When we work with AWS, then we can use S3 (simple storage service). Is HDFS useless in this case because you can instead use S3 or is there anything which HDFS can provide but we cannot do that using S3? Thanks.
Yes, that's right. Thanks. What I meant is that in case when one is already using AWS one would automatically have access to S3. So one would install Hadoop and get access to HDFS only if one seeks something that S3 cannot give it.