Link Weights

Link weights are used by PhEDEx to make transfer decisions. The link priority is higher if the link weight number is smaller.

destination T0_CH_CERN_Export (Buffer)

  • source T1_Buffer: R/4
  • source T1_Disk: R/1
  • source T2_regional: R/2
  • source T2_non-regional: R/3
  • source T3: R/5

destination T1_Buffer

  • "Buffer"<-->"MSS": L/1
  • source T0_Buffer: R/1
  • source other T1_Buffer: R/4
  • source T1_Disk: R/1
  • source T2_regional: R/2
  • source T2_non-regional: R/3
  • source T3: R/5

destination T1_Disk

  • source T0_Buffer: R/4
  • source other T1_Buffer: R/4 (using Buffer for links creation)
    • Source is the same T1 as the T1_Disk, weight is also 4. Because we want that PhEDEx prefers transferring through the network instead of staging from tape
  • source T1_Disk: R/1
  • source T2_regional: R/2
  • source T2_non-regional: R/3
  • source T3: R/5

destination T2

  • source T1_Buffer: R/4
  • source T1_Disk: R/1
  • source T2_regional: R/2
  • source T2_non-regional: R/3
  • source T3: R/5

destination T3

  • source T1_Buffer: R/4
  • source T1_Disk: R/1
  • source T2_regional: R/2
  • source T2_non-regional: R/3
  • source other T3: R/5

Simplified Version

Source/Destionation Distance
Buffer <--> MSS 1
T0 Export(Buffer) -> T1_Buffer 1
(T0/T1)Buffer -> * 4
T1_Disk -> * 1
T2 Regional -> * 2
T2 Non-regional -> * 3
T3 -> * 5
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Topic revision: r3 - 2014-04-08 - MericTaze
 
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