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Merge pull request #32041 from dzafman/wip-balancer3-pending

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release note: Add pending release notes for already merged code

Reviewed-by: Neha Ojha <nojha@redhat.com>
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David Zafman 2019-12-10 10:56:04 -08:00 committed by GitHub
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@ -273,3 +273,13 @@
named 'Records'. Note that this does not affect pulling bucket notification
from a subscription in a 'pubsub' zone, as these are already wrapped inside
that array.
* The configuration value ``osd_calc_pg_upmaps_max_stddev`` used for upmap
balancing has been removed. Instead use the mgr balancer config
``upmap_max_deviation`` which now is an integer number of PGs of deviation
from the target PGs per OSD. This can be set with a command like
``ceph config set mgr mgr/balancer/upmap_max_deviation 2``. The default
``upmap_max_deviation`` is 1. There are situations where crush rules
would not allow a pool to ever have completely balanced PGs. For example, if
crush requires 1 replica on each of 3 racks, but there are fewer OSDs in 1 of
the racks. In those cases, the configuration value can be increased.