[MESOS-2265] Introduce an os::rename abstraction to stout.

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.22.0
• Component/s: stout
• Target Version/s: 0.22.0
• Epic Link: Dynamic Reservation
• Assignee: Michael Park
• Reporter: Michael Park
• Shepherd: Jie Yu
• Created: 25/Jan/15 18:00
• Updated: 14/May/15 23:11
• Resolved: 14/May/15 21:16

Description

We introduce an os::rename abstraction to stout in order to support atomicity and validity of checkpointed files. Writing directly to the checkpoint file can leave the file in a corrupted state if either: the slave crashes while writing, or checkpointing encounters an error and the slave crashes before the partially written file is removed. We should checkpoint to a temporary file instead and use os::rename to atomically move it to the desired path.