Redhat has two major Linux product series. One is the free Fedora Core series, which is mainly used in the desktop version and provides support for more new features. Another product series is the charged Enterprise series, which is divided into: AS/ES/WS and other branches, they are all redhat enterprise Linux, referred to as RHEL
AS
It is the Advanced Server version. On the basis of the standard Linux kernel, it has made performance enhancements and improved reliability. It integrates many common server drivers. It can easily identify the disk array cards and other equipment of common rack servers such as IBM/DELL/HP.
Typical AS applications are:
1. Database and database application software
2. WEB and middleware
3.CRM, ERP，SCM
IS
It is a simplified version of Enterprise Server, AS. The difference between it and the common AS series is that AS supports more than 4 CPUs, while ES can only support two CPUs. There is no difference between AS and ES in most packages, only a few packages such as the kernel. The price difference between AS and ES is relatively large. Usually ES is used in OEM versions purchased with the server. For example, when purchasing DELL servers, the Linux paired with it will be the ES series. If you want to match the AS series, you need to spend thousands of dollars.
Typical ES applications are:
1. Company WEB structure
2. Network edge applications (DHCP, DNS, firewall, etc.)
3. Mail and file/print services
4. Small and medium-sized databases and departmental application software
It is the Workstation Server (Workstation Server), a further simplified version of ES, which is mainly aimed at the desktop office market within the enterprise. The best environment for desktop applications is that WS is rarely used in China. It contains a variety of commonly used desktop application software (Office tools, mail, instant messaging, browsers, etc.), can run various client-server configuration tools, software development tools and various application software (such as EDA and Oil/Gas application software) , But it does not provide network service functions (such as DNS and DHCP), it is only suitable for client applications.
There is no difference in function between AS and ES. Regardless of the x86 or Itanium version, the last three disks of RHEL are exactly the same, that is, the software packages are exactly the same. The first disk actually doesn't have any software packages. It just starts the installation program and determines the installation file package. It is only different in the service level, the number of CPUs supported and the amount of memory.
This article is from the blog " Technology Achieves Dreams ", please be sure to keep this source http://ixdba.blog.51cto.com/2895551/526438