Hi,
On 02/04/2016 03:17 PM, Kyle Harris wrote:
Hello,
I have been working on a very basic cluster with 3 nodes and a single
OSD per node. I am using Hammer installed on CentOS 7
(ceph-0.94.5-0.el7.x86_64) since it is the LTS version. I kept
running into an issue of not getting past the status of
undersized+degraded+peered. I finally discovered the problem was that
in the default CRUSH map, the weight assigned is 0. I changed the
weight and everything came up as it should. I did the same test using
the Infernalis release and everything worked as expected as the weight
has been changed to a default of 321.
- Is this a bug or by design and if the latter, why? Perhaps I'm
missing something?
- Has anyone else ran into this?
- Am I correct in assuming a weight of 0 won't allow the OSDs to be
used or is there some other purpose for this?
The default weight is the size of the OSD in tera bytes. Did you use a
very small OSD partition for test purposes, e.g. 20 GB? In that case the
weight is rounded and results in an effective weight of 0.0. As a result
the OSD will not be used for data storage.
Regards,
Burkhard
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