I would like to know the best practices on how to install Centos 7, e.g. the amount of swap file, how to effectively partition the disk and the hardening part.

Consider the log partition sizes, does it needs to be in a separate partition as well, if log files consume your disk rapidly and it is located in the same partition where your systems are located, it will make your system unstable right?

Consider the advice in the CIS guide:

Thanks a lot for the guide, apologize for not checking first the link you sent. Again, I really appreciate your quick response.

You're welcome. There are many, many, many examples of what people consider "best practice" when it comes to swap and partitioning, stick 4 linux guys in a room and they'll fight about it forever.

, Thanks again!

Remember that it depends on what you are installing it on. Partitions for /var and /tmp may be very important on a server, but they are a waste of time on a desktop or laptop. If you let CentOS use LVM (also more suited to a server) or you have EFI, then you need /boot. If you have a modern computer with plenty of memory, you may not need swap. The only thing that's definite is that you need root and home partitions. I have 10GB for root, but I don't have vast amounts of software. See the CentOS and Red Hat documentation for more advice.

CentOS will have the firewall and SEL enabled by default, so it's pretty secure.

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Thanks David McCann! Also, does anyone knows if joining Linux to WIndows domain has advantages over standalone configurations. If so, could anyone provide any available guide of getting Centos server join to Winodws Domain

Depends on why you'd want it on the domain. Without your use-case scenario it's hard to tell.

Hadoop environment

My use case is Hadoop environment cluster running latest version of Centos OS,

Tells us nothing about why you think it should be part of a Windows domain.

Ease of User management, security and audit purposes.

Not at all, /home is perfectly happy living on the root partition. All you need is / (and /boot if EFI), everything else is optional.