Solr and Zookeeper Installation:
1)	Zookeeper Service
Service: /etc/init.d/zookeeper  [start/status/stop/restart]
Port : 2181

2)	Solr  5.4.1 Service in cloud mode  with  java 8
Service : /etc/init.d/solr  [start/status/stop/restart]
Port : 8983

3)	Different Drives for Zookeeper and SOLR if they are installed on same server
Zookeeper         :  /opt/zookeeper
Solr Instance     :  /opt/sitecore-solr

Setting up required configurations:

4)	DEV & TEST Env : 1 Replica , 1 Shard   ( as we have only 1 node)
CERT & PROD     :  3 Replica,  1 Shard  ( as we have 3 nodes )    ( according to our conversation making them to 1 shard )

5)	70 Collections (which are there in Dev/TEST Env ):
       Solr Home/Collections:   /opt/sitecore-search

6) There is no schema file or configuration on Solr Cloud.
    Everything has to be boostrapped to zookeeper.