Aisle containment
 

I am making the in row cooling system in datacenter but kind of confused on choosing the aisle containment. Which one should I go for, hot or cold containment? Pros and cons?

Well, if you are going for cold aisle containment then it is going to be like analog system. You can make a small area cold with few energy. For different specific places you can have cold aisle containment. So if you dont need to cool all the places of your datacenter then this could be a good option.
On the other hand, hot containment is like digital; you can cool the entire place. But it need much more power efficiency than the cold aisle containment, also expensive than cold aisle.