[TEZ-1786] Support for speculation of slow tasks

• Type: New Feature
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Assignee: Bikas Saha
• Reporter: Bikas Saha
• Created: 18/Nov/14 19:36
• Updated: 06/Sep/17 20:48

Description

Umbrella jira to track speculation of attempts to mitigate stragglers

Sub-Tasks

• Support MR like speculation capabilities based on latency deviation from the mean: Closed
• Counters for speculation: Closed
• Test allowing vertex level disabling of speculation: Closed
• Move speculator processing off the central dispatcher: Closed
• Turn on speculation by default: Open
• Speculative attempt should not have the original attempts machine in its preferred locations: Resolved
• Speculation should consider if the task has received all input events: Open