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https://issues.apache.org/jira/browse/PIG-1232?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Olga Natkovich resolved PIG-1232.
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Resolution: Won't Fix
There is no active development for Zebra
> [zebra] Column Group schema file versioning
> -------------------------------------------
>
> Key: PIG-1232
> URL: https://issues.apache.org/jira/browse/PIG-1232
> Project: Pig
> Issue Type: Improvement
> Affects Versions: 0.6.0
> Reporter: Yan Zhou
> Priority: Minor
>
> This missing versioning in column group schema makes it difficult to evolve
> the index. For instance, prior to fix of PIG-1201, the index is empty for
> unsorted tables. However the index is useful even for unsorted tables to save
> a listStatus call to name node, which has been found expensive for
> directories of many disk entries inside it. As part of that fix, an index is
> built.. Without versioning but with the demand to support backward
> compatibility, another non-classical approach has to be figured out to build
> index when necessary. As part of this fix, we may also want to address that
> issue too.
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