Re: [ceph-users] How to see which crush tunables are active in a ceph-cluster?
Hi,
for information for other cepher...
I switched from unknown crush tunables to firefly and it's takes 6 hour
(30.853% degration) to finisched on our production-cluster (5 Nodes, 60
OSDs, 10GBE, 20% data used: pgmap v35678572: 3904 pgs, 4 pools, 21947
GB data, 5489 kobjects).
Should an chooseleaf_vary_r 1 (from 0) take round about the same time
to finished??
Regards
Udo
On 04.12.2014 14:09, Udo Lembke wrote:
Hi,
to answer myself.
With ceph osd crush show-tunables I see a little bit more, but doesn't
know how far away from firefly-tunables I'm at the procuction cluster are.
New testcluster with profile optimal:
ceph osd crush show-tunables
{ choose_local_tries: 0,
choose_local_fallback_tries: 0,
choose_total_tries: 50,
chooseleaf_descend_once: 1,
profile: firefly,
optimal_tunables: 1,
legacy_tunables: 0,
require_feature_tunables: 1,
require_feature_tunables2: 1}
the production cluster:
ceph osd crush show-tunables
{ choose_local_tries: 0,
choose_local_fallback_tries: 0,
choose_total_tries: 50,
chooseleaf_descend_once: 0,
profile: unknown,
optimal_tunables: 0,
legacy_tunables: 0,
require_feature_tunables: 1,
require_feature_tunables2: 0}
Look this like argonaut or bobtail?
And how proceed to update?
Does in makes sense first go to profile bobtail and then to firefly?
Regards
Udo
Am 01.12.2014 17:39, schrieb Udo Lembke:
Hi all,
http://ceph.com/docs/master/rados/operations/crush-map/#crush-tunables
described how to set the tunables to legacy, argonaut, bobtail, firefly
or optimal.
But how can I see, which profile is active in an ceph-cluster?
With ceph osd getcrushmap I got not realy much info
(only tunable choose_local_tries 0
tunable choose_local_fallback_tries 0
tunable choose_total_tries 50)
Udo
_
___
ceph-users mailing list
ceph-users@lists.ceph.com
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
___
ceph-users mailing list
ceph-users@lists.ceph.com
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
Re: [ceph-users] How to see which crush tunables are active in a ceph-cluster?
Hi Craig,
right! I had also post one mail in that thread.
My question was, if the whole step to chooseleaf_vary_r 1 take the
same amount of time like the setting tunables to firefly.
The funny thing: I just decompile the crushmap to start with
chooseleaf_vary_r 4 and see, that after upgrade tonight the
chooseleaf_vary_r allready on 1!
# begin crush map
tunable choose_local_tries 0
tunable choose_local_fallback_tries 0
tunable choose_total_tries 50
tunable chooseleaf_descend_once 1
tunable chooseleaf_vary_r 1
...
ceph osd crush show-tunables -f json-pretty
{ choose_local_tries: 0,
choose_local_fallback_tries: 0,
choose_total_tries: 50,
chooseleaf_descend_once: 1,
profile: firefly,
optimal_tunables: 1,
legacy_tunables: 0,
require_feature_tunables: 1,
require_feature_tunables2: 1}
Udo
On 20.12.2014 17:53, Craig Lewis wrote:
There was a tunables discussion on the ML a few months ago, with a lot
of good suggestions. Sage gave some suggestions on rolling out (and
rolling back) chooseleaf_vary_r changes. That reminds me... I
intended to try those changes over the holidays...
Found it; the subject was ceph osd crush tunables optimal AND add new
OSD at the same time.
On Sat, Dec 20, 2014 at 3:26 AM, Udo Lembke ulem...@polarzone.de
mailto:ulem...@polarzone.de wrote:
Hi,
for information for other cepher...
I switched from unknown crush tunables to firefly and it's takes 6
hour
(30.853% degration) to finisched on our production-cluster (5
Nodes, 60
OSDs, 10GBE, 20% data used: pgmap v35678572: 3904 pgs, 4 pools, 21947
GB data, 5489 kobjects).
Should an chooseleaf_vary_r 1 (from 0) take round about the same
time
to finished??
Regards
Udo
___
ceph-users mailing list
ceph-users@lists.ceph.com
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
[ceph-users] How to see which crush tunables are active in a ceph-cluster?
Hi all, http://ceph.com/docs/master/rados/operations/crush-map/#crush-tunables described how to set the tunables to legacy, argonaut, bobtail, firefly or optimal. But how can I see, which profile is active in an ceph-cluster? With ceph osd getcrushmap I got not realy much info (only tunable choose_local_tries 0 tunable choose_local_fallback_tries 0 tunable choose_total_tries 50) Udo ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
