Web applications scalability is a common problem most of the web architect face. Any internet facing web application may require to be highly scalable due to heavy load of traffic. Now a days, developing a smart web application is much more than creating dynamic Web pages. Irrespective of programming languages like Java, PHP,.NET, Python, Ruby or others, these challenges are faced by software architects everyday. As the web is growing, our need of building larger and more scalable applications is also becoming more important. In this decade, lot of distributed web applications are being developed that can utilize the resources from multiple machines, by separating the application functionality into manageable group of tasks that can be deployed in a distribute systems.

There are numerous benefits to dividing applications this way, some of the most important are re-usability, scalability, and manageability. Manual Tasks Risk Assessment Tool Mantra. In this article, I am trying to cover all the scalability interview questions you may be asked when you are looking for a web application software architect job.

This list will also make a foundation for java architect interview questions or any other programming language agnostic software architect interview questions. If you are aspiring to become an architect then you must also check some of the. Java Interview Preparation Tips • • • • • • • • • • • What Do You Mean By High Availability?

Having better service capacity with high availability and low latency is mission critical for almost all businesses. Availability means the ability of the application user to access the system, If a user cannot access the application, it is assumed unavailable. High Availability means the application will be available, without interruption. Achieving high availability for a application is not always a easy task.

A distributed file system is a client/server-based application that allows clients to access and process data stored on the server as if it were on their own computer. DFS allows administrators to make it easier for users to access and manage file that are physically distributed across a network. With DFS, you can make files distributed across multiple servers. It may appear for users that files actually reside in one place (computer) on the network. Questions and answers on distributed systems. Enhance the understanding of Distributed Systems. Many questions go like 'list. To a file an idempotent.

Using redundant server nodes with clustering is a common way to achieve higher level of availability in web applications. Availability is commonly expressed as a percentage of uptime in a given year. What Is Scalability? Scalability is the ability of a system, network, or process to handle a growing amount of load by adding more resources.

The adding of resource can be done in two ways • Scaling Up This involves adding more resources to the existing nodes. For example, adding more RAM, Storage or processing power. • Scaling Out This involves adding more nodes to support more users. Any of the approaches can be used for scaling up/out a application, however the cost of adding resources (per user) may change as the volume increases.

If we add resources to the system It should increase the ability of application to take more load in a proportional manner of added resources. An ideal application should be able to serve high level of load in less resources.

However, in practical, linearly scalable system may be the best option achievable. Poorly designed applications may have really high cost on scaling up/out since it will require more resources/user as the load increases. What Is A Cluster? A cluster is group of computer machines that can individually run a software.

Ware Crystal Driver Cs4281 Cm Ep Windows 7.rar. Clusters are typically utilized to achieve high availability for a server software. Clustering is used in many types of servers for high availability. • App Server Cluster An app server cluster is group of machines that can run a application server that can be reliably utilized with a minimum of down-time. • Database Server Cluster An database server cluster is group of machines that can run a database server that can be reliably utilized with a minimum of down-time. Why Do You Need Clustering? Sap Bw Certification Material on this page. Clustering is needed for achieving high availability for a server software. The main purpose of clustering is to achieve 100% availability or a zero down time in service.