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Oracle VM - Version 3.2.7 to 3.2.7 Release OVM32 Oracle Cloud Infrastructure - Version N/A and later Information in this document applies to any platform. This document describes how to increase the network performance which is very slow while writing from Windows guest with PV drivers running on Oracle VM. Oracle Technology Network License Agreement. Oracle is willing to authorize Your access to software associated with this License Agreement (“Agreement”) only upon the condition that You accept that this Agreement governs Your use of the software.
ODBC and Network Performance
The Open Database Connectivity (ODBC) product was initially developed by Microsoft as a generic database driver. Its architecture has now been generalized and many different vendors are offering open database connectivity products that are based on ODBC. ODBC consists of more than 50 functions that are invoked from an application using a call-level API. The ODBC API does not communicate with a database directly. Instead, it serves as a link between the application and a generic interface routine. The interface routine, in turn, communicates with the database drivers via a Service Provider Interface (SPI).
ODBC has become popular with database vendors such as Oracle, and Oracle is creating new ODBC drivers that will allow ODBC to be used as a gateway into their database products. Essentially, ODBC serves as the ?traffic cop? for all data within the client/server system. When a client requests a service from a database, ODBC receives the request and manages the connection to the target database. ODBC manages all of the database drivers, checking all of the status information as it arrives from the database drivers.
It is noteworthy that the database drivers should be able to handle more than just SQL. Many databases have a native API that requires ODBC to map the request into a library of functions. An example would be a SQL Server driver that maps ODBC functions to database library function calls. Databases without a native API (i.e., non-SQL databases) can also be used with ODBC, but they go through a much greater transformation than the native API calls.
Database connectivity using ODBC has a high amount of overhead in many Oracle applications. The inherent flexibility of ODBC means that the connection process to Oracle is not as efficient as a native API call to the database. Most companies that experience ODBC-related performance problems will abandon ODBC and replace it with a native communications tool such as the Oracle Call Interface (OCI). In sum, ODBC is great for ad hoc database queries from MS Windows, but it is too slow for most production applications. Now let?s turn our attention to Oracle replication and see how the replication parameters can affect Oracle performance.
While network tuning is very complex, let?s take a brief overview of the standard tools that are used in a UNIX environment to monitor network transmissions.
This feature will be removed in a future version of Windows. Avoid using this feature in new development work, and plan to modify applications that currently use this feature. Instead, use the ODBC driver provided by Oracle.
The Microsoft® ODBC Driver for Oracle allows you to connect your ODBC-compliant application to an Oracle database. The ODBC Driver for Oracle conforms to the Open Database Connectivity (ODBC) specification described in the ODBC Programmer's Reference. It allows access to PL/SQL packages, XA/DTC integration, and Oracle access from within Internet Information Services (IIS).
Oracle RDBMS is a multiuser relational database management system that runs with various workstation and minicomputer operating systems. IBM-compatible computers running Microsoft Windows can communicate with Oracle database servers over a network. Supported networks include Microsoft LAN Manager, NetWare, VINES, DECnet, and any network that supports TCP/IP.
The ODBC Driver for Oracle enables an application to access data in an Oracle database through the ODBC interface. The driver can access local Oracle databases or it can communicate with the network through SQL*Net. The following diagram details this application and driver architecture.
The ODBC Driver for Oracle complies with API Conformance Level 1 and SQL Conformance Level Core. It also supports some functions in API Conformance Level 2 and most of the grammar in the Core and Extended SQL conformance levels. The driver is ODBC 2.5 compliant and supports 32-bit systems. Oracle 7.3x is supported fully; Oracle8 has limited support. The ODBC Driver for Oracle does not support any of the new Oracle8 data types - Unicode data types, BLOBs, CLOBs, and so on - nor does it support Oracle's new Relational Object Model. For more information about supported data types, see Supported Data Types in this guide.
To access Oracle data, the following components are required:
The ODBC Driver for Oracle
An Oracle RDBMS database
Oracle Client Software
Additionally, for remote connections:
- A network that connects the computers that run the driver and the database. The network must support SQL*Net connections.
This guide contains detailed information about setting up and configuring the Microsoft ODBC Driver for Oracle and adding programmatic functionality. It also contains technical reference material.
For information regarding specific Oracle product behavior, consult the documentation that accompanies the Oracle product.
Drivers Oracle Network & Wireless Cards Login
For information about setting up or configuring the Microsoft ODBC Driver for Oracle using the ODBC Data Source Administrator, see the ODBC Data Source Administrator documentation.
Drivers Oracle Network & Wireless Cards Compatible
This section contains the following topics.