high_scalability high_scalability-2014 high_scalability-2014-1654 knowledge-graph by maker-knowledge-mining
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Introduction: The introduction of cloud technologies is not a simple evolution of existing ones, but a real revolution. Like all revolutions, it changes the points of views and redefines all the meanings. Nothing is as before. This post wants to analyze some key words and concepts, usually used in traditional architectures, redefining them according the standpoint of the cloud. Understanding the meaning of new words is crucial to grasp the essence of a pure cloud architecture. << There is no greater impediment to the advancement of knowledge than the ambiguity of words. >> THOMAS REID, Essays on the Intellectual Powers of Man Nowadays, it is required to challenge the limits of traditional architectures that go beyond the normal concepts of scalability and support millions of users (What's Up 500 Million) billions of transactions per day (Salesforce 1.3 billion), five 9s of availability (99.999 AOL). I wish all of you the success of the examples cited above, but do not think that it is co
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1 This post wants to analyze some key words and concepts, usually used in traditional architectures, redefining them according the standpoint of the cloud. [sent-4, score-0.46]
2 >> THOMAS REID, Essays on the Intellectual Powers of Man Nowadays, it is required to challenge the limits of traditional architectures that go beyond the normal concepts of scalability and support millions of users (What's Up 500 Million) billions of transactions per day (Salesforce 1. [sent-7, score-0.46]
3 Infrastructure - commodity HW instead of high-end HW This is the first shocking concept to understand about the cloud architectures. [sent-14, score-0.542]
4 The largest cloud services providers like Amazon or Azure use commodity hardware so prone to breakdowns and other problems more than the traditional environments. [sent-16, score-0.558]
5 Anyway, this kind of hardware does not prevent the use of the cloud for the enterprise applications with high availability and high-performance requirements, it is simply necessary to redesign the architecture according to different criteria of resilience and distribution. [sent-17, score-0.643]
6 Scalability - dynamic instead of static The scalability is one of the important features of a good architecture design even in the traditional approach. [sent-18, score-0.481]
7 This leads to implement very stable architectures over the time and sized for the maximum load that the application or service must support. [sent-20, score-0.527]
8 Nowadays architecture is required to adapt according to the demands and be able to expand by adding new nodes or contract. [sent-23, score-0.549]
9 Availability - resiliency instead of no failure The traditional architectures consider the resources always available. [sent-26, score-0.601]
10 In the cloud, the unavailability of a resource is no longer an exceptional event due to the use of commodity HW or because of a resource, such as an application server, is not available due to a sudden and wanted downsize. [sent-28, score-0.627]
11 In the most advanced cloud architectures, there are some agents designed to generate failures deliberately in the production environments to ensure that the application is able to respond appropriately. [sent-31, score-0.482]
12 When the worker role takes over a request, it is not completely removed even if it is no longer available for processing by other worker roles. [sent-35, score-0.717]
13 In case the processing worker role does not provide feedback within a certain timeout, the worker role ended suddenly, the request appears in the queue again and it is available for another worker role. [sent-36, score-0.966]
14 Performance - decomposition and distribution instead of stress The cloud architectures are quite sensitive to performance constraints inherent in the technology itself such as the non-proximity of resources, the commodity hardware or the resource sharing. [sent-37, score-0.88]
15 Rather than strengthen a single component of the architecture, the decomposition of the architecture in different modules deployed across multiple nodes is the key to improve the performance. [sent-40, score-0.458]
16 Reliability - MTTR instead of MTBF Traditionally, the reliability of an architecture is related to the concept of the MTBF, the mean time between a failure and another, in other words, how much wider the period the more reliable the system. [sent-47, score-0.571]
17 Capacity Planning - scale unit planning instead of worst case planning The capacity planning in traditional architecture is designed to estimate the sizing required to support the maximum load so that the system is able to respond well enough even in the worst situations. [sent-54, score-1.093]
18 In contrast, the capacity planning in the cloud architecture is oriented to determine the scale unit, i. [sent-56, score-0.553]
19 We have seen how cloud architectures diverge from everything done in the past because it is necessarily respond to different scenarios. [sent-59, score-0.521]
20 Many of the approaches used in the past are no longer usable and the fundamental concepts underlying architectures such as scalability, performance, reliability, and capacity planning are deeply reviewed. [sent-60, score-0.681]
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