Resilient computing is a computing approach that involves distributing redundant IT resources for operational purposes. With this approach, IT resources are pre-configured to be readily available during processing time and can be used without interruption.
The flexibility of cloud computing allows for the redundancy of IT resources within a single cloud or across multiple clouds, which can improve the efficiency and availability of applications.
Cloud resilience refers to the ability of servers, storage systems, data servers, or entire networks to remain connected to the network without interfering with their functions or losing their operational capabilities. To achieve this, cloud systems cluster servers, have redundant workloads, and rely on multiple physical servers.
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Cloud technology can provide superior security to customers.
There are three basic strategies used to improve the resilience of a cloud system: testing and monitoring, checkpoint and restart, and replication. Testing and monitoring ensure that equipment meets minimum behavioural requirements, while checkpoint and restart save the state of the system for restoration in case of failure. Replication involves replicating essential components of a device using additional resources.
Cloud technology can provide superior security to customers, protect against DDoS attacks, and use redundant security mechanisms to safeguard data. It also allows for regulatory compliance and control of advanced networks while improving the security of sensitive data.
The permanence of the cloud infrastructure allows for the recovery of all data if the computer machine is damaged or destroyed, ensuring the stability of the infrastructure and data.
However, there are critical aspects of resiliency that need to be addressed. Testing and evaluating cloud application resilience before going live can be challenging, as traditional research methods may not effectively reveal durability problems. Heterogeneous and multi-layer architectures are also vulnerable to failure due to the complexity of interactions between different software entities.
