[jira] [Resolved] (SINGA-107) Error from loading pre-trained params for training stacked RBMs

["Sheng Wang (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SINGA-107?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sheng Wang resolved SINGA-107.
------------------------------
    Resolution: Fixed
      Assignee: ZHAOJING

> Error from loading pre-trained params for training stacked RBMs
> ---------------------------------------------------------------
>
>                 Key: SINGA-107
>                 URL: https://issues.apache.org/jira/browse/SINGA-107
>             Project: Singa
>          Issue Type: Bug
>            Reporter: ZHAOJING
>            Assignee: ZHAOJING
>
> When Params are loaded from checkpoint files, their version numbers will be reset to 0 for fine-tuning as explained in the comments of SINGA-42.
> However, if these parameters are not fine-tuned (For example, in https://github.com/apache/incubator-singa/tree/master/examples/rbm, in RBM2, the parameters from RBM1 are not updated), then these parameters' versions would be 0 when they are dumped into the checkpoint files. When these parameters are loaded again for training other models, their versions are 0, hence they should be initialized again according to SINGA-42. In other words, the pre-training is useless.
> Currently solution is loading the checkpoint file where each Param is first dumped, so that the latter (correct) Param can override the in-correct Param. Consequently, the version number will not be 0.
> For example, in https://github.com/apache/incubator-singa/tree/master/examples/rbm/rbm3.conf , we configure the checkpoint files as:
> checkpoint_path: "examples/rbm/rbm2/checkpoint/step6000-worker0"
> checkpoint_path: "examples/rbm/rbm1/checkpoint/step6000-worker0"
> in order to load w1 and b12 correctly.



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