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Contents

Chapter 1 Veritas File System software developer's kit

About the software developer's kit

File system software developer's kit features

API library interfaces

File Change Log

Multi-volume support

VxFS I/O

Software developer's kit packages

Required libraries and header files

Compiling environment

Recompiling with a different compiler

Chapter 2 File Change Log

About the File Change Log file

Recorded changes

Using the FCL file

FCL logging activation

FCL file layout

Record types

Special records

Typical record sequences

FCL tunables

How tunables handle FCL growth size

Programmatic interface

Ease of use

Backward compatibility

API functions

FCL record

Copying FCL records

VxFS and FCL upgrade and downgrade

Reverse path name lookup

Inodes

vxfs_inotopath_gen

Chapter 3 Multi-volume support

About multi-volume support

Uses for multi-volume support

Volume application programmatic interfaces

Administering volume sets

Querying the volume set for a file system

Modifying a volume within a file system

Encapsulating and de-encapsulating a volume

Allocation policy application programmatic interfaces

Directing file allocations

Creating and assigning policies

Querying the defined policies

Enforcing a policy on a file

Deleting a policy on a file

Pattern-based policies

Data structures

Using policies and application programmatic interfaces

Defining and assigning allocation policies

Using volume application programmatic interfaces

Chapter 4 Named data streams

About named data streams

Uses for named data streams

Named data streams programmatic interface

Listing named data streams

Namespace for named data streams

Behavior changes in other system calls

Querying named data streams

Application programmatic interface

Command reference

Chapter 5 VxFS I/O Application Interface

Freeze and thaw

Caching advisories

Direct I/O

Concurrent I/O

Unbuffered I/O

Other advisories

Extents

Extent attributes

Reservation: preallocating space to a file

Fixed extent size

Application programming interface for extent attributes

Allocation flags

Allocation flags with fixed extent size

How to use extent attribute APIs