The IBM iSeries AS400, also known simply as AS400, is one of the most reliable and long-standing computing platforms in the business world. First introduced by IBM in 1988, this system has stood the test of time due to its robustness, versatility, and ability to support complex business applications. However, for those who are new to the system or are considering its adoption, understanding what makes IBM iSeries AS400 unique is crucial. This comprehensive overview delves into its defining features, benefits, and why it remains an integral part of many businesses today.

What is IBM iSeries AS400?

IBM iSeries AS400 is a family of mid-range servers designed to run enterprise applications. Initially launched as the AS/400, it has evolved over the years into the IBM Power Systems line, running on the IBM i operating system. While the AS400’s hardware has undergone multiple upgrades, the underlying system continues to be the same, focusing on delivering reliable, secure, and efficient processing for businesses of all sizes.

The iSeries is known for its highly integrated system, meaning that the hardware, operating system, and database are tightly coupled. This unique integration is one of the key factors that makes IBM iSeries AS400 stand out in the world of enterprise computing.

Key Features that Define IBM iSeries AS400

1. Integrated Architecture

One of the most distinguishing features of IBM iSeries AS400 is its integrated architecture. Unlike other systems that require separate components for the operating system, database management, and middleware, AS400 combines these into a single platform. This means businesses do not need to worry about compatibility between various components, which results in reduced complexity and easier management.

The operating system, IBM i, includes an integrated database known as DB2, which makes it ideal for transactional applications. This integration allows businesses to run mission-critical workloads more efficiently and with greater reliability.

2. Reliability and Availability

IBM iSeries AS400 is renowned for its reliability and availability. Many businesses rely on AS400 systems to run critical applications, and this server’s design focuses on ensuring that operations continue smoothly, even in the face of hardware failures. The system is equipped with high levels of fault tolerance and disaster recovery features, such as automatic data recovery and high-availability configurations.

Its reliability makes it an excellent choice for industries like banking, manufacturing, and retail, where downtime can have significant financial and operational impacts. The system is built to support continuous uptime, which is one of the key reasons why it remains the backbone of many large enterprises.

3. Security

Another unique aspect of IBM iSeries AS400 is its security features. IBM i is designed with a built-in security model that includes object-level security, data encryption, and user access controls. This security model ensures that only authorized users can access specific data and applications, making the system highly secure for sensitive business information.

The AS400 platform’s security architecture is a key advantage for businesses in regulated industries, such as finance and healthcare, where strict compliance requirements are necessary. The IBM i operating system also integrates with modern authentication and encryption protocols, ensuring that the system remains secure even as new security threats emerge.

4. Backward Compatibility

One of the challenges in the world of enterprise computing is maintaining compatibility between old and new systems. IBM iSeries AS400 stands out due to its commitment to backward compatibility. This means that applications written for older versions of AS400 will continue to run on newer systems without the need for modification.

This feature is particularly valuable for organizations that have invested in legacy applications. Rather than having to rewrite or replace their applications, businesses can continue using their trusted programs while taking advantage of newer hardware and software upgrades. This extends the life of AS400-based applications, making them a cost-effective solution for long-term IT strategies.

5. Scalability and Flexibility

IBM iSeries AS400 is designed to scale according to the needs of the business. Whether you are running a small-scale operation or a large enterprise, the AS400 can accommodate your requirements. The system’s ability to handle large volumes of data and users simultaneously makes it a popular choice for organizations experiencing growth or those with fluctuating resource demands.

Furthermore, businesses can easily scale their AS400 system vertically (by adding more processing power or memory) or horizontally (by adding more servers or partitions). This scalability ensures that the system remains effective, regardless of the size of the organization or the complexity of the applications.

6. Support for Multiple Programming Languages

IBM iSeries AS400 supports a wide variety of programming languages, making it versatile for developers with different expertise. It natively supports languages like RPG (Report Program Generator), CL (Control Language), and COBOL, which have been used for decades in business applications. Additionally, it supports modern programming languages like Java, PHP, and Python, providing flexibility for developers who want to create more contemporary applications.

This multi-language support allows organizations to continue using legacy applications while also enabling new development efforts in more modern languages. For businesses looking to update their infrastructure while maintaining operational continuity, this compatibility is a significant advantage.

7. Cost-Effectiveness

While the initial cost of setting up an IBM iSeries AS400 system may seem high, it can be very cost-effective in the long run. The integrated design reduces the need for additional hardware and software, resulting in lower maintenance costs. Additionally, the system’s reliability and longevity mean that businesses can avoid frequent upgrades, which is a common issue with other systems.

The system's scalability allows organizations to manage their resources more efficiently, ensuring that they only pay for the capacity they need. As a result, the overall total cost of ownership for IBM iSeries AS400 can be lower than for other enterprise systems, especially over extended periods.

Why IBM iSeries AS400 is Still Relevant Today

Despite its age, IBM iSeries AS400 remains relevant today for several reasons:

• Legacy Systems: Many organizations have built their entire IT infrastructure around the AS400 platform, and migrating to a new system would require significant time, resources, and cost. For these businesses, maintaining the AS400 system is often the most practical option.
• Business Continuity: The stability, security, and reliability of AS400 systems make them ideal for industries where business continuity is critical. These industries continue to rely on AS400 because of its proven track record in supporting critical workloads.
• Integration with Modern Technologies: IBM has continued to update the AS400’s operating system and hardware, allowing it to integrate with modern technologies such as cloud computing, data analytics, and AI. This makes AS400 a more adaptable solution in the digital age.

The Role of IBM iSeries AS400 Consulting Services

For organizations looking to optimize or migrate their IBM iSeries AS400 systems, IBM iSeries AS400 Consulting Services can provide valuable expertise. These consultants specialize in helping businesses with system upgrades, application modernization, and cloud migration while ensuring that critical business processes continue to run smoothly.

Consulting services can assist in addressing technical challenges, performing system evaluations, and implementing best practices for managing and maintaining IBM iSeries AS400 systems. Whether you're looking to enhance security, improve system performance, or ensure compliance with industry regulations, IBM iSeries AS400 Consulting Services can provide tailored solutions for your needs.

Conclusion

IBM iSeries AS400 is a unique and highly reliable computing platform that has served businesses for decades. Its integrated architecture, security features, scalability, and backward compatibility make it a valuable asset for many organizations. While some may view it as an outdated system, its continued relevance in industries that demand high levels of reliability and security proves that the AS400 remains a vital component of the enterprise IT landscape. Whether you are new to the system or looking to optimize your current infrastructure, understanding the unique features of IBM iSeries AS400 is crucial for making informed decisions about your IT strategy. IBM iSeries AS400 Consulting Services can play a pivotal role in ensuring that your system is running efficiently and effectively, helping your business achieve long-term success.