SLT Tier lll Data Center Visit - The visit to SLT, Data Center, Homagama - Internship at LEARN

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 SLT Tier lll Data Center Visit - The visit to SLT, Data Center, Homagama 

Objectives

  • Get know about the Data Center and mechanisms in the Data Center

Introduction


On 16th January 2018 Sri Lanka Telecom (SLT) opened a Tier 3 National Data Center (DC) in Pitipana - Homagama. It is named as the “National Data Centre” and is one of the Tier III (or higher) Data Centers that are found in Sri Lanka and only two such Data Centers exists in Sri Lanka, and the other one belongs to the Dialog Axiata.

Data center is utilized with 500 racks. Infrastructure and the operations are done in the Data Center with SCADA system which is installed in the datacenter for handling and monitoring purposes. It is focusing on Software Defined Networks(SDN) and Network Function Virtualization(NFV) than towards a traditional infrastructure.

Main areas in the data center are,

  1. Chiller room

Circulating the heat in the datacenter is done using the chiller systems. Two chiller systems are installed currently and three to be installed. It is a liquid based systems and consisting with all monitoring devices for monitor the heat in the systems. circular/ ring tunnels are used for water supply and it is a solution for preventing the interruptions on the tunnel when installing new systems.

  1. Water treatment area

Water is treated before supply to the chiller systems. And water harvesting is done according to the green standards. And water treatment area is located under the ground.

  1. Battery room

Batteries of UPS are connected and monitored simultaneously for the battery health and also water leakages.

  1. Generator room

Currently two Diesel Generators are installed in a better structured and sound proofed area and four more generators to be installed. Due to the power failures in CEB, the generators are turned on automatically to power up UPS. Generators are turned off after 20 min after CEB supply is back to prevent the failures due to fluctuation in power supply.

  1. Technical room

Measurement and monitoring energy quality are provided using SCADA systems. Equipment PAHU (Precision Air Handling Unit), PMM (Power Management Modules) are contained in the technical room.

  1. Low density: Data Center

In Low- Density Area Data Center power consumption is estimated at 5 kW per rack(threshold is 3kW).floor cooling distribution system is applied in the containment chambers. Cold aisle are used for separating  hot and cold air streams to prevent consuming more power in the data center. Two spines are used and pods are implemented as leaves which are connected to a Top of Rack(ToR)in the infrastructure.

  1. High Density: Data Center

More power is drawn by the racks than low-density racks, and power consumption is around 8kW and in some cases it is risen upto 13kW to provide that the busbar trunking system takes more space and are larger than the one that is found in the Low-Density area. 

  1. Entrance room

Tenants are allowed to enter and connect their link to SLT switch. 

  1. Main Distribution Area (MDA)

The main distribution area or MDA is the hub of the cabling system and may be located in the computer room. 

  1. Other areas

  • Visiting lounge
  • Panel Room
  • Controller Room
  • Conference Room

Safety and Security Measures

  • Access Control (Door Locks equipped with tags and biometrics)
  • VESDA (Very Early Smoke Detection Apparatus)
  • Smoke and Fire Protection (Road System around the DC)
  • CCTV system that is available for 24x7 (up to 60 cameras  along main road of the DC) 
  • A road around DC to travel Fire extinguishers
  • Lightning Protection
  • Critical sections are located in 2 separate buildings (DC in one building and generators/cooling in another)

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