Provided by: nilfs-tools_2.1.0-1_amd64
nilfs-tune - adjust tunable file system parameters on NILFS file system
nilfs-tune [options] device
nilfs-tune is a utility to modify tunable file system parameters on NILFS2 file system in device. This command is valid for inactive NILFS2 file systems. Modifying active mounts may cause severe damage.
-f Force to modify even the specified file system is mounted. -i interval Set the commit interval of segment. -m block-max Set the threshold of the data amount of the segment construction. -l List the contents of the file system superblock, including the current values of the parameters that can be set via this program. -L volume-label Set the volume label of the file system. NILFS2 file system labels can be at most 80 bytes long. If volume-label is longer than 80 bytes, nilfs-tune will truncate it. The volume label can be used mount(8) and /etc/fstab(5) (and possibly others) by specifying LABEL=volume-label instead of a block special device name like /dev/sda5. -O [^]feature[,...] Set or clear the indicated filesystem features (options) in the filesystem. More than one filesystem feature can be cleared or set by separating features with commas. Filesystem features prefixed with a caret character ('^') will be cleared in the filesystem's superblock; filesystem features without a prefix character will be added to the filesystem. The following filesystem feature can be set or cleared using nilfs-tune: block_count Enable block count per checkpoint. After setting this option, fsck should be run on the filesystem to make the counts right, but no fsck tool is available yet, sorry. -U UUID Set the universally unique identifier (UUID) of the file system to UUID. The format of the UUID is a series of hex digits separated by hyphens, like this: "c1b9d5a2-f162-11cf-9ece-0020afc76f16". -h Display help message and exit.
Jiro SEKIBA <email@example.com>
nilfs-tune is part of the nilfs-utils package and is available from http://www.nilfs.org.