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https://issues.apache.org/jira/browse/PIG-3204?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14078971#comment-14078971
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Shiwei Guo commented on PIG-3204:
---------------------------------
Is the executeBatch() call in 'processDescribe' introduced by this patch
necessary？
Can it be replaced by:
{code}
if (mPigServer.isBatchOn()) {
mPigServer.parseAndBuild();
}
{code}
?
We have a usage case, which may be quite normal, like this:
{code}
describe aliaseA;
store aliaseA;
describe aliaseB;
store aliaseB;
describe aliaseC;
store aliaseC;
...
{code}
The 'executeBatch' call in describe make pig have no chance to execute the
store operations in parallel and do more optimize.
> Change script parsing to parse entire script instead of line by line
> --------------------------------------------------------------------
>
> Key: PIG-3204
> URL: https://issues.apache.org/jira/browse/PIG-3204
> Project: Pig
> Issue Type: Improvement
> Affects Versions: 0.10.1
> Reporter: Rohini Palaniswamy
> Assignee: Rohini Palaniswamy
> Fix For: 0.12.0
>
> Attachments: PIG-3204-1.patch, PIG-3204-2.patch, PIG-3204-3.patch,
> PIG-3204-4.patch, PIG-3204-5.patch, PIG-3204-6.patch
>
>
> Currently there are a lot of NN calls made to determine if there is a
> schema file for a path in a LOAD statement. When there is a slow NN(caused by
> whole bunch of other issues), it takes a lot of time for this and we found
> the scripts spending anywhere from 5 mins to 40 mins depending upon the
> script. It seems to be a good place for optimization.
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