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Posted to issues@systemml.apache.org by "LI Guobao (JIRA)" <ji...@apache.org> on 2018/06/18 09:46:00 UTC

[jira] [Closed] (SYSTEMML-2368) Extend scheme Overlap_Reshuffle

     [ https://issues.apache.org/jira/browse/SYSTEMML-2368?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

LI Guobao closed SYSTEMML-2368.
-------------------------------

> 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
>            Priority: Major
>             Fix For: SystemML 1.2
>
>
> 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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