Glossary

QNX is a real-time operating system that is frequently used in embedded systems, such as M2M systems.

The Quality of Service (QoS) Class is a classification system used by Kubernetes to organize Pods within the cluster into different classes and determine scheduling and eviction policies. When a Pod is created, its QoS Class is established based on the compute resources requests and limits specified. These classes are then utilized to determine scheduling and eviction decisions. Kubernetes has three QoS classes that a Pod can be assigned: Guaranteed, Burstable, or BestEffort.

A field with a length of 20 bits in the IPv6 packet, known as the Flow Label, allows the marking of packets for specific treatment by routers. This can include specific quality of service (QoS) characteristics such as "real-time." The goal is to treat data packets for services that require a specific level of service quality, such as video telephony, separately.

In the field of telecommunications, the defined and controllable behavior of a communication system or service refers to measurable quality parameters.

Quantities in computing refer to small or large numbers that are represented using a concise, whole-number notation with SI suffixes. This notation allows for easy representation of fractional numbers using milli units, while larger numbers can be represented using kilo, mega, or giga units. For example, 1.5 can be represented as 1500m, 1000 as 1k, and 1000000 as 1M. In addition, binary-notation suffixes can be used, such as 2Ki to represent 2048. The accepted decimal (power-of-10) units are m (milli), k (kilo, intentionally lowercase), M (mega), G (giga), T (tera), P (peta), and E (exa). The accepted binary (power-of-2) units are Ki (kibi), Mi (mebi), Gi (gibi), Ti (tebi), Pi (pebi), and Ei (exbi).

The goal of a query is to condense and retrieve structured data from different source systems with varying formats in a meaningful way. For this purpose, the commonly used query language SQL is typically employed.

Query analysis is a database process that involves using SQL to examine and optimize queries for better performance. It plays a crucial role in query processing by enhancing overall performance, resulting in faster database operations. To achieve this, a query optimizer evaluates individual query statements and generates both local and remote access plans based on the resource costs associated with each plan. The database then selects the plan that is expected to process the query with the lowest resource cost.