Online SNIA Dictionary

Quad-Level Cell [Permalink]

A memory cell that stores four bits of data.

Quality of Service (QoS) [Permalink]

A technique for managing computer system resources such as data trasnfer rate by specifying user visible parameters such as message delivery time.

Policy rules are used to describe the operation of network elements to make QoS guarantees. Relevant standards for QoS in the IETF are the RSVP (Resource Reservation Protocol) and COPS (Common Open Policy Service) protocols. RSVP allows for the reservation of bandwidth in advance, while COPS allows routers and switches to obtain policy rules from a server.

quiesce [Permalink]

To bring a device or an application to a quiescent state.

quiescent state [Permalink]

An application or device state in which (a.) the application or device is able to operate, (b.) all of its data is consistent and stored on non-volatile storage, and (c.) processing has been suspended and there are no tasks in progress; i.e., all tasks have either been completed or not started.

quota [Permalink]

A limit that restricts the amount of a resource, such as disk space, that a user, group or directory structure may consume.