steveloughran opened a new pull request, #7732:
URL: https://github.com/apache/hadoop/pull/7732
### Description of PR
* Lets you turn off checksumming in local fs (but not hdfs!) with option
`file.verify-checksum`
* Has copy of Parquet's `TrackingByteBufferAllocator`, modified for Hadoop
APIs and named
`TrackingByteBufferPool`; not yet used in tests.
* New capability "fs.capability.vectoredio.sliced" to declare that you slice
buffers.
### How was this patch tested?
no tests yet.
### For code changes:
- [X] Does the title or this PR starts with the corresponding JIRA issue id
(e.g. 'HADOOP-17799. Your PR title ...')?
- [ ] Object storage: have the integration tests been executed and the
endpoint declared according to the connector-specific documentation?
- [ ] If adding new dependencies to the code, are these dependencies
licensed in a way that is compatible for inclusion under [ASF
2.0](http://www.apache.org/legal/resolved.html#category-a)?
- [ ] If applicable, have you updated the `LICENSE`, `LICENSE-binary`,
`NOTICE-binary` files?
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