[KUDU-374] Tablet startup should not eagerly open every CFile

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: M4.5
• Component/s: fs, tablet
• Labels: scalability
• Target Version/s: M5
• Assignee: Adar Dembo
• Reporter: Todd Lipcon
• Created: 25/Jun/14 18:38
• Updated: 26/Feb/16 13:53
• Resolved: 19/Apr/15 19:05

Description

Currently when the tablet opens, it opens every cfile and delta block to read their headers. This causes a ton of random IO, such that a 100GB tablet takes about 30 minutes to open when not well buffer-cached due to all the random IO. This is obviously untenable

Issue Links

• is related to: KUDU-423 Implement scalable and performant on-disk storage