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From "Aryan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SQOOP-1390) Import data to HDFS as a set of Parquet files
Date Sun, 02 Nov 2014 18:36:34 GMT

    [ https://issues.apache.org/jira/browse/SQOOP-1390?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14193947#comment-14193947
] 

Aryan commented on SQOOP-1390:
------------------------------

I have cloned sqoop project from git hub : https://github.com/apache/sqoop and build it in
windows 7 using build.xml using ant to create a sqoop-1.4.6-SNAPSHOT.jar and deployed it in
/usr/lib/sqoop in cdh5 environment but when I run sqoop import command I get the following
error in stack trace :

Exception in thread "main" java.lang.NoClassDefFoundError: org/kitesdk/data/mapreduce/DatasetKeyOutputFormat
	at org.apache.sqoop.mapreduce.DataDrivenImportJob.getOutputFormatClass(DataDrivenImportJob.java:179)
Am I doing anything wrong? is using windows for building the project wrong, do I need to add
additional jars ? 

1. I have deployed all kite sdk jars in sqoop/lib.
2. Added kite sdk to hadoop_classpath.




> Import data to HDFS as a set of Parquet files
> ---------------------------------------------
>
>                 Key: SQOOP-1390
>                 URL: https://issues.apache.org/jira/browse/SQOOP-1390
>             Project: Sqoop
>          Issue Type: Sub-task
>          Components: tools
>            Reporter: Qian Xu
>            Assignee: Qian Xu
>             Fix For: 1.4.6
>
>         Attachments: SQOOP-1390.patch
>
>
> Parquet files keep data in contiguous chunks by column, appending new records to a dataset
requires rewriting substantial portions of existing a file or buffering records to create
a new file. 
> The JIRA proposes to add the possibility to import an individual table from a RDBMS into
HDFS as a set of Parquet files. We will also provide a command-line interface with a new argument
{{--as-parquetfile}} 
> Example invocation: 
> {{sqoop import --connect JDBC_URI --table TABLE --as-parquetfile --target-dir /path/to/files}}
> The major items are listed as follows:
> * Implement ParquetImportMapper
> * Hook up the ParquetOutputFormat and ParquetImportMapper in the import job.
> * Be able to support import from scratch or in append mode
> Note that as Parquet is a columnar storage format, it doesn't make sense to write to
it directly from record-based tools. So we'd consider to use Kite SDK to simplify the handling
of Parquet specific things.



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