mirror of
https://github.com/ceph/ceph
synced 2024-12-21 10:54:42 +00:00
24 lines
929 B
ReStructuredText
24 lines
929 B
ReStructuredText
.. _ceph-volume-overview:
|
|
|
|
Overview
|
|
--------
|
|
The ``ceph-volume`` tool aims to be a single purpose command line tool to deploy
|
|
logical volumes as OSDs, trying to maintain a similar API to ``ceph-disk`` when
|
|
preparing, activating, and creating OSDs.
|
|
|
|
It deviates from ``ceph-disk`` by not interacting or relying on the udev rules
|
|
that come installed for Ceph. These rules allow automatic detection of
|
|
previously setup devices that are in turn fed into ``ceph-disk`` to activate
|
|
them.
|
|
|
|
|
|
``ceph-volume lvm``
|
|
-------------------
|
|
By making use of :term:`LVM tags`, the :ref:`ceph-volume-lvm` sub-command is
|
|
able to store and later re-discover and query devices associated with OSDs so
|
|
that they can later activated. This includes support for lvm-based technologies
|
|
like dm-cache as well.
|
|
|
|
For ``ceph-volume``, the use of dm-cache is transparent, there is no difference
|
|
for the tool, and it treats dm-cache like a plain logical volume.
|