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From "LI Guobao (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SYSTEMML-2368) Extend scheme Overlap_Reshuffle
Date Wed, 06 Jun 2018 21:47:00 GMT
LI Guobao created SYSTEMML-2368:
-----------------------------------

             Summary: Extend scheme Overlap_Reshuffle
                 Key: SYSTEMML-2368
                 URL: https://issues.apache.org/jira/browse/SYSTEMML-2368
             Project: SystemML
          Issue Type: Sub-task
            Reporter: LI Guobao
            Assignee: LI Guobao


It aims to extend the scheme of data partition.
 * Disjoint_Random: for each worker, use a permutation multiply {{P[beg:end,] %*% X}}, where
P is constructed for example with {{P=table(seq(1,nrow(X),sample(nrow(X), nrow(X))))}}, i.e.,
sampling without replacement to ensure disjointness.
 * Overlap_Reshuffle: Similar to the above, except you create a new permutation matrix for
each worker and without the indexing on P.



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