What you mean by Hot and Cold Data?

In this post we shall understand – What is Hot and Cold Data?

Now a days it is one of the questions people frequently ask’s in the technical interviews? So let’s understand what they are.

Hot Data

Hot data is the data that we access frequently. Consider this as the critical information that required to be accessed quickly and most of the time organizations use this information for making their decisions. For this type of data where performance matters, meaning that needs to be accessed quickly.

Hot data normally resides on fastest storage so that we get good performance.

Cold Data

Cold data is the data that we do not access frequently. Meaning data that doesn’t need to be accessed for long time like months, quarters or years.

This kind of data is perfect for cold storage.

Why we need different kinds of data or what advantage they bring to the table?

Below are the few reasons for the same-

1. Separating cold data from hot data helps the main storage from overloading.
2. We can use the cheap/commodity hardware for cold storage so it helps in decreasing the total storage cost.
3. It also help in managing the large data set as we will have to manage smaller data set for hot data.

Refer below for more details –

http://www.ibmbigdatahub.com/blog/your-big-data-hot-warm-or-cold
https://cloud.google.com/solutions/partners/komprise-archiving-cold-data

Enjoy !!! Keep Learning

Pawan Khowal 

Http://MSBISkills.com