ceph/PendingReleaseNotes

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v0.74
~~~~~
- We now default to the 'bobtail' CRUSH tunable values that are first supported
by Ceph clients in bobtail (v0.48) and Linux kernel version v3.9. If you
plan to access a newly created Ceph cluster with an older kernel client, you
should use 'ceph osd crush tunables legacy' to switch back to the legacy
behavior. Note that making that change will likely result in some data
movement in the system, so adjust the setting before populating the new
cluster with data.
- We now set the HASHPSPOOL flag on newly created pools (and new
clusters) by default. Support for this flag first appeared in
v0.64; v0.67 Dumpling is the first major release that supports it.
It is first supported by the Linux kernel version v3.9. If you plan
to access a newly created Ceph cluster with an older kernel or
clients (e.g, librados, librbd) from a pre-dumpling Ceph release,
you should add 'osd pool default flag hashpspool = false' to the
'[global]' section of your 'ceph.conf' prior to creating your
monitors (e.g., after 'ceph-deploy new' but before 'ceph-deploy mon
create ...').
v0.72.2
~~~~~~~
- As part of fix for #6796, 'ceph osd pool set <pool> <var> <arg>' now
receives <arg> as an integer instead of a string. This affects how
'hashpspool' flag is set/unset: instead of 'true' or 'false', it now
must be '0' or '1'.