Data Center Infrastructure:
Data Center is referred to as a physical location or a facility that hosts the bunch of networked IT/Telecom equipment (such as computer servers, storage and networking devices etc.) to store and process business-critical data and to run applications of an organization which are required to support their own or its customer’s business.
Usually, a typical Data Center Infrastructure consists of:
- Storage Arrays
- Networking components like Switches, Routers and Load Balancers
Some other non-IT devices are also required:
- Electric Power Generators
- Computer Room Air Conditioners (CRAC)
- Heating, Ventilation, and Air Conditioning (HVAC) systems
- Exhaust Systems
Data Center Tier:
The architecture build by all above components creates an environment which used to run business-critical applications and store data. But as the numbers of components are high, chances of failure of any component is also high. In case of any component failure, that business-critical application/information can be ruined. To cope with this, Data Centers are designed with different redundancy level to sustain in the worst situation, these levels are also referred to as ‘Tiers‘.
Currently, Data Centers are built with four different redundancy levels like Tier I, II, III & IV. All these levels are meant to provide various type of uptime/availability required for business-critical applications and to prevent it from failures. These Tier levels are categorised by the corresponding number of uptime guarantee:
Tier I: In this type of Data Center all the components are Non-redundant with single uplink and provide up to 99.67% uptime and can be down up to 28.8 hours per year*.
Tier II: In addition to Tier I, there is partial redundancy for DC components and Uptime is 99.75% and downtime can be 22 hours per year.
Tier III: These Data Centers provides 99.98% availability with multiple (N+1) redundant uplinks and dual powered types of equipment. That can manage to reduce downtime up to 1.6 hours per year.
Tier IV: Tier IV Data Centers offers the highest level of uptime guarantee. By 2N+1 redundancy for all Data Centers components, it provides 99.995% uptime and decreases the maximum downtime to only 0.8 hours per year.
In the next few blogs of this Data Center Infrastructure series, I put light on the different types of Data Center Infrastructure like Traditional, Converged Infrastructure, Hyper-Converged Infrastructure and Composable Infrastructure along with some detailed information on Software-Defined Data Centers (SDDC). To know more please stay in touch. 🙂
Check out some more blogs:
- Configuring AWS Greengrass Core on VMware vSphere
- Deploying AWS Greengrass on VMware vSphere
- VNF Manager vs NFV Orchestrator (VNFM vs NFVO)
- Network Functions Virtualization (NFV)
- What is Hyper-Threading?
- Virtual Networking in VMware Workstation
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*ref: The Tiers