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  1. Spark
  2. SPARK-20805

updated updateP in SVD++ is error

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Incomplete
    • Affects Version/s: 1.6.1, 2.1.1
    • Fix Version/s: None
    • Component/s: GraphX
    • Labels:

      Description

      In algorithm svd++, we all known that the usr._2 store the value of pu + |N(u)|^(-0.5)*sum; the function sendMsgTrainF compute the updated value of updateP,updateQ and updateY. At the beginning,the cycle iteration update the part of y in usr._2, but pu is never updated. so we should fix the
      sendMessageToSrcFunction in sendMsgTrainF. the old code is ctx.sendToSrc((updateP, updateY, (err - conf.gamma6 * usr._3) * conf.gamma1)). if we fix like that ctx.sendToSrc((updateP, updateP, (err - conf.gamma6 * usr._3) * conf.gamma1)), it maybe arrive the effect we want.

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            • Assignee:
              Unassigned
              Reporter:
              BoLing BoLing
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              • Created:
                Updated:
                Resolved: