDV as the data source.
If TDV is not displayed, then either the driver was not installed or Visual Studio must be restarted to recognize the driver.
4. Click Continue and enter the connection information for the selected data source.
Field
Description
Host
TDV Server host name or IP octet. Use localhost if you plan to use Visual Studio and TDV Server on the same local computer.
Port
Use the number of the JDBC or ODBC open port (default: 9401) or the SSL protected port (default: 9403). For use of SSL, Server certificates must be installed separately.
User Name
The TDV user name.
Password
The TDV password.
Domain
The TDV domain to which this data source belongs. Typically, that domain is composite for installations with locally defined users.
Datasource
Data source refers to the TDV database name published in the Data Services node.
Note: The User Name, Password, and Domain fields are not used for Kerberos or NTLM authentication because the authentication status is negotiated according to the presence of a token and communication with the Kerberos authentication server.
5. Click Test Connection to make sure that you can connect to the TDV data source.
6. Click Advanced.
7. Use the Advanced Properties panel to configure the connection, debug, and security settings.
Note: SSL security is configured using the Security Encrypt, KeyStoreFile, and KeystorePass parameters described below.
Parameter
Value description
Advanced
ConnectTimeout
The number of seconds the client waits for a connection to be established or to fail. A value of 0 disables the timeout.
FetchBytes
Maximum number of rows to fetch for a batch based on batch size, in bytes. Setting fetchBytes to a very large number can cause an Out Of Memory error in the server. The value set for fetchBytes affects the memory used on the JDBC client and the TDV server, so the value should be set based on the heap size configured.
FetchRows
The maximum number of rows fetched from TDV at one time.
Note: There is no relationship between FetchRows and FetchBytes. When the dbchannel gets a record, it calculates the number of fetched rows and fetched bytes. If the number of fetched rows is greater than fetchRows or the number of fetched bytes is greater than fetchBytes, dbchannel stops fetching rows and returns all fetched records.
RequestTimeout
The number of seconds the client waits for the TDV Server to return a request. A value of 0 disables the timeout.
SessionTimeout
Timeout for session inactivity on the server. This setting gives the TDV Server an indication of how long a session should be maintained if the connection with the client is lost without the server being notified.
SessionToken
The location of the session token used to authenticate to the sever.
Cluster
EnableReconnectOnError
Default value (false) results in an exception if the connection object dies. If you set it to true, the driver tries to create a new connection to the same server when the connection dies. When Active Clustering is in use, set this value to true, so that any failure to connect automatically initiates another attempt to connect to the server.
PingInterval
The TDV ADO.NET driver lets you configure a ping mechanism to assess TDV status after it sends a command to the server. After the driver sends a request to the server, PingInterval initiates ping verifications repeatedly at the specified interval. Verification of status by pings helps the server avoid lengthy response times for verification of connection status—for example, when the connection might have been lost just after a command was issued. PingInterval is the number of seconds between consecutive ping status checks. The default value is 0, which disables ping verification.
PingTimeoutWindow
This should be greater than or equal to the value of PingInterval. It means the ping timeout fails. From the time that common command send to the server, the driver sends continuous ping commands to the server. If the ping still fails after PingTimeoutWindow, an exception is thrown and the connection is closed. Otherwise, the driver waits and sends ping commands to the server to check the server’s status. Default value is 0, which means this option is not in use.
Connection
Properties in this section are values that were set in Adding and Configuring a Connection to TDV in Visual Studio. The values of the catalog, data source name, domain, host, port, and user are populated from the values entered on that screen, and they can be changed here.
Debug
ErrorLoggingEnabled
 
SatusInterval
 
TraceFolder
 
TraceLevel
off or on. Enables or disables debug level logging.
Pooling
ConnectionLifeTime
Setting ConnectionLifeTime=0 means each connection will be closed as soon as it is used. When using connection pool if you want to reuse the connection by putting the connection back to the connection pool set ‘connectionlifetime’ value to a value greater than zero.
The Unit for ConnectionLifeTime is second. For example ConnectionLifeTime=60000 means 60000 seconds
MaxPoolSize
Sets the maximum number of connections that are opened in the same pool at the same time. If the maximum is reached and no usable connection is available, subsequent requests are queued until a connection is available.
MinPoolSize
Sets the minimum number of connections that is maintained even if inactive to avoid the time cost of recreating new connections for a new request.
Pooling
When true, inactive connections are saved and reused as necessary.
Security
Encrypt
True or False. Used for SSL security. Set to True to enable SSL security. The default is False.
Integrated_Authentication
 
Kerberos SPN
A service principal name (SPN) used by Kerberos authentication to associate a service instance with a service logon account. This allows for service authenticate of an account even if the client does not have the account name.
KeyStoreFile
Used for SSL security. Specifies the keystore file to use for verification. The file is in the PKCS#12 format. The default keystore could be found at apps/ADO.NET/ Security/cis_ado_keystore.pfx, which includes the client certificate and private key.
KeyStorePass
Used for SSL security. Specifies the password for the KeyStoreFile. The default value is ‘changeit’.
User_Tokens
 
ValidateRemoteCert
True or False. The default is False.
ValidateRemoteHostname
True or False. The default is False.
8. Click OK twice to finish the configuration.
After defining the Connection profile settings, the newly created connection to the TDV data source is displayed in the Visual Studio Server Explorer. You can work with the TDV data source using the standard Server Explorer interface.