Chapter 6 Managing the File System

Working With Stripe Groups

6 After the status screen indicates that the disk has been deleted, click

 

 

Close.

 

This procedure describes how to defragment a disk using the

Defragmenting a Disk

snfsdefrag utility to relocate SNFS file data into a single, pre-allocated

 

 

extent. Reducing the number of extents in a file improves system

 

performance by minimizing disk head movement when I/O occurs. You

 

can defragment a single file or multiple files, perform a recursive

 

defragment on files in a directory, or defragment the entire file system.

 

1 Log onto a metadata controller as root. The metadata controller is the

 

 

computer where the StorNext server (not the client) is installed.

 

2 Do one of the following:

 

 

• To defragment a single file or a list of files, type:

 

 

/usr/cvfs/bin/snfsdefrag <filename> [filename ....]

 

 

• To perform a recursive defragment on files in a directory, type:

 

 

/usr/cvfs/bin/snfsdefrag -r <directory_name>

 

 

If the directory_name value is equal to the mount point, then the

 

 

entire StorNext file system is defragmented.

 

 

 

 

 

Note: For more information about using the snfsdefrag

 

 

command, refer to the snfsdefrag(1) man pages.

 

 

 

Working With Stripe Groups

A stripe group is a logical disk volume in a file system that consists of one or more LUNs used to store metadata information, journaling information, and user data. Stripe groups are used to create logical volumes that can span multiple controllers on an array and even multiple arrays for even greater performance. Stripe groups are composed of LUNs of the same size and disk class based on your cost and performance requirements. (Fibre channel provides the highest performance and duty cycle.)

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Quantum 6-01658-01 manual Working With Stripe Groups, Defragmenting a Disk

6-01658-01 specifications

Quantum 6-01658-01 is a cutting-edge solution in the realm of quantum computing technology. This model is renowned for its advanced features and capabilities, making it an essential tool for researchers and industries seeking to harness the power of quantum mechanics for practical applications.

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