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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
below 1.0 to leave some cores idle, or above 1.0 if there are more
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)
* Enable timestamps in log output.
* --notimestamps (-T)