Cloud computing이란?

What is Cloud computing? 

 

 the on-demand delivery of IT resources and applications through the internet with pay-as-you-go pricing.  

 

on-demand delivery  

indicates AWS resources you need when you need them.  

You don't have to tell us in advance that you're going to need them.  

Just start using the storage you need, when you need it.  

The flexibility is just not possible when you're managing your own data centers (데이'라 쌔'너스) 

IT resources 

the idea of IT resources is a big part of AWS philosophy.  

Why AWS has so many products? 

the answer is really simple. because businesses need them.  

 

If there are IT elements that are common across a number of businesses then this is not a differentiator.  

Take a MySQL(마이씨퀄) database is an example.  

The way you build your tables and manage the structures absolutely seperates you from the competition. but install the MySQL engine? Engine is just engine.  

 

Undifferentiated heavy lifting of IT 

Tasks that are common, often repetitive and ultimately time-consuming;  

These are the tasks AWS wants to help you with.  

So you can focus on what makes you unique.  

 

Over the Internet  

you can access those resources using a secure web page console or programmatically.  

 

Pay-as-you-go pricing 쓴만큼 만 냄 

 

영어단어  

• flexibility (플렉스빌'리리)  

• a number of = some 얼마간의  

• differentiator (디퍼런'시에이러) 구분하는 것 

• differentiated (디퍼런'시에잇) 차별화된 

• heavy lifting : a burdensome or laborious duty. 

• repetitive(르,페'르르ㅂ) 

• ultimately (얼'트므리) 

• consuming(컨슈밍) 

• internet(이'너넷) 

 

 

Cloud Computing Deployment Model  

AWS offers 3 cloud deployment models. 

1 cloud-based deployment 

• Run all parts of the application in the cloud 

• Migrate existing applications to the cloud.

• Design and build new application in the cloud. 

You can build those applications on low-level infrastructure that requires your IT staff to manage them. Alternatively, you can build them using higher-level services that reduce the management, architecting, and scaling requirements of the core infrastructure.  

ex) a company might create an application consisting of virtual servers, databases, and networking components that are fully based in the cloud.  

 

2 on-premises deployment (a private cloud deployment) 

• deploy resources by using virtualization and resource management tool.  

• increase resource utilization by using application management and virtualization technologies.  

• in this model, resources are deployed on premises by using virtualzation and resource management tools.  

 

for example, you might have applications that run on technology that is fully kept in your on-premises data center.  

Though this model is much like legacy IT infrastructure, its incorporation of application management and virtualization technologies helps to increase resource utilization.  

 

온프레미스 클라우드는 내부 프라이빗 클라우드라고도 부르며. 사내에서 프라이빗 클라우드를 호스팅하는 방식을 말합니다. 이 방식을 이용하면 유연성이 개선되고 클라우드 서버를 완벽하게 제어할 수 있습니다. 그러나 서버와 기타 하드웨어의 프로비저닝 및 유지보수 비용과 소프트웨어 라이선스 지불 비용이 증가하는 단점이 있습니다. 

 

3 hybrid deployment 

connect infrastructure and applications between cloud-based resources and existing resources that are not in the cloud, such as on-premises infrastructure. However, a hybrid deployment is not equivalent to an on-premises deployment bz it involves resources that are located in the cloud.  

Integrate cloud-based resources with legacy IT applications. 

 

if you have legacy applications that are better maintained on premises, or government regulations require your business to keep certain records on premises.  

 

 

영어단어  

• migrate(마이그레이ㅌ) 이주하다 옮기다 

• alternatively (얼, ㅊ터너티블리) 그대신에, 그렇지 않으면 

• utilization(유를리제이'션) 이용, 활용 

• integrate (인'티그레이ㅌ) 둘 이상을 하나로 합치다  

• premises(프레'미시스) 회사건물에 딸리 부지, 지역. 구내. 

• Legacy: 지금도 쓰긴하지만 오래된  

• Deploy: 효율적 방법으로 배치하다. 

• resource: 자원, 재료  

• incorporation: 전체의 일부로 포함됨. 합병  

 

Benefits of Cloud Computing 

1 Trade upfront expense for variable expense  

upfront expense: data centers, physical servers,  

varialbe expense: only pay as you use 

2 Stop spending money to run and maintain data centers 

3 Stop guessing capacity 

you don't need to predict how much infrastructure capacity you will need before deploying an application.  

4 Benefit from massive economies of scale 

usage from hundreds of thousands of customers can aggregate in the cloud, providers, such as AWS, can acheive higher economies of scales.  

The economy of scale translates into lower pay-as-you-go prices.  

5 Increase speed and agility 

When computing in data centers, it may take  weeks to obtain new resources that you need. The flexibility of cloud computing makes it easier for you to develop and deploy applications.  

6 Go global in minute. 

 

 

영어단어 

• address (어드,레'스) (문제에) 관심을 갖다, 다루다.  

• upfront 선불의, 솔직한 

• variable(베'리어블) 변경할 수 있는 

• economy(이커'너미) C 절약,아끼기  

• aggregate(애'그리겟) 합계, 종합한  

• agility (어쥘'러리) 민첩함, 영민함 

• latency(레잇, 은, 씨) 숨어있음, 잠복, 보이지 않음  

• low latency 저지연  

• provision (프르,비'젼) 공급,제공/ 대비,준비  

• the scale of 규모의  

• usage(유'쎄지) 사용됨, 사용량 

• deploy: use sth, sb in an effective way. 

하이브리드 클라우드에 포함되는 환경의 유형은 무엇인가요? 

아래 나열된 모든 환경 중 두 가지를 결합하면 이를 "하이브리드 클라우드"라고 할 수 있습니다. 

• *퍼블릭 클라우드: 퍼블릭 클라우드는 외부 공급업체가 운영하는 클라우드 서비스로서 서버는 하나 또는 다수의 데이터 센터에 있을 수 있습니다. 퍼블릭 클라우드는 다수의 조직이 공유합니다. 가상 머신을 이용하면, 여러 회사가 개별 서버도 공유할 수 있으며, 여러 회사가 동일한 물리적 서버 내의 서버 공간을 임대하기 때문에 이를 "multi-tenant(다중테넌트)"라고 부릅니다. 

• **온프레미스 프라이빗 클라우드: 프라이빗 클라우드는 한 회사를 전담하는 데이터 센터입니다. 프라이빗 클라우드의 서버는 다른 사람의 소프트웨어, 파일, 데이터와 공유되지 않습니다. 온프레미스 프라이빗 클라우드는 외부 공급업체가 아니라 조직 자체적으로 유지 관리하고 보호합니다. 

• 호스팅 프라이빗 클라우드: 서버가 하나의 조직을 전담한다는 점에서 온프레미스 프라이빗 클라우드와 같습니다. 하지만 서버는 해당 조직 내에 있지 않음. 제삼자 공급업체가 하나 이상의 원격 데이터 센터에서 클라우드 서버를 호스팅하고 유지 관리하며, 조직은 내부 네트워크가 아니라 인터넷을 통해 클라우드에 액세스합니다. 그러나 퍼블릭 클라우드와 달리 다중 테넌트가 존재하지 않으며, 클라우드 서버를 다른 조직과 공유하는 일은 없습니다. 

• 온프레미스(레거시): 온프레미스 또는 레거시 배포는 클라우드 기술을 전혀 사용하지 않음. 대신 이 모델을 사용하는 조직은 소프트웨어 라이센스 구매, 구내의 하드웨어 설치 및 유지 관리, 직원 컴퓨터에 대한 로컬 소프트웨어 설치라는 고전적인 관행을 따릅니다. 예컨대, 직원들이 Google Docs를 사용하는 대신 자신의 컴퓨터에 설치된 Microsoft Word나 기타 프로그램을 이용하게 됩니다. 

 

 

하이브리드 클라우드와 멀티클라우드의 차이점은 무엇입니까? 

멀티클라우드 배포는 다수의 퍼블릭 클라우드를 결합하지만, 하이브리는 클라우드는 퍼블릭 클라우드와 다른 유형의 환경을 결합합니다. 사과와 오렌지를 결합하는 것입니다. 이에 비해 멀티클라우드 배포는 다양한 사과를 결합하는 것이라고 할 수 있습니다. 

직사각형 중에는 정사각형이 있지만, 모든 직사각형이 정사각형은 아니듯이, 멀티클라우드도 다수의 퍼블릭 클라우드 이외에 다수의 클라우드 환경 유형을 혼합한다면 하이브리드 클라우드가 될 수 있습니다. 반대로, 하이브리드 클라우드 배포도 다수의 퍼블릭 클라우드를 이용한다면, 멀티클라우드일 수 있습니다. 

 

하이브리드 클라우드 내에서 상이한 환경들이 어떻게 서로 통신합니까? 

하이브리드 클라우드가 잘 작동하기 위한 핵심은 떨어진 클라우드 사이의 연결입니다. 퍼블릭 클라우드, 프라이빗 클라우드, 온프레미스 인프라는 다음과 같은 다양한 방법으로 서로 연결할 수 있습니다. 

• API(Application Programming Interfaces) 

• VPN(Virtual Private Network) 

• WAN(Wide Area Networks) 

클라우드 사이에 연결이 작동하지 않는다면, 이는 하이브리드 클라우드를 이용하는 것이 아닙니다. 단순히 둘 이상의 별도 클라우드 환경을 병행으로 가동하는 것이며, 하이브리드 클라우드 배포의 장점을 누릴 수 없습니다. 

 

 

출처 

https://www.cloudflare.com/ko-kr/learning/cloud/what-is-hybrid-cloud/