Revision e4d31268

b/Ganeti/HTools/Cluster.hs
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                  , "free_disk_cv"
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                  , "n1_score"
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                  , "reserved_mem_cv"
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                  , "offline_score"
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                  , "offline_all_cnt"
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                  , "vcpu_ratio_cv"
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                  , "cpu_load_cv"
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                  , "mem_load_cv"
......
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        res_l = map Node.pRem nodes
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        -- metric: reserved memory covariance
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        res_cv = varianceCoeff res_l
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        offline_inst = sum . map (\n -> (length . Node.pList $ n) +
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                                        (length . Node.sList $ n)) $ offline
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        online_inst = sum . map (\n -> (length . Node.pList $ n) +
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                                       (length . Node.sList $ n)) $ nodes
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        -- metric: ratio of instances on offline nodes
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        off_score = if offline_inst == 0
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                    then 0::Double
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                    else fromIntegral offline_inst /
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                         fromIntegral (offline_inst + online_inst)::Double
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        -- offline instances metrics
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        offline_ipri = sum . map (length . Node.pList) $ offline
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        offline_isec = sum . map (length . Node.sList) $ offline
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        -- metric: count of instances on offline nodes
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        off_score = fromIntegral (offline_ipri + offline_isec)::Double
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        cpu_l = map Node.pCpu nodes
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        -- metric: covariance of vcpu/pcpu ratio
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        cpu_cv = varianceCoeff cpu_l

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