SCALE FROM ZERO TO MILLIONS OF USERS [Part 2] DB replication “Storing copies of data more than one site or node or DB to improve the availability of data” We can set up DB servers in Master (main) / slave (copies) relations. Master will cater for the Write operations(DML operations) and slave will cater read operation(SELECT). Many applications demand…

SCALE FROM ZERO TO MILLIONS OF USERS [Part 1] Designing an application to cater larger audience is an evolutionary journey. Let’s start this voyage together. We’ll begin with a Single user system and gradually evolve to million users. Single Server setup 1. User access website through Domain name (i.e. www.example.com) 2. DNS returns the IP address to the browser 3. Browser…

While designing Distributed Systems, we always consider the below approaches according to the business use case. Consistency — Every read receives the most recent writes or an error irrespective of from which node result is fetched. [Note:- Let’s not assume “Consistency” of CAP and ACID are the same. ACID Consistency…

Caching is the mechanism to enhance the performance of a system by avoiding round trip calls(either to the DB or to the external resources). It works on the principle: recently requested data is likely to be requested again. Considering the principle, the primary reason to set up caching outside…

“Poorly crafted Code frays at the edge much faster than we might expect. “ There is not any specific checklist or harry potter’s stick to write and understand clean code. It’s a paradigm or thought process to design clean or self-explanatory code. But still, I would like to share a…

“Chaos Engineering is the discipline of experimenting on a system in order to build confidence in the system’s capability to withstand turbulent conditions in production.” Introduction With the encouragement of distributed computing or microservice, software systems are changing the game for software engineering. To meet industry need, we are adopting…

Redis, which stands for Remote Dictionary Server, is a fast, open-source (BSD licensed), NoSQL, in-memory key-value data store use as a database, cache, message broker, and queue. Redis supports the following features:- · Replication · Lua scripting · LRU eviction of keys · Transactions and different level of on-disk persistence …

Cloud computing is the future. This paradigm offers significant economic benefit to the business entities. Due to this advancement, it has its challenges and threats which can jeopardize the business entity. Cloud computing has become a new battlefield for cyber-crime. To investigate these cases we needed cloud forensics. “Cloud forensics…

Before discussing, multi-threading way of achieving concurrency, let’s understand about the thread:- · What is the thread? “Thread is a light-weight process” As we know the process is heavy-weight because OS has to do a lot of background activities to create a process(i.e. allocation of buffers, maintain metadata(i.e. process_id, environment…