Is there a way to disable the warning (shown when doing "ceph -s", for
example) about the number of pgs ("too few pgs per osd") ?
Would it be considered risky to disable it?
Consider when a cluster is initially created with just a single pool,
and you don't anticipate that this pool will ever be more than a very
small percentage of the total capacity (1%, for example). The new
calculator (http://ceph.com/pgcalc) recommends a small pg_num like
128. However, for a cluster with 144 OSDs, this will trigger the
warning about the pg num being too small.
It seems that the calculation that triggers the warning is a little
bit too simplistic, and while it might be useful in some cases, it is
also a nuisance warning that can be ignored in some environments. It
would be nice to tell ceph to ignore it and return a healthy status if
everything else is clean.
-Wyllys Ingersoll
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