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What's new in NSX-T 3.0

There is various enhancement done in NSX-T version 3.0 by VMware. 

Let's talk about architecture change in NSX-T version 3.0
Some of the below changes were made concerning the internal communication mechanism within the NSX-T components. 
They are:
Architecture ramp-up: NSX Manager and its cluster communicate with their transport nodes through APH Server (Appliance Proxy Hub)

NSX Manager communicates with NSX-Proxy through port 1234.

CCP (Central control plane) communicates with NSX-Proxy through port 1235.

RabbitMQ messaging is replaced with NSX-RPC between the management plane and CCP.
Alarm and EventsIn NSX-T version 3.0, there is an introduction of Alerts and Events which help in the active monitoring of different components of the environment.
Network Topology UIIn NSX-T 3.0 there is a view of the network topology which gives a diagram of each component of NSX-T.  This view gives about numbers of VM connected to segments, numbers of segments, T1, T0. Numbers of uplinks connected to T0.

Reason's for instability of NSX-T Cluster

Some time back I had an issue where my NSX-T lab environment was showing unstable status. My environment consists of 3 NSX-T manager nodes aligned with the VIP IP address. 

The issue where I was unable to access my NSX-T console through VIP IP address nor with my other NSX-T nodes. It's quite intermittent I was able to access console UI from one of the manager node using admin account. However, unable to login to the manager's node using SSH with admin or root account.As I said its quite intermitted where I managed to access the manager UI console. In the below Figure:1, it states that 1-2 manager nodes were showing unavailable. Figure:1
On validating the "VIEW DETAILS" it clearly shows that /var/log partition was 100% full.
Figure:2
Now the main objective is to either compress or delete the old logs from /var/log partition to bring back the manager's node's. 
To accomplish this I booted the NSX-T node VM sequentially, mounting the Ubuntu image using rescue mode to…