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https://issues.apache.org/jira/browse/SYSTEMML-1915?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matthias Boehm closed SYSTEMML-1915.
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Resolution: Not A Problem
Assignee: Matthias Boehm
Fix Version/s: SystemML 1.0
marked as not a problem because with the used of shared dictionaries, the
overhead with small 1k x 1k blocks is acceptable.
> Increase default block size to 2048
> -----------------------------------
>
> Key: SYSTEMML-1915
> URL: https://issues.apache.org/jira/browse/SYSTEMML-1915
> Project: SystemML
> Issue Type: Sub-task
> Reporter: Matthias Boehm
> Assignee: Matthias Boehm
> Fix For: SystemML 1.0
>
>
> So far we use a default blocksize of 1000 x 1000. This task aims to increase
> the default blocksize to 2048 x 2048 in order to increase the default
> compression potential.
> Other advantages are reducing partial aggregation, increasing the
> applicability of physical operators with blocksize constraints, and reducing
> the overhead for ultra-sparse matrices.
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