Technical Essentials - Storage-Block Flashcards
Amazon Elastic Compute Cloud (Amazon EC2) ____ store provides temporary block-level storage for an instance. This storage is located on disks that are physically attached to the host computer. This ties the lifecycle of the data to the lifecycle of the EC2 instance.
instance
If you delete the instance, the instance store is also deleted. Because of this, instance store is considered ephemeral storage.
____ store is ideal if you host applications that replicate data to other EC2 instances, such as Hadoop clusters.
For these cluster-based workloads, having the speed of locally attached volumes and the resiliency of replicated data helps you achieve data distribution at high performance.
Instance
____ stores are ideal for temporary storage of information that changes frequently, such as buffers, caches, scratch data, and other temporary content.
Instance
Amazon ____ is block-level storage that you can attach to an Amazon EC2 instance.
Elastic Block Store (Amazon EBS)
This attachable storage is called an EBS volume.
You can detach an EBS volume from one EC2 instance and attach it to another EC2 instance in the same ____ to access the data on it.
Availability Zone
The external drive is separate from the computer. That means that if an accident occurs and the computer goes down, you still have your data on your external drive. The same is true for EBS volumes.
Amazon EBS volumes have a max limitation on how much content you can store on it.
Most EBS volumes have a one-to-one relationship with EC2 instances, so they cannot be shared by or attached to multiple instances at one time.
AWS announced the Amazon EBS multi-attach feature that permits Provisioned IOPS SSD (io1 or io2) volumes to be attached to multiple EC2 instances at one time. This feature is not available for all instance types, and all instances must be in the same Availability Zone.
What are two ways of scaling Amazon EBS volumes?
Increase volume size - only if it doesn’t increase above the maximum size limit. Depending on the volume selected, Amazon EBS currently supports a maximum volume size of 64 tebibytes (TiB).
Attach multiple volumes - to a single EC2 instance. Amazon EC2 has a one-to-many relationship with EBS volumes. You can add these additional volumes during or after EC2 instance creation to provide more storage capacity for your hosts.
What are four use cases for Amazon EBS volumes?
operating systems
databases
enterprise applications
big data analytics engines
Use Cases for Amazon EBS volumes:
Operating systems - Boot and root volumes can be used to store an operating system. The root device for an instance launched from an Amazon Machine Image (AMI) is typically an EBS volume. These are commonly referred to as EBS-backed AMIs.
Use Cases for Amazon EBS volumes:
Databases - As a storage layer for databases running on Amazon EC2 that will scale with your performance needs and provide consistent and low-latency performance.
Use Cases for Amazon EBS volumes:
Enterprise applications - Amazon EBS provides high availability and high durability block storage to run business-critical applications.
Use Cases for Amazon EBS volumes:
Big data analytics engines - Amazon EBS offers data persistence, dynamic performance adjustments, and the ability to detach and reattach volumes, so you can resize clusters for big data analytics.
EBS volumes are organized into two main categories: solid-state drives (SSDs) and hard-disk drives (HDDs).
____ are used for transactional workloads with frequent read/write operations with small I/O size.
____ are used for large streaming workloads that need high throughput performance.
SSDs
HDDs
Identify the type of EBS SSD volume that is described:
Provides a balance of price and performance for a wide variety of transaction workloads.
EBS Multi-attach not supported.
a) General Purpose
b) Provisioned IOPS
General purpose
Identify the type of EBS SSD volume that is described:
Provides high-performance SSD designed for latency-sensitive transactional workloads
EBS Multi-attach supported.
a) General Purpose
b) Provisioned IOPS
Provisioned IOPS
Identify the type of EBS HHD volume that is described:
A low-cost HDD designed for frequently accessed, throughput-intensive workloads.
Max IOPS per volume is 500
EBS Multi-attach not supported
a) Throughput Optimized
b) Cold
Throughput Optimized
Identify the type of EBS HHD volume that is described:
The lowest cost HDD designed for less frequently accessed workloads
Max IOPS per volume is 250
EBS Multi-attach not supported
a) Throughput Optimized
b) Cold
Cold
When you create an EBS volume, it is automatically replicated in its ____ to prevent data loss from single points of failure.
Availability Zone
With Amazon EBS, storage persists even when your instance doesn’t.
When activated by the user, all EBS volumes support ____.
encryption
EBS volumes support on-the-fly changes. Modify volume type, volume size, and input/output operations per second (IOPS) capacity without stopping your instance.
Amazon EBS provides the ability to create backups of any EBS volume.
EBS ____ are incremental backups that only save the blocks on the volume that have changed after your most recent snapshot.
snapshots
When you take a snapshot of any of your EBS volumes, the backups are stored redundantly in multiple ____ using Amazon S3.
Availability Zones
You manage your EBS snapshots in the ____, which is part of the Amazon EC2 console.
Amazon EBS console
EBS snapshots can be used to create multiple new volumes, whether they’re in the same Availability Zone or a different one.
Recap EBS SSD Volumes
Recap EBS HDD Volumes
