Codingntechinterview.blogspot.com Website Review

Scalable web application is one which can scale based on the load at any given time. An example of such an application will be a shopping site which expects a surge in traffic during Thanksgiving or Christmas time. Such a site should be designed keeping in mind the seasonal peak load along with regular traffic during other times of the year. There are many factors which determine scalability of an application. A few of them are: There are multiple steps involved in designing a truly scalable app. Each step has its own importance. Lets go over them. Before building anything, its a good idea to get to know it. Have some meetings with your product management team and understand: Trust me, this knowledge helps you fine tune your design so that the app delivers what its expected to do. Although you should be the one who should decide & let your management team know about the infrastructure which is required for this app to function as expected, its worthwhile to ask a few questions beforehand like: Now is the time to start designing your app. Best way to start designing is to whiteboard all the large components of your application first and mark their interactions. Once you have a high level view of how the app looks like, you can start detail-designing Some of the components which are usually present in these interactions (but not limited to) are: Build an interaction diagram of the above components, including other components your app might have. Fine tune these interactions & try to lock-down on them. Once you have high level components in place, start thinking at a detailed level. will also give you an idea if number of app servers in Production are sufficient enough to handle expected peak load. multiple tables. Excessive normalization slows down queries even if right indexes are in place & is not a good idea for heavily used app. Some amount of data repetition across multiple tables is okay in real world. databases. Create proper indexes based on the attributes which will be queried upon often.