Using other types of data stores
Elastic Block Store (EBS) is used to create volumes in an availability zone. The volume can only be attached to an EC2 instance in the same availability zone. Amazon EBS provides both SSD (Solid State Drive) and HDD (Hard Disk Drive) types of volumes. For SSD-based volumes, the dominant performance attribute is IOPS (Input Output Per Second), and for HDD it is throughput, which is generally measured as MiB/s. The following table shown in Figure 5.3 provides an overview of the different volumes and types:
EBS is resilient to an availability zone (AZ). If, for some reason, an AZ fails, then the volume cannot be accessed. To avoid such scenarios, snapshots can be created from the EBS volumes and snapshots are stored in S3. Once the snapshot arrives at S3, the data in the snapshot becomes region-resilient. The first snapshot is a full copy of data on the volume and, from...