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100% Portable, Compact ISAM File System

Veryant JISAM is a 100% Java-based indexed sequential access (ISAM) file system that runs on a wide range of platforms, from mainframes to handheld mobile devices. Now your business can deliver fast and efficient access to COBOL applications with ISAM data files anywhere Java technology runs, without the overhead of a relational database or investing in complex program change.


· Written entirely in Java, so it runs anywhere the Java Runtime Environment (JRE) is supported, even on mobile devices
· Includes the JUTIL utility for basic file management tasks
· Supports multi-language deployments
· Includes the ISMIGRATE utility for one-step migration of data files from other data sources
· Offered with the isCOBOL Runtime Environment at no extra fee

Anytime, anywhere data access

Veryant JISAM openes up existing and new COBOL programs with ISAM files to a variety of deployment platforms. Using a B+ tree-index architecture, Veryant JISAM offers fast, self-balancing, and flexible data retrieval.
With Veryant JISAM you can:
  • Index a file with any number of indexes, each of which may include up to 16 non-contiguous segments.
  • Sort any part of an index in ascending or descending order.
  • Use both unique keys and duplicate keys.
  • Simplify multi-language distributions and location leveraging Unicode support.
The JUTIL utility is included with Veryant JISAM for basic file management. With JUTIL, developers can load and unload binary or line sequential files, compact files, check file consistency and rebuild Veryant JISAM files.

Technical characteristics

Key technical characteristics of Veryant JISAM include:
  • Maximum file size: 9+ exabytes (over 9M terabytes)
  • Maximum number of keys: no limit
  • Maximum number of records: no limit
  • Maximum key length: 256 bytes
  • Maximum number of segments per key: 16
  • Maximum record length: 2 GB

Learn more

» Download the Veryant JISAM datasheet
» Take a short Quick Fit Assessment to determine whether or not Veryant technology is a good business fit for your organization
» Contact Veryant to arrange a complimentary code analysis or learn more about isCOBOL software

Learn More
  isCOBOL Overview
  Getting Started

isCOBOL acts as a bridge between the old and new at Donatos, enabling us to minimize the impact of our migration to Java by allowing users to continue using a familiar application while providing the flexibility and freedom to execute a transition plan on the company’s timetable.
Mike Born, software development manager, Donatos

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