International Business Machines Corporation

Charles L Emig, Ii

Jim C Chen

Shuang Hong Wang

Margaret Rose Fenlon

Justin C Nelson

Robert J Traff

A role mutable file system provides high availability processing of network requests with systems that can seamlessly switch between server and client operational roles. The file system includes a replicated storage pool associated with each server/client system where only the storage pool of the system in the server role is active. A role mutable file system (RMFS) manager on each system seamlessly switches roles between server and client to service network requests from either system to prevent interruption of service to system users.

Role mutable file system

A mutation coordinator processes in-flight file operations in a role mutable file system to provide high availability data storage and uninterrupted network request processing. The mutation coordinator uses a container with data received from in-flight operations as they progress past checkpoints to enable the file system to seamlessly mutate between server and client operational roles. The checkpoint functions determine whether the operation should halt at the checkpoint when a mutation begins and log information in the container to reflect the progress of the operation. The halted operations are then completed on the new server when the mutation is complete.

Growing community of inventors

Spring Valley, MN, United States of America

Charles L Emig, Ii