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Posted to dev@pig.apache.org by "Dmitriy V. Ryaboy (Commented) (JIRA)" <ji...@apache.org> on 2012/01/02 02:31:30 UTC
[jira] [Commented] (PIG-2453) Fetching schema can be very slow for
multi-thousand LOADs
[ https://issues.apache.org/jira/browse/PIG-2453?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13178258#comment-13178258 ]
Dmitriy V. Ryaboy commented on PIG-2453:
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One proposed solution is to only check for .pig_schema files on a per-directory level instead of per-file. We can also probably do fewer NN calls by caching all found schema files and not checking metaFilePath.exists() redundantly.
> Fetching schema can be very slow for multi-thousand LOADs
> ---------------------------------------------------------
>
> Key: PIG-2453
> URL: https://issues.apache.org/jira/browse/PIG-2453
> Project: Pig
> Issue Type: Bug
> Reporter: Dmitriy V. Ryaboy
> Assignee: Dmitriy V. Ryaboy
>
> When a user tries to load resources with thousands of files using PigStorage, we spend an inordinate amount of time looking for schema files. This is because we check for a schema file per loaded file.
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