Other

Emc IP Holding Company LLC

Gerald T Carter

David Richards

David Leimbach

Scott D Haskin

Shikhar Mall

Implementations are provided herein for non-disruptive upgrade including rollback capabilities for a distributed file system within a cluster of nodes. To continue availability of the file system to external clients during the upgrade process, nodes can be upgraded piecemeal, for example, in one implementation, one node at a time. When a node is undergoing certain stages of the upgrade process, external clients can be directed toward the remaining nodes of the file system that are not currently being upgraded, including already upgraded nodes, to perform client activity. During the upgrade process, a first subset of nodes can be running in an upgraded state while a second subset of nodes can be in a non-upgraded state, both providing access to external clients in a seamless manner. During the upgrade process, an administrator can decide to rollback any upgrades and return the distributed file system to its previous version (e.g., the version of the file system prior to starting the non-disruptive upgrade process). Hooks can be provided prior to, during, and after various stages of the upgrade or rollback process that can allow services of the distributed file system to be notified of certain events of the upgrade process, or execute service specific processes at distinct times during the upgrade process. At the conclusion of an upgrade or rollback process, the distributed file system can enter a committed state that finalizes the process and cements an upgrade or a rollback to a more permanent state.

Non-disruptive upgrade including rollback capabilities for a distributed file system operating within a cluster of nodes

Implementations are provided herein for non-disruptive upgrade including rollback capabilities for a distributed file system within a cluster of nodes. To continue availability of the file system to external clients during the upgrade process, nodes can be upgraded piecemeal, for example, in one implementation, one node at a time. When a node is undergoing certain stages of the upgrade process, external clients can be directed toward the remaining nodes of the file system that are not currently being upgraded, including already upgraded nodes, to perform client activity. During the upgrade process, a first subset of nodes can be running in an upgraded state while a second subset of nodes can be in a non-upgraded state, both providing access to external clients in a seamless manner. In one implementation, a second namespace can be established at the onset of the upgrade process that reflects the new version of the operating system. The second namespace can be maintained in parallel with the original namespace during the pendency of the upgrade and/or downgrade process. A configuration translation layer can also be established on each node of the cluster of nodes. The configuration translation layer can provide the necessary key value pair translations that allow a request made an old version node to be performed by a new version node and vice versa. At the conclusion of an upgrade or a rollback, the cluster can enter a committed state and the namespace data that is no longer needed can be expired.

Non-disruptive upgrade configuration translator

The portable marine radio mounting bracket having a resilient, V-shaped supported bracket to which a mounting plate is secured. The mounting plate has an open ended channel thereon which receives the support clip of the radio, and a pair of spaced side walls extend and diverge forwardly of the mounting flange to abut the sides of the mounted radio. The channel and side walls cooperate to resiliently lock the radio on the mounting plate, while the support bracket absorbs shocks or jolts imparted to the support bracket.

Marine radio mounting bracket

A clip-on carrying device for portable personal radios, particularly a radio of the two-way type conventionally used by police officers, firemen and the like. The carrying device includes a first radio receiving portion to which is attached an elongated belt receiving member having a hook-like portion formed thereon to prevent accidental removal of the clip from the belt. The radio receiving portion frictionally engages the outer case of the radio to securely hold the radio therein yet allowing easy removal of the radio when desired.

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Jenison, MI, United States of America

Gerald T Carter