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Steve Loughran commented on HADOOP-15229: ----------------------------------------- * w.r.t probes for options, StreamCapabilities does that already. For checking to see if the FS does that, HADOOP-15691 is the patch there: -please review! * We already have a createFile() Call with the opt/must naming and fs spec; I'm working off that code for consistency. > Add FileSystem builder-based openFile() API to match createFile() > ----------------------------------------------------------------- > > Key: HADOOP-15229 > URL: https://issues.apache.org/jira/browse/HADOOP-15229 > Project: Hadoop Common > Issue Type: New Feature > Components: fs, fs/azure, fs/s3 > Affects Versions: 3.0.0 > Reporter: Steve Loughran > Assignee: Steve Loughran > Priority: Major > Attachments: HADOOP-15229-001.patch, HADOOP-15229-002.patch, > HADOOP-15229-003.patch, HADOOP-15229-004.patch, HADOOP-15229-004.patch, > HADOOP-15229-005.patch, HADOOP-15229-006.patch > > > Replicate HDFS-1170 and HADOOP-14365 with an API to open files. > A key requirement of this is not HDFS, it's to put in the fadvise policy for > working with object stores, where getting the decision to do a full GET and > TCP abort on seek vs smaller GETs is fundamentally different: the wrong > option can cost you minutes. S3A and Azure both have adaptive policies now > (first backward seek), but they still don't do it that well. > Columnar formats (ORC, Parquet) should be able to say "fs.input.fadvise" > "random" as an option when they open files; I can imagine other options too. > The Builder model of [~eddyxu] is the one to mimic, method for method. > Ideally with as much code reuse as possible -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-issues-h...@hadoop.apache.org