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Steve Loughran commented on HADOOP-9565: ---------------------------------------- This is what I'm thinking # Blobstore interface for {{FileSystem}} and {{AbstractFileSystem}} # blobstores to provide an instance specific enum set of consistency guarantees # a local/remote flag, so that those FSs that know when they are in-cluster (swift explicitly, s3 once it does an nslookup & sees the bucket is on a 10. address). # an optional (how to check?) copy() method that triggers a remote copy see [http://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectCOPY.html] for an example -much lower cost than a local copy. # a {{put(Path, InputStream, length)}} that can be used to do a direct PUT without having to buffer it through a local file. This would be more efficient and should offer a better way to do these uploads than hiding them in a close operation that may be having its exceptions swallowed. > Add a Blobstore interface to add to blobstore FileSystems > --------------------------------------------------------- > > Key: HADOOP-9565 > URL: https://issues.apache.org/jira/browse/HADOOP-9565 > Project: Hadoop Common > Issue Type: Sub-task > Components: fs > Affects Versions: 2.0.4-alpha > Reporter: Steve Loughran > Priority: Minor > > We can make the fact that some {{FileSystem}} implementations are really > blobstores, with different atomicity and consistency guarantees, by adding a > {{Blobstore}} interface to add to them. > This could also be a place to add a {{Copy(Path,Path)}} method, assuming that > all blobstores implement at server-side copy operation as a substitute for > rename. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira