How Does a Private Cloud Work?
To understand how a private cloud works, we need to start with virtualisation, which is the foundation of cloud computing. Virtualisation involves creating virtual versions of resources like operating systems, storage devices, servers, or network resources, all within a cloud environment. IT organisations use virtualisation to increase efficiency and save costs.
A private cloud is a secure, single-tenant environment where resources from multiple servers are pooled together using virtualisation. This means the cloud is dedicated to one organisation and not shared with others, ensuring security and isolation. Typically, private clouds are available on a monthly lease.
Management of private clouds can vary depending on ownership. Private cloud servers can be located on-site (within the organisation’s facilities) or off-site (at a cloud provider’s data center). The responsibility for managing these environments lies with whoever owns the private cloud infrastructure.
What Is Private Cloud Architecture?
Private cloud architecture is created by pooling all the resources within a data center using virtualisation. This involves software-defined networking and virtual machines to combine resources from multiple servers, whether they’re in different locations or an international colocation facility.
One of the main advantages of cloud architecture is flexibility. By not relying on specific legacy IT hardware, teams can work from anywhere, fostering better collaboration.
Building Blocks of Private Cloud Architecture
There are four key components in private cloud architecture:
Computing
Ensuring sufficient internet speed, bandwidth, CPU capacity, and memory is crucial for the fast data transfers required in cloud environments. IT technicians take steps to ensure reliable delivery of these resources.
Storage
Ample storage is needed to handle all critical data and files, including extra space for backups and disaster recovery.
Management
Software tools are used to manage cloud infrastructure, allowing IT teams to monitor performance metrics across all servers from a single dashboard. This helps minimise downtime and maintain security with regular updates.
Networking
A robust network with enough bandwidth and speed is essential. Efficient resource use is achieved through virtualisation, distributing resources across multiple applications and users.
Deployment Models in Private Cloud Architecture
Companies can deploy private clouds in three ways:
On-premises
A physical data center at a specific location, typically housing legacy IT equipment.
Hybrid cloud
Combines on-premise and cloud architecture, with most servers virtualised but some critical devices kept on-premises.
Hosted private cloud
Can be located in a data center or on-premises, with resources not shared and maintained by the cloud provider.
Public vs Private Cloud
Public Cloud
Shared among multiple users (multi-tenant environment) and provided by major cloud providers like Amazon Web Services (AWS), Microsoft Azure, and Google Cloud. It offers a pay-as-you-go model, allowing organisations to scale resources as they grow, though this can lead to hidden costs.
Private Cloud
Offers greater isolation and compatibility with more types of workloads. It’s a single-tenant environment, ensuring dedicated resources for one organisation, leading to better security and control.