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Posted to issues@systemml.apache.org by "Deron Eriksson (JIRA)" <ji...@apache.org> on 2016/09/16 19:15:21 UTC
[jira] [Assigned] (SYSTEMML-153) Allow input data file without
requiring corresponding metadata file
[ https://issues.apache.org/jira/browse/SYSTEMML-153?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Deron Eriksson reassigned SYSTEMML-153:
---------------------------------------
Assignee: Deron Eriksson
> Allow input data file without requiring corresponding metadata file
> -------------------------------------------------------------------
>
> Key: SYSTEMML-153
> URL: https://issues.apache.org/jira/browse/SYSTEMML-153
> Project: SystemML
> Issue Type: Improvement
> Reporter: Deron Eriksson
> Assignee: Deron Eriksson
> Fix For: Not Applicable
>
>
> Right now a metadata file is required for an input data file. For example, a matrix.csv file would typically require a matrix.csv.mtd file. Creating a .mtd manually is a minor annoyance in terms of consumability of SystemML. It would be nice if there were some mechanism so that a metadata file does not need to be provided in all cases.
> One possibility is that if no metadata file is present, SystemML could assume a particular default format (for example, a comma-separated delimited file). The number of rows and columns could be determined by parsing the file. This might work well for small files but not necessarily well for enormous files.
> A possible way to solve this would be to use a file extension to indicate that you have a small input data file and you don't want to have to provide a metadata file. For example, you could have a matrix.csv-nomtd file. The .csv part of the extension indicates that it's a csv file, and the -nomtd part of the extension indicates that you don't want to provide metadata.
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