Chapter 6 Managing the File System
Working With Stripe Groups
6 After the status screen indicates that the disk has been deleted, click
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| Close. | |
| This procedure describes how to defragment a disk using the | ||
Defragmenting a Disk | |||
snfsdefrag utility to relocate SNFS file data into a single, | |||
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| 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 | ||
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| computer where the StorNext server (not the client) is installed. | |
| 2 Do one of the following: | ||
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| • To defragment a single file or a list of files, type: | |
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| /usr/cvfs/bin/snfsdefrag <filename> [filename ....] | |
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| • To perform a recursive defragment on files in a directory, type: | |
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| /usr/cvfs/bin/snfsdefrag | |
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| If the directory_name value is equal to the mount point, then the | |
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| entire StorNext file system is defragmented. | |
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| Note: For more information about using the snfsdefrag | |
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| command, refer to the snfsdefrag(1) man pages. | |
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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.)
StorNext User’s Guide | 111 |
