OpenVMS RMS & Data Migration to Linux (VX/RMS, FDL, DataX)

VX/DATAX is a powerful data migration and conversion tool specifically designed to transport OpenVMS RMS data files to Linux platforms. This tool enables organizations to seamlessly migrate their legacy data while maintaining complete data integrity and structure preservation.

Key capabilities include:

• Transport OpenVMS RMS data files to Linux
• Convert and transform data schemas for compatibility with target platforms
• Support multiple data formats including SEQUENTIAL, RELATIVE, KEYED SEQUENTIAL, and VIRTUAL BLOCK FILES
• Recreate files in the original format while ensuring data integrity
• Perform automatic endian and floating-point conversions

Companies like Sprint T-Mobile have successfully leveraged Sector7's data migration expertise to modernize their critical systems. For more information about how VX/DATAX can help your organization, please contact us.

VX/DATAX automatically handles critical data format conversions to ensure compatibility between OpenVMS and modern Linux systems. The tool performs intelligent transformations while preserving data integrity throughout the migration process.

The primary conversions include:

• DEC Floating Point to IEEE 754: Converts legacy DEC floating-point format to industry-standard IEEE 754
• Endian Conversion: Handles Little Endian to Big Endian conversion when required
• Date/Time Format: Transforms Quadword Date/Time to standard Linux/DateTime format

Organizations such as Allianz have benefited from Sector7's comprehensive data conversion capabilities during their modernization projects. To learn more about how these conversions can support your migration, contact our team.

VX/DATAX ensures complete preservation of RMS file structure and indexing through its sophisticated recreation process. The tool supports all OpenVMS RMS file types and maintains relational consistency by fully recreating all ISAM keys.

Supported file types include SEQUENTIAL, RELATIVE, KEYED SEQUENTIAL, and VIRTUAL BLOCK FILES. VX/DATAX recreates these files using industry-standard C-ISAM format while preserving all original structural elements. The tool integrates seamlessly with VX/RMS, ensuring that migrated data can be used directly by applications running on modern platforms.

This level of precision has been crucial for companies like Amprion GmbH in maintaining their critical infrastructure systems during migration. If you need to preserve complex data structures during your migration, please reach out to us.

When migrating floating-point data from DEC to IEEE 754 format, there are important precision considerations to understand. While integer data (both short and long) converts perfectly with no loss of accuracy, floating-point conversions require careful attention.

DEC Floating Point provides 4 more digits of precision than IEEE 488, while IEEE 488 offers a larger numerical range but with slightly reduced accuracy. VX/DATAX addresses this challenge by applying intelligent rounding techniques to minimize accuracy loss during the conversion process.

For most business applications, this precision difference is negligible, but for scientific or financial calculations requiring extreme precision, it's important to validate results. Companies like AMCO have successfully navigated these considerations during their modernization projects. Our team can help you assess the impact on your specific applications - contact us for a detailed analysis.

VX/RMS is a call-compatible library that enables seamless migration of VMS/OpenVMS RMS applications to Linux without requiring any source code changes. It provides complete support for all VMS file types, access modes, record formats, and file locking mechanisms.

By implementing the SYS$ API set, VX/RMS ensures your applications function identically on Linux as they did on VMS/OpenVMS, eliminating the need for extensive rewrites. To discuss your specific migration requirements, contact us.

VX/RMS supports all VMS/OpenVMS RMS file types including Indexed, Relative, Sequential, and Block mode files with full compatibility.

VX/RMS implements all essential SYS$ API calls including SYS$OPEN, SYS$GET, SYS$PUT, SYS$READ, SYS$WRITE, SYS$UPDATE, SYS$SEARCH, SYS$PARSE, and SYS$RENAME among others.

VX/RMS retains VMS/OpenVMS record-locking mechanisms while supporting enhanced Linux locking standards, ensuring data integrity and concurrent access control.

VX/RMS automatically translates VMS-style file paths and logicals into Linux equivalents, maintaining application compatibility without manual intervention.

VX/RMS includes call-compatible FDL libraries supporting ANALYZE/FDL, CREATE/FDL, FDL$CREATE, FDL$GENERATE, FDL$PARSE, and FDL$RELEASE functions for complete file definition compatibility.

VX/FDL is an implementation of OpenVMS File Description Language (FDL) for Linux that enables the creation, analysis, and management of RMS files with identical structure and behavior to their VMS counterparts. It provides a seamless migration path for legacy RMS data to remain accessible and functional on modern Linux platforms.

The tool allows you to import VMS/OpenVMS FDL files, recreate RMS files with all supported organizations and formats, and leverage VX/DCL commands for comprehensive file management. For organizations looking to modernize their infrastructure, contact us to discuss your specific migration requirements.

VX/FDL handles all Indexed, Relative, and Sequential RMS file organizations with full compatibility.

VX/FDL supports Sequential and Fixed record formats, ensuring 1:1 mapping with VMS files for complete compatibility.

Use the CREATE/FDL command to read your FDL file and generate a matching RMS file on Linux.

Yes, VX/FDL includes the ANALYZE/FDL command that extracts an FDL specification from existing RMS files. This reverse capability allows you to document and recreate file structures as needed.

Organizations like Telstra have successfully used similar RMS migration approaches during their OpenVMS modernization projects.

VX/DCL includes CREATE/FDL for creating RMS files from FDL specifications and ANALYZE/FDL for extracting FDL specifications from existing RMS files.

VX/FDL provides a call-compatible library with full implementation of the FDL$() API functions. This includes FDL$CREATE for creating RMS files, FDL$GENERATE for generating FDL files, FDL$PARSE for parsing existing FDL files, and FDL$RELEASE for memory management.

VX/FDL delivers full compatibility with VMS/OpenVMS FDL, enabling seamless migration of RMS files to Linux while providing identical structure and behavior for RMS data. The tool includes VX/DCL support for automation and supports both command-line and API-based workflows.

Companies like BNY Mellon have leveraged similar file system migration capabilities during their OpenVMS to Linux transitions. VX/FDL ensures legacy RMS data remains accessible, structured, and functional on modern platforms. To explore how VX/FDL can support your migration strategy, contact us for a consultation.

No. VX/RMS is a call-compatible library, so OpenVMS RMS applications move to Linux and Windows without source code changes. It presents the same SYS$ API and file behaviour, so existing programs open, read, write, and lock records exactly as they did on VMS.

All OpenVMS RMS file organizations: indexed, relative, and sequential, along with their associated access modes and record formats. Sequential and relative files map onto plain host files, and indexed files use a keyed store.

Yes. It retains the OpenVMS record-locking behaviour and applies host byte-range locks for sequential and relative files and record locks for indexed files, so concurrent-access behaviour is maintained after migration.

VX/RMS parses VMS-style file specifications and translates logical names into their host equivalents automatically, so applications keep using VMS file specs without manual path rewriting.

VX/RMS maps native host error numbers back to their corresponding VMS RMS status values. For example, a host file-not-found error becomes RMS$_FNF, so code that inspects RMS status values continues to behave as it did on VMS.

VX/RMS implements the OpenVMS RMS callable services, including SYS$OPEN, SYS$CREATE, SYS$CLOSE, SYS$CONNECT, SYS$GET, SYS$PUT, SYS$FIND, SYS$UPDATE, SYS$DELETE, SYS$PARSE, and SYS$SEARCH, each with an EXE$ inner variant and Fortran-compatible aliases.

Yes. VX/RMS provides call-compatible FDL support, including CREATE/FDL, ANALYZE/FDL, and the FDL$CREATE, FDL$GENERATE, FDL$PARSE, and FDL$RELEASE routines, so FDL-based file definition and analysis carry over to the migrated environment.

VX/RMS is a call-compatible library that runs OpenVMS RMS applications on Linux and Windows without source code changes. It supports all RMS file types, access modes, record formats, and locking, and implements the SYS$ API, so applications keep working on a modern platform with no rewrite.

VX/FDL is an implementation of the OpenVMS File Definition Language (FDL) for Linux and Windows. It lets you create, analyze, and manage RMS files with the same structure and behaviour as their VMS counterparts, so FDL-based file definitions carry over to modern platforms.

VX/FDL handles all Indexed, Relative, and Sequential RMS file organizations, and supports Sequential and Fixed record formats, giving a 1:1 mapping with the original VMS files.

Use the CREATE/FDL command (via VX/DCL) or the FDL$CREATE API call to read your FDL file and create a matching RMS file on Linux or Windows.

Use the ANALYZE/RMS_FILE command with /OUTPUT (via VX/DCL) or the FDL$GENERATE API call to extract an FDL specification from an RMS file, which can then recreate the file structure.

Two main commands: CREATE/FDL, which creates an RMS file from an FDL specification (via FDL$CREATE), and ANALYZE/RMS_FILE, which analyses an RMS file and, with /OUTPUT, writes an FDL specification describing it (via FDL$GENERATE). CONVERT/FDL is also available for loading records into a new FDL-defined RMS file.

Yes. VX/FDL includes a call-compatible library implementing the FDL$() API: FDL$CREATE (create an RMS file from FDL), FDL$GENERATE (generate FDL from an RMS file), FDL$PARSE (parse an existing FDL file), and FDL$RELEASE (release FDL structures from memory), so it fits both scripted and application-integrated workflows.

Yes. VX/FDL can import VMS and OpenVMS FDL files and recreate the corresponding RMS files with all supported organizations and formats. This preserves the file structure defined on the original VMS system.

By reproducing RMS file structures with identical behaviour on Linux and Windows, VX/FDL keeps legacy RMS data accessible, structured, and functional on modern platforms. It supports both command-line (VX/DCL) and API-based workflows, providing a migration path for OpenVMS applications that depend on FDL-defined files.