[OAK-3329] TarMK cleanup blocks writers

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.3.8, 1.4
• Component/s: segmentmk
• Labels: cleanup gc
• Epic Link: SegmentMK revision GC
• Assignee: Michael Dürig
• Reporter: Michael Dürig
• Created: 02/Sep/15 07:06
• Updated: 16/Feb/21 09:52
• Resolved: 05/Oct/15 12:15

Description

TarMK cleanup exclusively locks the FileStore, which causes concurrent writers to block until cleanup finished. Initially cleanup was expected to be reasonably fast, however I have seen it taking dozens of minutes under certain circumstances (most likely many tar files with many small segments, aka OAK-2896).