sizing feedback

7/29/2019 Sizing Feedback

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The state-of-the-art Portal is to be hosted at NSDC Internet Data Centre

with primary objectives of high availability, scalable, secure, accessible and

manageable system.

Since the Portal delivers critical services, maximizing its availability

is one of its main objective.

Multi-Layered Architecture: The portal Application, Database and front

end servers are fully independent of each other. Therefore bringing about

change in any of the layers doesnt affect the other layers. Hence the

architecture facilitates high system availability by adding additional node

/ module with zero down time.

Clustered Server components: In order to cater to a couple of million users in 10 years

and providing simultaneous access, and to deliver meta contents to NSDC website etc

multiple server nodes may need to be clustered for processing the user

request simultaneously. Also the clustered system ensures the availability

of the portal during any node failure. The state-of-the-art load balancing

at network level distributes the users request to the cluster nodes

to decrease the system response time and increase its availability.

Storage Area Network: To meet the exponential data growth of the portal,

all server nodes are equipped with SAN storage system which is accessible

through high speed up to 1Gbps Network ensuring that the system is highly

scalable in terms of storage to meet additional requirements.

Pre, Post production auditing: The processing of auditing the application


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modules of the portal before and after production includes, testing

security, performance, usability and accessibility hence ensuring the portals

security and performance. Similarly, any new hardware component which

needs to be added are also tested and tuned before integrating them in

production environment.

Data Backup and Recovery: NSDC portal will have a huge structured

central content repository and consists of valuable skilling services

and information. Thus securing them from storage/Hardware failure is

another core objective of the deployed hosting infrastructure. Moreover

during any natural disaster, the Disaster Recovery System has to

ensure the portals availability and data security. The portal

data is replicated asynchronously over WAN using FC-IP protocol.

Open Source Technology: tTe Portal of India is developed and

hosted in open source platform such as Linux, Apache, MySql, PHP, XML

and Javascript as much as possible. Hence the system is completely flexible and can be easily

configured/upgraded for any additional functionalities.

User Access to the Portal will be through Internet

It will go through a firewall (to be specified by allied)

There will be a switch (to be specified by allied)

There will be a cluster of web servers to service the incoming request and a set of DB cluster servers

to manage the acess to the application DB where required.

Infrastructure Sizing for a Data Server (Database Sizing)

The Db Serves will be connected to the SANs

Year HDD Size on Portal

1 0.5 TB2 2.5 TB


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3 10 TB

4 30 TB

5 75 TB

6 110 TB

7 130 TB

8 150 TB9 170 TB

10 200 TB

Growth in hardware size per year

The growth will be a simple enhancement in the number of servers across each year in the following

ratio

Year 2 to Year 1 1.5 times

Year 3 to Year 2 2 times

Year 4 to Year 3 2.5 times



Year 7 1.2 times

Year 8 1.2 times

Year 9 1.2 times

Year 10 1.2 times

Hardware Specs for the server

Year 1 3 web servers and 3 DB servers with a total of 4000 MB RAM for all put together

Staging Server requirement (Some offline requirements)

Simple Server with 4GB RAM and 100 GB or less HDD should be adequate only for offline content

Maximum Bandwidth needed for the system.

I year

(5500 daily visitors x 12 Page Views x 100 KB) + (5500 file downloads/uploads x 20 MB File Size)]

6600 MB + 110000 MB = 116600 * 1,5 = 175000 MB approx = 175 GB in a day. This can be factored into a per

second calculation

So the min could be around 100 GB - 300 GB

The other years multiply y the same logic.

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