crush: set_choose_tries = 100 for erasure code rulesets#4031
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It is common for people to try to map 9 OSDs out of a 9 OSDs total ceph cluster. The default tries (50) will frequently lead to bad mappings for this use case. Changing it to 100 makes no significant CPU performance difference, as tested manually by running crushtool on one million mappings. http://tracker.ceph.com/issues/10353 Fixes: #10353 Signed-off-by: Loic Dachary <ldachary@redhat.com> (cherry picked from commit 2f87ac8)
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SUCCESS: the output of run-make-check.sh on centos-7 for 048fcc8 is http://paste2.org/FPm43XvP |
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crush: set_choose_tries = 100 for erasure code rulesets
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It is common for people to try to map 9 OSDs out of a 9 OSDs total ceph
cluster. The default tries (50) will frequently lead to bad mappings for
this use case. Changing it to 100 makes no significant CPU performance
difference, as tested manually by running crushtool on one million
mappings.
http://tracker.ceph.com/issues/10353 Fixes: #10353
Signed-off-by: Loic Dachary ldachary@redhat.com
(cherry picked from commit 2f87ac8)