[LU-18529] FLSOM: Strict SOM for closed files

• Type: Improvement
• Resolution: Duplicate
• Priority: Minor
• Severity: 3
• Assignee: Patrick Farrell
• Reporter: Patrick Farrell

Description

This ticket is for a possible feature called "file level SOM", which would use the file level replication layout IO control mechanisms to allow strict SOM for files not being actively written.

This would apply the SOM after last close, using the FLR mechanisms to avoid the issues with evicted clients which normally prevent safe use of SOM.

It's not clear if this would offer enough performance benefit to be worth the engineering effort, so the first step will be some benchmarking.

Issue Links

• duplicates: LU-11962 File LSOM updates to store proper size via FLR for regular stat() usage
• duplicates: LU-14461 Convert LSOM with loose size consistency into a strong consistent version