The Veritas File System (VxFS or vxfs) is an extent based, journaling file system intended for use with all UNIX flavours,Linux distributions and Windows servers. VxFS provides enhancements that increase UNIX usability and make the UNIX system more viable for use in the commercial marketplace. VxFS is particularly useful in environments that require high performance and availability and deal with large volumes of data.

Minimum Prerequisites

Experience as a system administrator working in a UNIX environment.

Audience

System administrators who configure and maintain UNIX systems with the VERITAS File System (referred to as VxFS® or vxfs). As well as:

• a basic understanding of system administration
• a working knowledge of the UNIX system
• a general understanding of file systems

Included Labs

Labs to be provided by the trainer

What will you learn?

Introducing Veritas File System
• About Veritas File System
• Logging
• Extents
• File system disk layouts
• Veritas File System features
• Extent-based allocation
• Extent attributes
• Fast file system recovery
• Extended mount options
• Enhanced data integrity modes
• Enhanced performance mode
• Modes of temporary file systems
• Improved synchronous writes
• Support for large files
• Access Control Lists
• Storage Checkpoints
• Online backup
• Quotas
• Support for databases
• Cluster file systems
• Cross-platform data sharing
• File Change Log
• Multi-volume support

VxFS performance: creating, mounting, and tuning
• File Systems
• mkfs command options
• Block size
• Intent log size
• Choosing mount command options
• The log mode
• The delaylog mode
• The tmplog mode
• The logiosize mode
• The nodatainlog mode
• The blkclear mode
• The mincache mode
• The convosync mode
• The ioerror mode
• The largefiles|nolargefiles option
• The cio option
• Combining mount command options
• Using kernel tunables
• Tuning inode table size
• vx_maxlink
• Veritas Volume Manager maximum I/O size
• Monitoring free space
• Monitoring fragmentation
• Tuning I/O
• Tuning VxFS I/O parameters
• Tunable I/O parameters

Extent attributes
• About extent attributes
• Reservation: preallocating space to a file
• Fixed extent size
• Other controls
• Commands related to extent attributes
• Failure to preserve extent attributes

VxFS I/O Overview
• About VxFS I/O
• Buffered and Direct I/O
• Direct I/O
• 4 Contents
• Unbuffered I/O
• Data synchronous I/O
• Cache advisories
• Freezing and thawing a file system
• Getting the I/O size
• Getting the I/O size
• Getting the I/O size
• Getting the I/O size

Storage Checkpoints
• About Storage Checkpoints
• How Storage Checkpoints differ from snapshots
• How a Storage Checkpoint works
• Copy-on-write
• Types of Storage Checkpoints
• Data Storage Checkpoints
• nodata Storage Checkpoints
• Removable Storage Checkpoints
• Non-mountable Storage Checkpoints
• Storage Checkpoint administration
• Creating a Storage Checkpoint
• Removing a Storage Checkpoint
• Accessing a Storage Checkpoint
• Converting a data Storage Checkpoint to a nodata Storage
• Checkpoint
• Space management considerations
• Restoring a file system from a Storage Checkpoint
• Restoring a file from a Storage Checkpoint
• Storage Checkpoint quotas

Online backup using file system snapshots
• About snapshot file systems
• Snapshot file system backups
• Creating a snapshot file system
• Backup examples
• Snapshot file system performance
• Differences between snapshots and Storage Checkpoints
• About snapshot file system disk structure
• How a snapshot file system works

Quotas
• About quota limits
• About quota files on &ProductNameLong;
• About quota commands
• About quota checking with Veritas File System
• Using quotas
• Turning on quotas
• Turning on quotas at mount time
• Editing user and group quotas
• Modifying time limits
• Viewing disk quotas and usage
• Displaying blocks owned by users or groups
• Turning off quotas

IFile Change Log
• About the File Change Log file
• File Change Log administrative interface
• File Change Log programmatic interface
• Reverse path name lookup