Yann Landrin-Schweitzer created HADOOP-12020:
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Summary: Support AWS S3 reduced redundancy storage class
Key: HADOOP-12020
URL: https://issues.apache.org/jira/browse/HADOOP-12020
Project: Hadoop Common
Issue Type: Improvement
Components: fs/s3
Affects Versions: 2.7.0
Environment: Hadoop on AWS
Reporter: Yann Landrin-Schweitzer
Amazon S3 uses, by default, the NORMAL_STORAGE class for s3 objects.
This offers, according to Amazon's material, 99.99999999% reliability.
For many applications, however, the 99.99% reliability offered by the
REDUCED_REDUNDANCY storage class is amply sufficient, and comes with a
significant cost saving.
HDFS, when using the legacy s3n protocol, or the new s3a scheme, should support
overriding the default storage class of created s3 objects so that users can
take advantage of this cost benefit.
This would require minor changes of the s3n and s3a drivers, using
a configuration property fs.s3n.storage.class to override the default storage
when desirable.
This override could be implemented in Jets3tNativeFileSystemStore with:
S3Object object = new S3Object(key);
...
if(storageClass!=null) object.setStorageClass(storageClass);
It would take a more complex form in s3a, e.g. setting:
InitiateMultipartUploadRequest initiateMPURequest =
new InitiateMultipartUploadRequest(bucket, key, om);
if(storageClass !=null ) {
initiateMPURequest = initiateMPURequest.withStorageClass(storageClass);
}
and similar statements in various places.
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