54. Can memory-optimised EC2 instances provide cost savings over other types for big data tasks?
memory-optimized EC2 instances can process large datasets faster with fewer instances, which reduces overall runtime and can lead to cost savings compared to general-purpose types.
55. What are the security features available for EC2 snapshots and their data?
EC2 snapshots are automatically stored in Amazon S3 with durability and redundancy, and you can enable encryption (KMS keys) to protect data at rest and in transit.
since Spot Instances can be terminated when demand increases, is there any way to estimate or guess the low-demand times to reduce the risk of termination?
In summary, while exact low-demand times are not explicitly published, you can use off-peak scheduling, diversified instance selections, AWS allocation strategies, and tools like Spot Instance Advisor and rebalance signals to reduce termination risk and optimize Spot usage.
You are running a non-critical batch job and want to reduce cost as much as possible. Which EC2 pricing model is most suitable, even if AWS may stop it anytime?
Choose AWS EC2 Spot Instances to maximize cost savings while accepting the possibility of instance interruption.
What is the main advantage of using Spot Instances in AWS?
The main advantage of using AWS Spot Instances is the massive cost savings, often up to 90% cheaper than On-Demand Instances. This makes Spot Instances highly cost-effective for running fault-tolerant, flexible workloads, such as batch processing, big data analysis, CI/CD pipelines, or testing, where interruptions can be tolerated.