ContentsServers Web server Apache Tomcat Application Server Weblogic serverShared Hosting & Dedicated Hosting Admin Server Managed Server Entry level configuration Multi server configuration Enterprise server configuration SSL Back up Server
Web Server A web server is a specialized type of file server. Its job is to retrieve files from the server’s hard drive, format the files for the Web browser, and send them out via the network. Web servers are designed to do a great job of sending static content out to a large number of users. The pages delivered by the server are expected to be the same for everyone who visits the server. The function of a typical Web server is shown below. The user requests a web page. The Web Server finds the web page file in a local directory and sends it back out to the user. When graphic files are requested, the same thing happens. The Web Server finds the requested graphic files and sends them back to the user. The Web Server standards were originally designed to publish static documents on the Internet. There was a limited capability for accessing dynamic content, but this was never intended to support high volume, highly interactive Web applications.
Apache Tomcat is a Web server Tomcat is an open source web server developed by Apache Group. Apache Tomcat is the servlet container that is used in the official Reference Implementation for the Java Servlet and Java Server Pages(JSP) technologies. The Java Servlet and Java Server Pages specifications are developed by Sun under the Java Community Process. Web Servers like Apache Tomcat support only web components.
Application Server Application servers are designed specifically to extend web servers to support dynamic content. The application server software “hooks in” to the web server software and automatically intercepts any user requests for dynamic content. The web server still sends out static web pages and graphic files–Just like before. But now, the application server can create dynamic content by mixing data with templates, running programs, or by accessing databases.
Weblogic is an Application server Its a Java Application server by BEA. Unlike normal Webserver(like Apache, Tomcat..) which just handles HTTP type request, the application server handles business logic to application programs through any number of protocols One can do much more than server static files with web logic application server. They contain tools to deploy and manage java programming environment including JSP, servlets and EJB (Enterprise Java beans, creates Business Logic). As an application server weblogic also provides you a "managed" environment including transactions, connection pools etc.
Shared Hosting and Dedicatedhosting Shared hosting, sometimes called shared services or virtual hosting, is simply when multiple web sites share the same server, thus reducing the cost for everyone. The only real problem with shared hosting is if the host has put too many sites on one server. Dedicated Hosting comes in various configurations depending on your requirement. All servers will at least be managed at hardware layer. This allows maximum optimized performance. This server is not shared with anybody and entire servers resources are exclusively available to drive your business applications. For instance, We will see Dedicated Hosting in WebLogic server. In the coming slides.
Admin Server Administration Server Can be only one for a Domain, which works like a Central Configuration/Monitoring controller for the entire domain. AdminServer helps us to Migrate Servers and Services within the domain. AdminServer helps us to Deploy Applications within the domain…targeted to ManagedServers/Clusters or targeted to AdminServer itself.
Managed Servers Managed Servers are similar to the Administration Servers, except few differences. Like Managed Servers will not have Administration Console Application (consoleapp) deployed in it. The benefit of using Dedicated hosting is that your website or application performance will not be effected by high traffic websites that would have been sharing your servers bandwidth. Moreover, it is more flexible than shared hosting, as webmasters have full control over the server, including choice of operating system, hardware.
How Managed Servers interacts with AdminServer? The Administration Server stores the master copy of the domain configuration, which contains all the configuration for all managed servers in the domain including other resource configurations like DataSource, JMS resources, WLDF , mail Session…etc configurations as part of the “config.xml” file. If AdminServer is already started then while startup operation of Managed Server, it connects to the Administration Server to synchronize the configuration and in case of any modifications in the “config.xml” it collects those changes from the AdminServer. If AdminServer is not already running and if we will try to start Managed Servers (in MSI Mode) then Managed Servers get the Cached Configuration file which is provided by the NodeManager with the name of “msi-config.xml”. The types of configurations are as follows:
Entry Level Configuration Entry Level Configuration allows a webmaster to rent an entire server. This server is not shared with anybody. This is more flexible than Shared hosting as webmasters have full control over the server, including choice of operating system, hardware, etc. Unlike shared hosting, a managed servers entire resources are exclusively available to drive your business applications. It represents the advantage of helping you manage your costs without upfront hardware expenditure and the ability for technological advancements as your business requirements grow. Running a managed server is all about control, resources and flexibility
Multiple Server Configuration Made up of at least 2 servers and may have as many as several hundred servers. There are usually web servers, application servers and middleware, and database serevrs in high-availability configurations, together with network and security infrastructure. Supported technologies include the Windows, Linux and Solaris operating systems; the MySQL, Microsoft SQL Server and Oracle databases; common Java 2 Platform, Enterprise Edition (J2EE) application servers, such as JBoss, WebLogic, WebSphere; Microsoft products, such as Biztalk Server and Commerce Server; and application servers for open-source languages, such as Perl, PHP and Python.
Enterprise Server Configuration This is operational support for enterprise applications, such as customer relationship management, enterprise resource planning (ERP) and sales-force automation. These configurations are typically made up of at least 6 servers and may be very large. They may be managed in conjunction with a system integrator or other external service provider.
SSLWhat is SSL? Secure Sockets Layer (SSL) is a global standard security technology developed by Netscape in 1994. SSL creates an encrypted link between a web server and a web browser to ensure that all data transmitted remains private and secure. Millions of consumers recognize the "golden padlock" which appears in their browser to indicate they are viewing a secure webpage.Why do I need SSL? Gain competitive advantage by appearing more trusted and more legitimate. Provide assurance to your customers that their data cannot be tampered with or forged. Ensure that your customers data is transmitted securely.SSL and HTTPS An SSL session is started by sending a request to the Web server with an HTTPS prefix in the URL, which causes port number 443 to be placed into the packets. Port 443 is the number assigned to the SSL application on the server
Back up Server This is a Hosted Continuous Data Protection solution to backup your server contents. The solution enables disk-based data protection, disaster recovery and bare metal restore for servers and workstations running Linux and Windows systems/ It is the first high performance backup and restoration product for MySQL and the only software to offer True Granular Restore for MySQL.