Amazon Elastic Block Storage, block level storage volumes for Amazon instances.
- Network attached
- Independent from life of an instance
- Highly Available, reliable
- For applications which need database, file system, or access to raw block level storage
- Size – 1 GB to 1 TB
- One EBS volume can be attached to one instance at a time
- 1..n relationship with AMI
- raw, unformatted block devices
- It can be specific Availability Zone
- automatically replicated within the same Availability Zone
- point-in-time snapshots of volumes facility on S3
- AWS hosted public data sets are available free of cost.
- performance metrics for EBS volumes, giving you insight into bandwidth, throughput, latency, and queue depth can be monitored via CloudWatch
- used as boot partitions for Amazon EC2 instances, which allows you to increase the size of your boot partition up to 1 TB – preserve your boot partition data beyond the life of your instance.
- Standard volumes
- cost effective
- moderate or bursty I/O requirements
- 100 IOPS
- well suited for use as boot volumes
- Provisioned IOPS volumes
- Deliver predictable, high performance for I/O intensive workloads such as databases
- Specify an IOPS rate when creating a volume, and then Amazon EBS provisions that rate for the lifetime of the volume
- supports up to 2000 IOPS per Provisioned IOPS volume
- EBS-optimized instances deliver dedicated throughput between Amazon EC2 and Amazon EBS, with options between 500 Mbps and 1000 Mbps depending on the instance type used.
- EBS snapshots are incremental backups
- Volume storage is charged by the amount you provision in GB per month
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