[LU-16837] interop: client skip unknown component mirror

• Type: Improvement
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.16.0
• Labels: compression
• Severity: 3
• Assignee: Zhenyu Xu
• Reporter: Zhenyu Xu

Description

If the client encounters unknown components in a FLR file, it should skip the mirror to choose another known mirror for read/write.

This provides some forward compatibility for clients accessing mirrored files - they can always read files that have at least one "known" mirror, even if there are other "unknown" mirrors (e.g. compressed, EC, PCC/HSM with some unknown type, etc.).

Issue Links

• is related to: LU-19481 FLR-EC: Basic do-no-harm lov IO support
• is related to: LU-19520 FLR-EC: Don't read parity components on old clients
• is related to: LU-19562 FLR-EC: Add connect flag support and enable/disable
• is related to: LU-10911 FLR2: Erasure coding
• is related to: LU-10026 Client-side data compression
• is related to: LU-10606 HSM info as part of LOV layout xattr