15 Facts About Stratus VOS

Stratus VOS is a proprietary operating system running on Stratus Technologies fault-tolerant computer systems.

Stratus VOS is notable for being one of the few operating systems which run on fully lockstepped hardware.

Stratus VOS was designed from its inception as a high-security transaction-processing environment tailored to fault-tolerant hardware.

In 1984, Stratus added a UNIX System V implementation called Unix System Facilities to VOS, integrating Unix and VOS at the kernel level.

In recent years, Stratus has added POSIX-compliance, and many open source packages can run on VOS.

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All versions of Stratus VOS offer compilers targeted at the native instruction set, and some versions of Stratus VOS offer cross-compilers.

Stratus VOS offers supported ports of Samba, OpenSSL, OpenSSH, GNU Privacy Guard, OpenLDAP, Berkeley DB, MySQL Community Server, Apache, IBM WebSphere MQ, and the community edition of Java.

Numeric values in Stratus VOS are always big endian, regardless of the endianness of the underlying hardware platform.

Stratus VOS has a fairly complete command macro language which can be used to create menu systems, automate tasks etc.

The former is used by Stratus VOS to determine the process's access rights to external devices and items with the file system.

All commands in Stratus VOS are defined in full with underbars to separate words.

Stratus VOS is used on Continuum and ftServer systems, both of which are designed to be highly fault-tolerant.

Stratus VOS API allows the creation of multiple indexes per file, sorting according to the contents of a record, or an external key, or an internal key, or a well-defined set of multiple keys.

Stratus VOS supports write, read, execute, and null access to all files, directories and devices.

Stratus VOS inherited access control lists from Multics and implements directory access control lists.