[LU-14521] delete FLR mirrors without volatile files

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.15.0
• Labels: bjhpflr
• Severity: 3
• Assignee: Zhenyu Xu
• Reporter: John Hammond

Description

As noted on https://review.whamcloud.com/#/c/41906/2/src/lpurge.c@765:

(suggestion) Rather than opening a volatile file just to delete the mirror, it might be useful to have some "magic" fd that just means "delete the mirror" that can be handled directly by the MDS? That would avoid at least 2 RPCs per split.