Malcolm Matalka wrote:
If this is not the correct place to ask Hadoop + EC2 questions please
let me know.
I am trying to get a handle on how to use Hadoop on EC2 before
committing any money to it. My question is, how do I maintain a
persistent HDFS between restarts of instances. Most of the tutorials I
have found involve the cluster being wiped once all the instances are
shut down but in my particular case I will be feeding output of a
previous days run as the input of the current days run and this data
will get large over time. I see I can use s3 as the file system, would
I just create an EBS volume for each instance? What are my options?
EBS would cost you more; you'd lose the locality of storage-per-machine.
If you stick the output of some runs back into S3 then the next jobs
have no locality and higher startup overhead to pull the data down, but
you dont pay for that download (just the time it takes).
