Download DB2 for Z/OS and Os/390: Ready for Java by IBM Redbooks, Bart Steegmans PDF

By IBM Redbooks, Bart Steegmans

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Type 1 This is the oldest type of driver. It was provided by Sun to promote JDBC when no database-specific drivers were available. With this driver, the JDBC API calls an ODBC driver to access the database. This driver type is commonly referred to as a JDBC-ODBC bridge driver. Its shortcoming is that ODBC must be implemented and installed on all clients using this driver type. This restricts it to platforms that have ODBC support, and as such is mostly Windows centric. As it also has to translate every JDBC call into an equivalent ODBC call, the performance of a Type 1 driver is not all that great.

Figure 3-3. Local T2 connection 34 Part 1: Introduction Part 1: Introduction 35 As the application is local to the DBMS, and we use a Type 2 driver that can do 'native' calls to DB2; this configuration normally provides the best performance. You also use this configuration when running your WebSphere Application Server (WAS) on z/OS. Your Java application can run under the control of WAS, and talks to DB2 through the Type 2 JDBC driver, and a local RRS attachment. 2 Using the Type 4 driver to talk to a local DB2 for z/OS and OS/390 In this configuration (Figure 3-4 on page 31) we use a Type 4 driver to connect to a local DB2 for z/OS and OS/390 subsystem through DRDA and DDF.

It supports Type 2 and Type 4 connectivity to DB2 Version 8 for Windows, AIX 32-bit and 64-bit, Solaris 32-bit and 64-bit, Linux IA-32 and z31-bit and HP 32-bit and 64-bit. The Type 4 driver has been available since V8 went generally available. 2). Using the Type 4 driver you cannot only access DB2 for LUW systems. 1 FixPak 1 and later 32 Part 1: Introduction Part 1: Introduction 33 Ultimately, the Universal Driver will also be released with Type 2 and Type 4 connectivity to DB2 for z/OS and OS/390.

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