saas asp cloud

http://kyuya079.tistory.com/36

 

Saas vs PaaS vs IaaS 
Cloud computing compares vs traditional dedicated servers or VPS/VMs.

Here's generally how they breakdown:

 

 

 

ASP, SaaS, 클라우드

애플리케이션 서비스 제공자(Application Service Provider, 줄여서 ASP)는 고가의 하드웨어, 소프트웨어를 도입하지 않고도 네트워크 인프라를 이용하여 다양한 정보화 솔루션을 사용할 수 있는 애플리케이션 임대 서비스이다.

별도의 서버, 애플리케이션을 구매, 구축하지 않을 수 있고 비용, 시간, 관리인력의 부담을 해소하며, 중소기업의 경우 선진경영 및 업무 프로세스를 쉽게 취득하면서 대기업과 대등한 업무혁신을 가능하게 하는 점 때문에 각광을 받고 있다.

웹 서비스, SOA 등의 기술을 적용하면서 서비스 기반의 소프트웨어로 발전해가고 있다. SaaS, On-demand라고 일컫는다.

 

SaaS(Software as a Service)는 기존의 ASP를 확장한 개념으로 차세대 ASP로 볼 수 있다. SaaS와 ASP는 아래와 같은 차이점이 있다.

1. SaaS는 전자상거래 관점의 사업적인 반면에 ASP는 전산 외주(아웃소싱)의 Coasian Economics에 기초한다.
2. SaaS는 불특정 다수를 대상으로 전산서비스의 제공에 중점을 두어 확장성과 고객요구사항 커스터마이즈에 중점을 둔다.
3. SaaS는 ASP의 1989년 코닥의 전산외주의 시작과는 달리 고객의 가치 창조 및 고객 요구를 맞추는데 초점이 맞추어져 있다.

최근의 성공사례로 고객 관계 관리(CRM)영역의 CRMKorea, Salesforce.com, RightNow등의 사례와 오래전부터 해왔던 회계쪽 분야가 있다. 소프트웨어를 구입하여 사용하는 개념에서 빌려사용하는 렌트의 개념은 점점 더 확산되고 중소기업 뿐만 아니라 대기업에서도 적극적인 도입을 검토 중이며 많이 사용되고 있다.

• 클라우드 컴퓨팅은 IT 관련된 기능들이 서비스 형태로 제공되는 컴퓨팅 스타일이다.
• 사용자들은 지원하는 기술 인프라스트럭처에 대한 전문 지식이 없어도 또는 제어할 줄 몰라도 인터넷으로부터 서비스를 이용할 수 있다.
• IEEE 에서는 "정보가 인터넷 상의 서버에 영구적으로 저장되고 데스크탑이나 테이블 컴퓨터, 노트북, 벽걸이 컴퓨터, 휴대용 기기 등과 같은 클라이언트에는 일시적으로 보관되는 패러다임이다." 라고 말한다.

일반적인 클라우드 컴퓨팅에서 소프트웨어와 데이터는 서버에 저장된다.

• 클라우드 컴퓨팅은 Web 2.0, SaaS(software as a service)와 같이 최근 잘 알려진 기술 경향들과 연관성을 가지는 일반화된 개념이다.

이들 개념들의 공통점은 사용자들의 컴퓨팅 요구를 만족시키기 위해 인터넷을 이용한다는 사실이다.
예로서 구글 앱스(Google Apps)가 있다.

 

 

Although there are lots of different letters you can put in front of “as a service”, there are typically three that everybody agrees about. The following picture sums these up:

In this article we will look into some of the top providers in these three areas.

Infrastructure as a Service (IaaS) providers

Amazon

One of the biggest and most well known in this category is Amazon with its Elastic Compute Cloud (EC2). It of course started out as a company selling books, CD’s and DVD’s through the internet, but they realized that a lot of their computing resources were doing nothing most of the time, just waiting for the holiday season to hit its peak. Renting this capacity to others through the internet turned out to be a very good business model. Their current portfolio is really big and diverse, which makes it a bit daunting to start using it.

Rackspace

Another big player in this area is Rackspace. They started out as a regular hosting provider, renting out space in their racks, providing managed hosting and dedicated servers. In the last year they have moved into the cloud business as well and are doing just fine. One of the things might just be that their offering is more understandable than Amazon’s and their lowest prices are a lot better as well.

Joyent

Third on our list is Joyent. This company has been delivering cloud computing services even before the term was there to describe it. Their portfolio is quite big, and it is not limited to IaaS either. They do seem to lack in public relations, because they are not as well known as the first two IaaS players.

GoGrid

Fourth on our list is GoGrid. Like the other IaaS providers, GoGrid offers virtual machines to be rented by the hour, but they also offer dedicated servers for specific tasks that tend to be slow on virtual machines, such as databases. They call this setup a hybrid cloud, but this seems to be confusing because this term is also used for a mixture of a private and a public cloud.

Terremark

The final name on our list of IaaS providers is Terremark. They target two different types of users: the type that wants to have resources available quickly without a lot of hassle, and the type that wants to have a solid and secure environment that can run enterprise applications. For the second type of user, they provide dedicated resource pools and integration with private networks.

Platform as a Service (PaaS) providers

Google

The company with probably the biggest cloud of its own, also provides cloud services in the form of PaaS.Google App Engine is a framework that allows you to build software in Python or Java that is automatically distributed and scaled as necessary on the cloud. If you have the luxury of writing new applications in one of these two languages and want to adhere to the Google way of programming, this is one to take a look at.

Microsoft

Another really big name in this area is Microsoft. With their Azure platform, they want to give Visual Studio programmers the ability to build software for the cloud as easily as for real servers in the datacenter. There are currently two types of cloud service: Windows Azure, the operating system as an online service, and SQL Azure, a fully relational cloud database solution. If you are familiar with the Microsoft development tools and want to take the cloud for a spin, this is where yo start.

Force.com

Last on our list of PaaS providers is force.com. Created by salesforce.com, the company that grew big by providing software on demand. They started out with subscription fees, but are moving to a pay-as-you-go model. Force.com is a development platform that allows users to build business applications in the cloud. If you are willing to create software that only works in the force.com cloud, this is a simple start into cloud computing.

Software as a Service (SaaS) providers

Google

First on our list is Google Apps, not because they have the widest range of applications, but because they are probably the best known for their web-based offerings. These include of course their e-mail service, calendar, document editor, spreadsheet, and some others.

Salesforce.com

Second on our list is salesforce.com. They provide CRM software on-demand and started out with subscription fees, but are moving to a pay-as-you-go model. Currently they offer two SaaS services: Sales cloud and Service cloud. The first contains accounts, contacts,  leads, quotes, etc. The second contains a customer portal, knowledge base, analytics, etc.

Zoho

Last on our list is zoho.com. This company might be less known than Google and salesforce.com, but they offer much more types of applications that you can try out for free. These include an e-mail service, document editor, presentation tool, invoicing, reporting, applicant tracking, and many more. You only start paying for these services when you want to use the more advanced features.