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RFC 9766: Extensions for Weak Cache Consistency in NFSv4.2's Flexible File Layout

In plain English — editorial summary, not part of the RFC

This document specifies extensions to NFSv4.2 for improving Weak Cache Consistency (WCC). These extensions introduce mechanisms that ensure partial writes performed under a Parallel NFS (pNFS) layout remain coherent and correctly tracked. The solution addresses concurrency and data integrity concerns that may arise when multiple clients write to the same file through separate data servers. By defining additional interactions among clients, metadata servers, and data servers, this specification enhances the reliability of NFSv4 in parallel-access environments and ensures consistency across diverse deployment scenarios.

Document record

Document ID
RFC9766
Published
April 2025
Authors
T. Haynes; T. Myklebust
Status
PROPOSED STANDARD
Stream
IETF
Area
wit
Pages
11
Also known as
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The document record above — title, authors, date, status, stream, area, relationships, DOI and errata — is imported verbatim from the public RFC Editor index. The “in plain English” section is editorial: written by The metasystema editorial team, not part of the RFC. Where the two differ, the RFC text governs.

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canonical URL: /rfc/9766-extensions-for-weak-cache-consistency-in-nfsv4-2-s-flexible-file-layout