@techreport{haynes-nfsv4-recalldevice-02, number = {draft-haynes-nfsv4-recalldevice-02}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-haynes-nfsv4-recalldevice/02/}, author = {Thomas Haynes}, title = {{Deviceid-Scoped Layout Recall for NFSv4.2}}, pagetotal = 10, year = 2026, month = apr, day = 29, abstract = {The Parallel Network File System (pNFS) allows the metadata server to recall a layout from a client by file id, by file system id, or across all of a client's layouts. It also lets the server delete a deviceid via CB\_NOTIFY\_DEVICEID. It does not provide a mechanism for the metadata server to recall, in a single operation, all layouts that reference a specific deviceid. This document presents an extension to RFC7862 that adds a deviceid-scoped layout recall: a single CB\_LAYOUTRECALL operation recalls every layout a client holds that references a given deviceid, leaving unrelated layouts in place. Without this capability, device unavailability can trigger large volumes of failed WRITE and LAYOUTERROR traffic, and administrators lack a surgical way to retire a deviceid without disturbing layouts that reference healthy devices.}, }