Access DBF Tables 2GB – Visual FoxPro with Advantage Database Server

Published by Jacob Martin on July 24, 2015

DBF tables over 2GB is accessed by the Visual FoxPro application which is frequently challenged by the constraint. Numerous VFP applications have been running for the years and through that time the data amount has grown for testing the 2GB limit. For the 2GB limit developers are forced to plan for finding the creative ways, including archiving data and splitting one table into many tables.

Through Advantage Database Server (ADS) user could be able to access tables over 2GB for tye reason ADS natively supports the DBF/CDX format.

How it works?

During allowing the table for growing beyond the 2GB limit of the limit of the FoxPro driver DBF file format was being preserved Advantage. It is done by using 64-bit unsigned integer for calculating the file offsets, as VFP uses a 32-bit signed integer. Since while using the larger value to track the file offsets permit Advantage to access DBF files exceeding 2GB in size. Yet the native VFP driver after some time will not identify the particular file as a valid table.

At the time of using Advantage the size of the file is restricted by the operating system and existing disk space. While using the most recent file systems (i.e. NTFS, NSS) the limited file size is in Exabyte’s (1EB = 1 billion GB). The more practical limitation is on several records that could be stored in the table. This is presently restricted to 2 billion records thus the utmost size of user’s table would be 2 billion times more of the users recorded size.

Typical Visual FoxPro Local Data Access

Accessing a Table >2GB with Advantage

What data access options are offered?

A wide range of data access methods for several different environments Advantage is having. FoxPro developers must use the Advantage ODBC driver or OLE DB Provider. And another presented client contains .NET, CA-Clipper, CA Visual Objects, PHP, Java, Delphi and Perl.

It also contains a free Local Server (ALS) that could be fixed royalty free with the application and have several features includes in the full Advantage Database Sever client/ server product. It is having the power, reliability, stability, features and ease of implementation of Advantage, which ones want to integrate it into your VFP application. With the full client/server product, advantage Database Server, one will quickly receive benefits like encryption, hiding data from the users, replication, hot backup, concurrent data access with different technologies to keep on growing and extending particular application and others.

Professional Recommended Software

The DBF File Repair Tool is very professional, powerful and effective software as it can easily recover the corrupt database file without damaging the data. You can install dbf repair tool in order to recover your database file easily, if you are unable to access the database file then you can install dbf repair tool and recover your database file easily. It also helps to fix DBF files error. This tool can also recover all components that included in a dbf file like data types, table name, and column name of all columns, Binary indexes, regular key, foreign key, unique key, Indexes, primary key, and candidate key.

Steps to use DBF File Repair Tool:

Step 1: Download, Install and Run DBF File Repair software.

Step 2: Then you need to select database application and database file to repair and then click on the ‘Start Scan’ button to start the scanning process.

Step 3: Then scanning process is in progress, if you want to stop it then click on ‘Stop’ button.

Step 4: Then you need to select the destination path by clicking brows button from dialogue box. And press ‘OK’ button.

Step 5: Then you need to select the database by clicking ‘Brows’ button in which you want to save the recovered data of DBF file. And click on ‘Finish’ button.

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