International Business Machines Corporation

Justin C Nelson

Jim C Chen

Shuang Hong Wang

Margaret Rose Fenlon

Joseph P Budin

Robert J Traff

Quinton G Kramer

Charles L Emig, Ii

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.

In-flight processing of operations in a role mutable file system

A system and method for managing an ad hoc network are disclosed. A boundary for an area to be monitored is defined for the ad hoc network. A number of devices connect with each other to form the ad hoc network. Devices can enter and leave the network as they come into proximity with one of the members of the network. Data is transmitted between the members of the network. This data can include a carrier rating and a data rating about each member of the network as well as data about other devices that the transmitting device had previously come into contact with. The data held by one member about other members is stored and can later be retrieved.

Ad hoc local area network creation

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Rochester, MN, United States of America

Justin C Nelson