Ceph

Bug #16481

Updated by Vikhyat Umrao almost 8 years ago

`$ceph osd crush tunable hammer` is NOT setting tunable profile to "hammer" and    "straw_calc_version": 1 

 <pre> 
 # ceph osd crush tunables hammer 

 # 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": 1, 
     "straw_calc_version": 0, <-------------------- 
     "allowed_bucket_algs": 54, 
     "profile": "unknown", <-------------------- 
     "optimal_tunables": 0, 
     "legacy_tunables": 0, 
     "require_feature_tunables": 1, 
     "require_feature_tunables2": 1, 
     "require_feature_tunables3": 1, 
     "has_v2_rules": 1, 
     "has_v3_rules": 0, 
     "has_v4_buckets": 1 
 } 
 </pre> <\pre> 

 - Earlier I thought this could be a cosmetic bug not only setting the profile name but internally it has set the tunable to hammer. 

 <pre> 
 # ceph osd crush tunables optimal 
 adjusted tunables profile to optimal 

 # 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": 1, 
     "straw_calc_version": 1, <------------------- 
     "allowed_bucket_algs": 54, 
     "profile": "hammer", <------------------- 
     "optimal_tunables": 0, 
     "legacy_tunables": 0, 
     "require_feature_tunables": 1, 
     "require_feature_tunables2": 1, 
     "require_feature_tunables3": 1, 
     "has_v2_rules": 1, 
     "has_v3_rules": 0, 
     "has_v4_buckets": 1 
 } 
 </pre> <\pre> 

 - But I have cross verified with setting *optimal* tunable and directly giving *hammer* tunable name has a difference which is nothing but as given in $subject. 
 "$ceph osd crush tunable hammer is NOT setting tunable profile to "hammer" and    "straw_calc_version" to 1"

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