Steve Loughran created HADOOP-14402:
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Summary: roll out StreamCapabilities across output streams of all
filesystems
Key: HADOOP-14402
URL: https://issues.apache.org/jira/browse/HADOOP-14402
Project: Hadoop Common
Issue Type: Improvement
Components: fs, fs/adl, fs/azure, fs/oss, fs/s3, fs/swift
Affects Versions: 3.0.0-alpha3
Reporter: Steve Loughran
HDFS-11644 added a way to probe streams for capabilities, with dfsoutput stream
implementing some.
We should roll this out to all our output streams, with capabilities to define
* is metadata in sync with flushed data (HDFS: no)
* does LocalFileSystem really do a sync/flush (as I don't think any subclass of
ChecksumFS does, so {{FSOutputSummer}} should declare this in its capabilities
* are intermediate writes visible *at all*?
* Is close() potentially a long operation (for object stores, yes, on a
case-by-case basis)
We'll need useful names for these options, obviously, tests, etc etc
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