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doc: Added topic for adding OSDs and adjusting CRUSH weights.

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Signed-off-by: John Wilkins <john.wilkins@inktank.com>
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John Wilkins 2012-11-07 14:05:15 -08:00
parent 764ec3650f
commit 07f60d4505
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doc/cluster-ops/add-or-rm-osds.rst
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@ -134,6 +134,15 @@ hard disks than older hosts in the cluster (i.e., they may have greater weight).
ceph osd crush set {id} {name} {weight} [{bucket-type}={bucket-name}, ...]
.. topic:: Argonaut (v0.48) Best Practices
To limit impact on user I/O, add an OSD to the CRUSH map with an initial
weight of ``0``. Then, ramp up the CRUSH weight a little bit at a time
(e.g., ``0.2``) and allow migration to complete. Continue to increment
the CRUSH weight until you reach your desired CRUSH weight. This practice
will no longer be necessary in Bobtail and subsequent releases.
Adding an OSD (Chef)
--------------------