Concepts inPaxos Quorum Leases: Fast Reads Without Sacrificing Writes

Paxos (computer science)

Paxos is a family of protocols for solving consensus in a network of unreliable processors. Consensus is the process of agreeing on one result among a group of participants. This problem becomes difficult when the participants or their communication medium may experience failures. Consensus protocols are the basis for the state machine approach to distributed computing, as suggested by Leslie Lamport and surveyed by Fred Schneider.  more from Wikipedia

Low latency

Low latency allows human-unnoticeable delays between an input being processed and the corresponding output providing real time characteristics. This can be especially important for internet connections utilizing services such as online gaming and VOIP. VOIP is tolerant to some degree of latency since a minor delay between input from conversation participants is generally attributable to non-technical issues, but substantial delays may impair communication.  more from Wikipedia

Amazon Elastic Compute Cloud

Amazon Elastic Compute Cloud (EC2) is a central part of Amazon. com's cloud computing platform, Amazon Web Services (AWS). EC2 allows users to rent virtual computers on which to run their own computer applications. EC2 allows scalable deployment of applications by providing a Web service through which a user can boot an Amazon Machine Image to create a virtual machine, which Amazon calls an "instance", containing any software desired.  more from Wikipedia

Speed of light

The speed of light in vacuum, usually denoted by c, is a universal physical constant important in many areas of physics. Its value is 299,792,458 metres per second, a figure that is exact since the length of the metre is defined from this constant and the international standard for time. In imperial units this speed is approximately 186,282 miles per second. According to special relativity, c is the maximum speed at which all energy, matter, and information in the universe can travel.  more from Wikipedia

Latency (engineering)

Latency is a measure of time delay experienced in a system, the precise definition of which depends on the system and the time being measured. Latencies may have different meaning in different contexts.  more from Wikipedia

Throughput

In communication networks, such as Ethernet or packet radio, throughput or network throughput is the average rate of successful message delivery over a communication channel. This data may be delivered over a physical or logical link, or pass through a certain network node. The throughput is usually measured in bits per second (bit/s or bps), and sometimes in data packets per second or data packets per time slot.  more from Wikipedia

Data center

A data center or data centre or computer centre (also datacenter or datacentre) is a facility used to house computer systems and associated components, such as telecommunications and storage systems. It generally includes redundant or backup power supplies, redundant data communications connections, environmental controls (e.g. , air conditioning, fire suppression) and security devices.  more from Wikipedia