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Sun QFS File System 5.3 Configuration and Administration Guide Sun QFS and Sun Storage Archive Manager 5.3 Information Library |
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Sun QFS File System 5.3 Configuration and Administration Guide Sun QFS and Sun Storage Archive Manager 5.3 Information Library |
2. About the Master Configuration File
4. Configuring the File System
5. Configuring a Shared File System
6. Administering File System Quotas
7. Advanced File System Topics
9. Configuring WORM-FS File Systems
Increasing File Transfer Performance for Large Files
How to Increase File Transfer Performance
Tuning the Number of Inodes and the Inode Hash Table
When to Set the ninodes and nhino Parameters
11. Using QFS File Systems with SANergy (SAN-QFS)
Two mount parameters control the flush-behind rate for pages written sequentially and for stage pages. The flush_behind and stage_flush_behind mount parameters are read from the samfs.cmd file, the /etc/vfstab file, or the mount command.
The flush_behind=n mount parameter sets the maximum flush-behind value. Modified pages that are being written sequentially are written to disk asynchronously to help the Solaris Volume Manager (SVM) layer keep pages clean. To enable this feature, set n to be an integer from 16 through 8192. By default, n is set to 0, which disables this feature. The n argument is specified in kilobyte units.
The stage_flush_behind=n mount parameter sets the maximum stage flush-behind value. Stage pages that are being staged are written to disk asynchronously to help the SVM layer keep pages clean. To enable this feature, set n to be an integer from 16 through 8192. By default, n is set to 0, which disables this feature. The n argument is specified in kilobyte units.
For more information about these mount parameters, see mount_samfs(1M) in Sun QFS and Sun Storage Archive Manager 5.3 Reference Manual or samfs.cmd(4) in Sun QFS and Sun Storage Archive Manager 5.3 Reference Manual.
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