Commit d6be0775 authored by Iustin Pop's avatar Iustin Pop
Browse files

Add two new variables in the cluster score

This patch adds two new variables to the cluster score:
  - variance of the failN1 attribute
  - variance of the reserved memory percentage

The variance of the failN1 helps make the cluster N+1 happy, whereas the
reserved memory percentage helps balance the unused memory for
redundancy on the nodes.
parent dfc749e6
......@@ -572,7 +572,7 @@ printNodes ktn nl =
in unlines $ map (uncurry helper) snl'
-- | Compute the mem and disk covariance.
compDetailedCV :: NodeList -> (Double, Double)
compDetailedCV :: NodeList -> (Double, Double, Double, Double)
compDetailedCV nl =
nodes = Container.elems nl
......@@ -580,18 +580,23 @@ compDetailedCV nl =
dsk_l = map Node.p_dsk nodes
mem_cv = varianceCoeff mem_l
dsk_cv = varianceCoeff dsk_l
in (mem_cv, dsk_cv)
n1_l = map (\n -> if Node.failN1 n then 1 else 0) nodes
n1_cv = varianceCoeff n1_l
res_l = map Node.p_rem nodes
res_cv = varianceCoeff res_l
in (mem_cv, dsk_cv, n1_cv, res_cv)
-- | Compute the 'total' variance.
compCV :: NodeList -> Double
compCV nl =
let (mem_cv, dsk_cv) = compDetailedCV nl
in mem_cv + dsk_cv
let (mem_cv, dsk_cv, n1_score, res_cv) = compDetailedCV nl
in mem_cv + dsk_cv + n1_score + res_cv
printStats :: NodeList -> String
printStats nl =
let (mem_cv, dsk_cv) = compDetailedCV nl
in printf "mem=%.8f, dsk=%.8f" mem_cv dsk_cv
let (mem_cv, dsk_cv, n1_score, res_cv) = compDetailedCV nl
in printf "f_mem=%.8f, r_mem=%.8f, f_dsk=%.8f, n1=%.3f"
mem_cv res_cv dsk_cv n1_score
-- Balancing functions
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