What is s3distcp and how does it work?
S3DistCp is an extension of DistCp that is optimized to work with AWS, particularly Amazon S3. The command for S3DistCp in Amazon EMR version 4.0 and later is s3-dist-cp, which you add as a step in a cluster or at the command line.
How do I use Apache distcp with S3?
Apache DistCp is an open-source tool you can use to copy large amounts of data. S3DistCp is an extension of DistCp that is optimized to work with AWS, particularly Amazon S3. The command for S3DistCp in Amazon EMR version 4.0 and later is s3-dist-cp, which you add as a step in a cluster or at the command line.
What is Hadoop s3distcp used for?
Hadoop is optimized for reading a fewer number of large files rather than many small files, whether from S3 or HDFS. You can use S3DistCp to aggregate small files into fewer large files of a size that you choose, which can optimize your analysis for both performance and cost.
What is s3distcp on Amazon EMR?
The S3DistCp operation on Amazon EMR can perform parallel copying of large volumes of objects across Amazon S3 buckets. S3DistCp first copies the files from the source bucket to the worker nodes in an Amazon EMR cluster. Then, the operation writes the files from the worker nodes to the destination bucket.
How do I use s3distcp in Amazon EMR?
The command for S3DistCp in Amazon EMR version 4.0 and later is s3-dist-cp, which you add as a step in a cluster or at the command line. Using S3DistCp, you can efficiently copy large amounts of data from Amazon S3 into HDFS where it can be processed by subsequent steps in your Amazon EMR cluster.
What is concatenation in s3distcp?
For example, a file concatenated into myfile.gz would be broken into parts as: myfile0.gz , myfile1.gz, etc. Specifies the behavior of S3DistCp when copying to files from Amazon S3 to HDFS which are already present. It appends new file data to existing files.