$filterdir/nbdkit-rotational-filter.so
The filter.
Use "nbdkit --dump-config" to find the location of $filterdir.
nbdkit-rotational-filter1
Set if a plugin is rotational or not
Usage
nbdkit --filter=rotational
PLUGIN
[{rotational=true | false}]
Overview
"nbdkit-rotational-filter" is a filter for nbdkit(1) which lets you change the rotational property of a plugin.
The rotational property is a boolean flag which hints to the client whether the plugin behaves like a spinning disk (if rotational is true) or like a solid state disk or RAM (if rotational is false). If a disk is rotational, then the client may attempt to schedule disk accesses to reduce seek times using the elevator algorithm (https://en.wikipedia.org/wiki/Elevator_algorithm).
Adding this filter without using the "rotational" parameter forces the plugin to advertise that it is rotational. You can explicitly set the rotational property by using "rotational=true" or "rotational=false".
Parameters
rotational=true-
Set the rotational property, indicating that the plugin behaves like a spinning disk. This is the default when you enable this filter.
rotational=false-
Clear the rotational property, indicating that the plugin behaves like a solid state disk or RAM.
Files
Version
"nbdkit-rotational-filter" first appeared in nbdkit 1.40.