[HADOOP-18399] S3A Prefetch - SingleFilePerBlockCache to use LocalDirAllocator

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.4.0
• Fix Version/s: 3.4.0, 3.3.6
• Component/s: fs/s3
• Labels: pull-request-available
• Target Version/s: 3.4.0
• Hadoop Flags: Reviewed
• Assignee: Viraj Jasani
• Reporter: Steve Loughran
• Created: 10/Aug/22 12:46
• Updated: 28/Jan/24 00:14
• Resolved: 18/Apr/23 16:06

Description

prefetching stream's SingleFilePerBlockCache uses Files.tempFile() to allocate a temp file.

it should be using LocalDirAllocator to allocate space from a list of dirs, taking a config key to use. for s3a we will use the Constants.BUFFER_DIR option, which on yarn deployments is fixed under the env.LOCAL_DIR path, so automatically cleaned up on container exit

Issue Links

• links to: GitHub Pull Request #5054