Web site: 21cs.com/products/vsen
Origin: USA
Category: Server
Desktop environment: CLI
Architecture: IBM Z
Based on: DOS/360
Wikipedia: VSE
Media: Install
The last version | Released: active
VSEn (Virtual Storage Extended, previously: z/VSE) – an operating system for IBM mainframe computers.
Its development primarily took place in Böblingen, Germany, at IBM Deutschland Research & Development GmbH. It is not as widespread as z/OS and is mostly used on smaller systems. z/VSE is the successor to VSE/ESA, VSE/SP, DOS/VSE, DOS/VS, and DOS/360. The roots of z/VSE thus lie in the 1960s and the System/360.
VSEn 6.4 features:
– IBM z17 Support
– Fast System Upgrades
– Smarter License Management
– REST APIs for Batch
– Cloud-Native Connectors
– Modern Crypto Ciphers
In 2021, 21st Century Software Inc. acquired the code from IBM and distributes it as the successor to z/VSE under the new name VSEn.
The latest release, 6.2, of the IBM Z operating system was available from December 1, 2017, but reached end of service on September 30, 2023.
z/VSE version 5.1 introduced support for 64-bit virtual addressing. z/VSE version 5.2 was announced on April 7 and became available on April 25, 2014.
z/VSE originally supported only 24-bit addressing. As the underlying hardware evolved, z/VSE also introduced support for 31-bit addressing. IBM released z/VSE version 4 in March 2007. z/VSE version 4 supports the z/Architecture and thus 64-bit real addressing.
IBM continues to recommend that customers run Linux-on-System z on the same system as z/VSE. This 64-bit Linux system can extend z/VSE applications and access z/VSE applications and data via HiperSockets. Furthermore, a variety of middleware products can be used on Linux-on-System z.
The interface for batch processes is JCL (Job Control Language). There is also an interface for z/VSE console operators. CICS is one of the most widely used transaction monitors and is very common among z/VSE customers. CICS now also supports the latest innovations, such as web services. A new version of CICS was introduced with z/VSE version 6.1. DB2 is also available for z/VSE.
Like z/OS, z/VSE supports traditional 3270 terminals as a user interface. However, most customers have now begun to access their applications via web browsers. For historical reasons, the TCP/IP implementation is a separate, paid product and is offered in two different versions by two software vendors. Most customers now use TCP/IP.
The z/VSE operating system celebrated its 50th anniversary in October 2015. With z/VSE 4.1, IBM introduced 64-bit real addressing. Version 3.1, discontinued in mid-2009, was the last version compatible with 31-bit mainframes; subsequent versions from 4.1 onward require a 64-bit mainframe server.
Source: Wikipedia; License: Creative Commons Attribution-ShareAlike 4.0.
