Le 11/03/2015 05:44, Francois Lafont a écrit :
> PS: here is my conf.
> [...]
I have this too:
~# ceph osd crush show-tunables
{ "choose_local_tries": 0,
"choose_local_fallback_tries": 0,
"choose_total_tries": 50,
"chooseleaf_descend_once": 1,
"chooseleaf_vary_r": 0,
"straw_calc_version": 1,
"profile": "unknown",
"optimal_tunables": 0,
"legacy_tunables": 0,
"require_feature_tunables": 1,
"require_feature_tunables2": 1,
"require_feature_tunables3": 0,
"has_v2_rules": 0,
"has_v3_rules": 0}
And in the online documentation, I can read this:
http://ceph.com/docs/master/rados/operations/crush-map/#crush-tunables3
"Legacy default is 0, but with this value CRUSH is sometimes unable to
find a mapping."
Is this my problem?
Should I do this in my cluster?
ceph osd crush set-tunable chooseleaf_vary_r 1
But here
http://ceph.com/docs/master/rados/operations/crush-map/#which-client-versions-support-crush-tunables3,
I can read: "Linux kernel version v3.15 or later (for the file system and RBD
kernel clients)"
and It could be a problem for me because I have clients with kernel version
3.13 (Ubuntu 14.04).
--
François Lafont
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