EC2 Instance Storage Flashcards
What is EBS?
Elastic Block Storage is a network-attached drive that is linked to an AZ. Allow data to persist. is terminated by default for root volumes but not others created by users.
What are EBS snapshots?
These are backs ups of EBS volumes at a point in time. these snapshots can be copied across AZ or region.
AMI?
Amazon Machine Images, are region-specific configurations for the EC2 instance.
EC2 Instance Store?
EC2 Instance store is an alternative to the limited performance EBS. It is a high-performing disk. useful for better I/O. If EC2 instance is topped then data will be lost, EC2 instance store will terminate.
How many EBS volume types are there?
There are 6 types: gp2/gp3 -general-purpose ssd; io1/io2 = high-performance ssd and st1- workload intensive, frequently accessed HDD and sc1 - infrequently accessed low cost HDD
What are the limits of general-purpose SSD
cost-effective storage, low latency; 1Gib-16Tib, Max 16000 IOPS.
What is the use case for Provisioned IOPS?
Provisioned IOPS are SSD volumes used for critical business applications and apps that need more than 16,000 IOPS, 64000 for Nitro, and 32000 for others.
What volumes can be boot volumes?
gp2/gp3 not st1/sc2
What is EBS Multi attach?
EBS multi attach can be used with IOPS1/IOPS2. this allows for a single EBS volume to be attached to multiple EC2 instances in a single AZ.
EBS Encryption?
Creating an encrypted EBS volume results in:• Data at rest is encrypted inside the volume
• All the data in flight moving between the instance and the volume is encrypted
• All snapshots are encrypted
• All volumes created from the snapshot
What is EFS?
Elastic File Service- networked file system spans multi az and can have multiple EC2 instances attached. Can only be used for Linux systems.
HOw is EFS encrypted?
encrypted with KMS at rest and used a security group for access management.
