Chad T Moore

US Patent:

20170123663, May 4, 2017

Filed:

Oct 30, 2015

Appl. No.:

14/928257

Inventors:

- Sunnyvale CA, US
Tom Snyder - Pittsburgh PA, US
Chad Moore - Pittsburgh PA, US

Assignee:

NETAPP, INC. - Sunnyvale CA

International Classification:

G06F 3/06
G06F 11/20

Abstract:

Various embodiments are generally directed to techniques for maintaining and using a quorum of nodes within a cluster of a storage cluster system to perform coordinated operations. An apparatus includes a network interface of a node of multiple nodes of a storage cluster system to receive a command from another device to cause the node to become unavailable to remain within a quorum of the nodes; an update coordination component to enable one node at a time to have authority to update node status data, the node status data comprising indications of states of the multiple nodes; and a command evaluation component to cooperate with the update coordination component to obtain the authority, analyze the indications to determine a current status of the quorum when the node has the authority, and determine whether to accept the command based on whether unavailability of the node causes loss of the quorum.

US Patent:

20170123945, May 4, 2017

Filed:

Oct 30, 2015

Appl. No.:

14/928282

Inventors:

- Sunnyvale CA, US
Tom Snyder - Pittsburgh PA, US
Chad Moore - Pittsburgh PA, US

Assignee:

NETAPP, INC. - Sunnyvale CA

International Classification:

G06F 11/20
G06F 3/06

Abstract:

Various embodiments are generally directed to techniques for maintaining and using a quorum of nodes within a cluster of a storage cluster system to perform coordinated operations. An apparatus includes a node of multiple nodes of a storage cluster system, each node to oversee a copy of client data and a first node to serve as a tie breaker node in determinations of whether there is a quorum; a quorum coordination component to determine a current status of the quorum, and coordinate performance of a coordinated operation among the multiple nodes to alter the copies of the client data based on the current status of the quorum; and a tie breaker reassignment component to analyze the indications to determine whether the first node has failed and reassign the tie breaker node from the first node to a second node in response to a determination that the first node has failed.