[jira] [Created] (SPARK-10340) Use S3 bulk listing for S3-backed Hive tables

["Cheolsoo Park (JIRA)" <ji...@apache.org>]

Cheolsoo Park created SPARK-10340:
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             Summary: Use S3 bulk listing for S3-backed Hive tables
                 Key: SPARK-10340
                 URL: https://issues.apache.org/jira/browse/SPARK-10340
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 1.4.1, 1.5.0
            Reporter: Cheolsoo Park


AWS S3 provides bulk listing API. It takes the common prefix of all input paths as a parameter and returns all the objects whose prefixes start with the common prefix in blocks of 1000.

Since SPARK-9926 allow us to list multiple partitions all together, we can significantly speed up input split calculation using S3 bulk listing. This optimization is particularly useful for queries like {{select * from partitioned_table limit 10}}.

This is a common optimization for S3. For eg, here is a [blog post|http://www.qubole.com/blog/product/optimizing-hadoop-for-s3-part-1/] from Qubole on this topic.



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