Contributed by Ben Roling.
S3Guard will now track the etag of uploaded files and, if an S3
bucket is versioned, the object version.
You can then control how to react to a mismatch between the data
in the DynamoDB table and that in the store: warn, fail, or, when
using versions, return the original value.
This adds two new columns to the table: etag and version.
This is transparent to older S3A clients -but when such clients
add/update data to the S3Guard table, they will not add these values.
As a result, the etag/version checks will not work with files uploaded by older clients.
For a consistent experience, upgrade all clients to use the latest hadoop version.
This is the first step for on-demand operations: things recognize when they are using on-demand tables,
as do the tests.
Contributed by Steve Loughran.
This is needed to fix up some confusion about caching of job.addCache() handling of S3A paths; all parent dirs -the files are downloaded by the NM without using the DTs of the user submitting the job. This means that when you submit jobs to an EC2 cluster with lower IAM permissions than the user, cached resources don't get downloaded and the job doesn't start.
Production code changes:
* S3AFileStatus Adds "true" to the superclass's encrypted flag during construction.
Tests
* Base AbstractContractOpenTest can control whether zero byte files created in tests are encrypted. Not done via an XML attribute, just a subclass point. Thoughts?
* Verify that the filecache considers paths to not have the permissions which trigger reduce-privilege downloads
* And extend ITestDelegatedMRJob to test a completely different bucket (open street map), to verify that cached resources do get their tokens picked up
Docs:
* Advise FS developers to say all files are encrypted. It's otherwise harmless and it'll stop other people seeing impossible to debug error messages on app launch.
Contributed by Steve Loughran.
Change-Id: Ifaae4c9d735ccc5eafeebd2584b65daf2d4e5da3
Contributed by Steve Loughran.
This includes
- HADOOP-15890. Some S3A committer tests don't match ITest* pattern; don't run in maven
- MAPREDUCE-7090. BigMapOutput example doesn't work with paths off cluster fs
- MAPREDUCE-7091. Terasort on S3A to switch to new committers
- MAPREDUCE-7092. MR examples to work better against cloud stores
S3A to implement S3 Select through this API.
The new openFile() API is asynchronous, and implemented across FileSystem and FileContext.
The MapReduce V2 inputs are moved to this API, and you can actually set must/may
options to pass in.
This is more useful for setting things like s3a seek policy than for S3 select,
as the existing input format/record readers can't handle S3 select output where
the stream is shorter than the file length, and splitting plain text is suboptimal.
Future work is needed there.
In the meantime, any/all filesystem connectors are now free to add their own filesystem-specific
configuration parameters which can be set in jobs and used to set filesystem input stream
options (seek policy, retry, encryption secrets, etc).
Contributed by Steve Loughran
