[ARROW-2427] [C++] ReadAt implementations suboptimal

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.9.0
• Fix Version/s: 0.10.0
• Component/s: C++
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/18534
• Assignee: Antoine Pitrou
• Reporter: Antoine Pitrou
• Created: 09/Apr/18 15:15
• Updated: 11/Jan/23 07:20
• Resolved: 23/Apr/18 12:49

Description

The ReadAt implementations for at least OSFile and MemoryMappedFile take the file lock and seek. They could instead read directly from the given offset, allowing concurrent I/O from multiple threads.

Issue Links

• links to: GitHub Pull Request #1867