fs-qcfs.so
Shared object that supports the QNX compressed filesystem (QCFS)
Syntax:
driver … qcfs qcfs_options… &
Runs on:
QNX OS
Options:
The driver is any of the devb-* drivers, and qcfs_options is one or more of the following, separated by commas:
- verbose
- (Optional) Specify whether to print additional information during filesystem operation. Used mostly for debugging.
- mcache=size
-
(Optional) Specify the number of elements
in the compressed metadata block cache.
Caching improves performance by reducing the number of disk fetch and decompression tasks for frequently accessed compressed data blocks.
If not set, the cache is 10% of the total number of compressed metadata blocks by default. This number is part of the information that mkqfs outputs when you build the filesystem.
To disable caching, specify either 0 (zero) or disabled.
Although you can specify max to cache all metadata blocks, QNX does not recommend it.
- ccache=size
-
(Optional) Specify the number of elements
in the compressed data block cache.
Caching improves performance by reducing the number of disk fetch and decompression tasks for frequently accessed compressed data blocks.
If not set, the cache size is 10% of the total number of compressed metadata blocks by default. This number is part of the information that mkqfs outputs when you build the filesystem.
To disable caching, specify either 0 (zero) or disabled.
Although you can specify max to cache all metadata blocks, QNX does not recommend it.
Description:
The fs-qcfs.so shared object supports the QNX compressed filesystem (QCFS). It's automatically loaded by the devb-* drivers when mounting a QCFS.
Examples:
Mount a QCFS and print additional information during its operation:
mount -t qcfs -o verbose /dev/hd0 /fs