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README: describe the scanning mode (-m option)

Include a brief description of the two algorithms without getting
into too much detail for an ostensibly temporary feature.

Signed-off-by: Zygo Blaxell <bees@furryterror.org>
This commit is contained in:
Zygo Blaxell 2018-01-17 21:46:15 -05:00
parent 56c23c4517
commit e8b4ab54c6

View File

@ -500,6 +500,11 @@ Command Line Options
Default is 1.0, i.e. 1 worker thread per detected CPU. Use values Default is 1.0, i.e. 1 worker thread per detected CPU. Use values
below 1.0 to leave some cores idle, or above 1.0 if there are more below 1.0 to leave some cores idle, or above 1.0 if there are more
disks than CPUs in the filesystem. disks than CPUs in the filesystem.
* --scan-mode (-m) MODE
* Specify extent scanning algorithm. Default mode is 0.
_EXPERIMENTAL_ feature that may go away.
* Mode 0: scan extents in ascending order of (inode, subvol, offset).
* Mode 1: scan extents in round-robin order from each subvol.
* --timestamps (-t) * --timestamps (-t)
* Enable timestamps in log output. * Enable timestamps in log output.
* --notimestamps (-T) * --notimestamps (-T)