* test_librbd_fsx: test krbd as well as librbd (Ilya Dryomov)
+v0.80.9 Firefly
+===============
+
+This is a bugfix release for firefly. It fixes a performance
+regression in librbd, an important CRUSH misbehavior (see below), and
+several RGW bugs. We have also backported support for flock/fcntl
+locks to ceph-fuse and libcephfs.
+
+We recommend that all Firefly users upgrade.
+
+Adjusting CRUSH maps
+--------------------
+
+* This point release fixes several issues with CRUSH that trigger
+ excessive data migration when adjusting OSD weights. These are most
+ obvious when a very small weight change (e.g., a change from 0 to
+ .01) triggers a large amount of movement, but the same set of bugs
+ can also lead to excessive (though less noticeable) movement in
+ other cases.
+
+ However, because the bug may already have affected your cluster,
+ fixing it may trigger movement *back* to the more correct location.
+ For this reason, you must manually opt-in to the fixed behavior.
+
+ In order to set the new tunable ``straw_calc_version=1``::
+
+ ceph osd crush set-tunable straw_calc_version 1
+
+ Note that this change will have no immediate effect. However, from
+ this point forward, any 'straw' bucket in your CRUSH map that is
+ adjusted will get non-buggy internal weights, and that transition
+ may trigger some rebalancing.
+
+ You can estimate how much rebalancing will eventually be necessary
+ on your cluster with::
+
+ ceph osd getcrushmap -o /tmp/cm
+ crushtool -i /tmp/cm --num-rep 3 --test --show-mappings > /tmp/a 2>&1
+ crushtool -i /tmp/cm --set-straw-calc-version 1 -o /tmp/cm2
+ crushtool -i /tmp/cm2 --reweight -o /tmp/cm2
+ crushtool -i /tmp/cm2 --num-rep 3 --test --show-mappings > /tmp/b 2>&1
+ wc -l /tmp/a # num total mappings
+ diff -u /tmp/a /tmp/b | grep -c ^+ # num changed mappings
+
+ Divide the total number of lines in /tmp/a with the number of lines
+ changed. We've found that most clusters are under 10%.
+
+ You can force all of this rebalancing to happen at once with::
+
+ ceph osd crush reweight-all
+
+ Otherwise, it will happen at some unknown point in the future when
+ CRUSH weights are next adjusted.
+
+Notable Changes
+---------------
+
+* ceph-fuse: flock, fcntl lock support (Yan, Zheng, Greg Farnum)
+* crush: fix straw bucket weight calculation, add straw_calc_version tunable (#10095 Sage Weil)
+* crush: fix tree bucket (Rongzu Zhu)
+* crush: fix underflow of tree weights (Loic Dachary, Sage Weil)
+* crushtool: add --reweight (Sage Weil)
+* librbd: complete pending operations before losing image (#10299 Jason Dillaman)
+* librbd: fix read caching performance regression (#9854 Jason Dillaman)
+* librbd: gracefully handle deleted/renamed pools (#10270 Jason Dillaman)
+* mon: fix dump of chooseleaf_vary_r tunable (Sage Weil)
+* osd: handle no-op write with snapshot (#10262 Sage Weil)
+* radosgw-admin: create subuser when creating user (#10103 Yehuda Sadeh)
+* rgw: S3 object copy content-type fix (#9478 Yehuda Sadeh)
+* rgw: URL decode query params correctly (#10271 Georgio Dimitrakakis, Yehuda Sadeh)
+* rgw: change multipart uplaod id magic (#10271 Georgio Dimitrakakis, Yehuda Sadeh)
+* rgw: fix partial swift GET (#10553 Yehuda Sadeh)
+* rgw: fix quota disable (#9907 Dong Lei)
+* rgw: index swift keys appropriately (#10471 Hemant Burman, Yehuda Sadeh)
+* rgw: make setattrs update bucket index (#5595 Yehuda Sadeh)
+* rgw: remove swift user manifest (DLO) hash calculation (#9973 Yehuda Sadeh)
+* rgw: return correct len for 0-len objects (#9877 Yehuda Sadeh)
+* rgw: send ETag on S3 object copy (#9479 Yehuda Sadeh)
+* rgw: send HTTP status reason explicitly in fastcgi (Yehuda Sadeh)
+* rgw: set ulimit -n from sysvinit (el6) init script (#9587 Sage Weil)
+* rgw: update swift subuser permission masks when authenticating (#9918 Yehuda Sadeh)
+* rgw: use \r\n for http headers (#9254 Benedikt Fraunhofer, Yehuda Sadeh)
+* rgw: use attrs when reading object attrs (#10307 Yehuda Sadeh)
+
+
v0.80.8 Firefly
===============
projects / ceph.git / commitdiff