Please forward this signal processing interview questions and answers pdf screen to sharedip-10718057119. 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. 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. 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.
Availability is commonly expressed as a percentage of uptime in a given year. Scalability is the ability of a system, network, or process to handle a growing amount of load by adding more resources. This involves adding more resources to the existing nodes. For example, adding more RAM, Storage or processing power. This involves adding more nodes to support more users.
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. A cluster is group of computer machines that can individually run a software. Why Do You Need Clustering? By creating a cluster of more than one machine, we can reduce the chances of our service going un-available in case one of the machine fails.