Overview of VERITAS product documentation on UnixWare 7 systems

• The ``basic'' version of the VERITAS filesystem (VxFS). It includes only the following functionality:

  • extent-based allocation (file storage is allocated as one or more adjacent blocks of data)

  • extent attributes (extent allocation policies associated with a file)

  • fast filesystem recovery (recovery following a system failure is speeded up by use of a tracking feature called ``intent logging'')

  • enhanced security (the Discretionary Access Control (DAC) mechanism)

  • support for BSD-style quotas

  • support for large files and large filesystems (larger than 2GB)

• The ``basic'' version of the VERITAS Volume Manager (VxVM). It includes only the following functionality:

  • concatenation (data is mapped linearly onto one or more subdisks in a plex)

  • spanning (concatenation using subdisks that reside on more than one VM disk)

• The VERITAS Visual Administrator (VxVA). (A graphical user interface for Volume Manager. Although all Volume Manager functionality is covered, the interface will prevent you from executing tasks that apply to products you have not licensed.)

In addition, you can license the following products.

• The advanced VERITAS filesystem product (VxFS). It adds the following functionality to the ``basic'' version:

  • online administration (defragmentation and resizing of filesystems)

  • snapshot mounts for online backup

  • enhanced application interface (for pre-allocation, unbuffered I/O, and caching advisories.

  • enhanced mount options

  • improved synchronous write performance

  • enhanced I/O performance

  • DMAPI (Data Management API)

• The VERITAS mirroring product. Mirroring adds the following functionality to the ``basic'' version of Volume Manager:

  • mirroring (a technique of using multiple plexes to duplicate the information contained in a volume)

• The advanced VERITAS Volume Manager product (VxVM). It adds the following functionality to the ``basic'' version:

  • mirroring

  • striping (a technique of mapping data so that the data is interleaved among two or more physical disks)

  • RAID-5 (a method of providing data redundancy through the use of parity--a calculated value that can be used to reconstruct data after a failure)

  • logs for mirror recovery

VERITAS books are included in SCOhelp under the ``Filesystems'' topic:

• ``Online Data Manager (ODM) overview and installation''

• VERITAS File System System Administrator's Guide

• VERITAS Volume Manager User's Guide

• VERITAS Volume Manager System Administrator's Guide