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From "Pi Song (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-157) Add types and rework execution pipeline
Date Wed, 07 May 2008 14:42:57 GMT

    [ https://issues.apache.org/jira/browse/PIG-157?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12594925#action_12594925
] 

Pi Song commented on PIG-157:
-----------------------------

Good to see people start writing ideas to Wiki!!

1) First concern is that using Hadoop Local will tie us to Hadoop too much.
There was an initiative quite a while ago to start looking at different backends other than
Hadoop (e.g. we might be running a backend like SETI@home. Who knows?).

However, this whole thing seems to have been built for solely Hadoop anyway. Not sure about
the current direction.

2) Have you tried to measure LocalHadoop startup time compared to the local engine? If the
LocalHadoop takes much more time to startup, we might  suffer when processing nested queries.

> Add types and rework execution pipeline
> ---------------------------------------
>
>                 Key: PIG-157
>                 URL: https://issues.apache.org/jira/browse/PIG-157
>             Project: Pig
>          Issue Type: New Feature
>          Components: impl
>            Reporter: Alan Gates
>            Assignee: Alan Gates
>         Attachments: Core.patch.zip, exceptions.patch, incr1.zip
>
>
> This is the tracking bug for the work to add types to pig and rework the execution pipeline.
 Individual components of this work are covered in subtasks.
> Functional and design specs for this work are:
> http://wiki.apache.org/pig/PigTypesFunctionalSpec
> http://wiki.apache.org/pig/PigTypesDesign
> http://wiki.apache.org/pig/PigExecutionModel
> This work is being done on the branch types, since it is large and disruptive, and we
want to be able to do incremental checkins without causing issues for the trunk.

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