What is Instance store in AWS? Detailed Explanation

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Instance store in terms of AWS refers to the temporary block-level storage that is directly attached to an Amazon Elastic Compute Cloud (EC2) instance. It provides low-latency and high-performance storage for applications, enabling them to achieve better I/O performance. The instance store volumes are ideal for temporary storage, such as cache, buffers, and scratch data that can be easily recreated or replicated from other sources.

The instance store, unlike Amazon Elastic Block Store (EBS), is physically attached to the host where the EC2 instance is running. This means that the data stored in the instance store volume is lost if the instance is stopped or terminated. Therefore, it is crucial to ensure that critical data is regularly backed up to a more resilient storage solution, such as Amazon S3 or EBS.

One key advantage of using instance store volumes is their ability to deliver higher input/output operations per second (IOPS) when compared to EBS volumes. This makes them a preferred choice for applications that require high disk I/O performance, such as databases, big data processing, and real-time analytics. By utilizing the instance store, organizations can experience improved application performance and reduced latency.

It's important to note that the size and performance characteristics of an instance store vary based on the instance type. Certain instance types come with multiple instance store volumes, allowing even higher performance and storage capacity. However, it's essential to select the appropriate instance type and size to ensure sufficient storage capacity for your application's needs.

In conclusion, the instance store in AWS provides temporary, high-performance block-level storage that is directly attached to an EC2 instance. It is a suitable choice for applications that require fast I/O performance but can tolerate data loss in case of instance failure. By understanding the capabilities and limitations of the instance store, organizations can make informed decisions when architecting their cloud infrastructure on AWS.

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