HP JFS 3.3 and HP OnLineJFS 3.3 VERITAS File System 3.3 System Administrator's Guide

92 Chapter5
Performance and Tuning
Introduction
Introduction
For any file system, the ability to provide peak performance is important.
Adjusting the available VxFS file system options provides a way to
optimize system performance. This chapter describes tools that an
administrator can use to optimize VxFS. For information on optimizing
an application for use with VxFS, see Chapter 6 , “Application Interface.”
The following topics are covered in this chapter:
• “Choosing a Block Size”
• “Choosing an Intent Log Size”
• “Choosing Mount Options”
— “log”
— “delaylog”
— “tmplog”
— “nolog”
— “nodatainlog”
— “blkclear”
— “mincache”
— “convosync”
— “Combining mount Options”
• “Kernel Tuneables”
— “Internal Inode Table Size”
• “Monitoring Free Space”
— “Monitoring Fragmentation”
• “I/O Tuning”
— “Tuning VxFS I/O Parameters”
— “Tuneable VxFS I/O Parameters”