study questions Flashcards
EC2 Instance Types
warm standby
A reporting application runs on Amazon EC2 instances behind an Application Load Balancer. The instances run in an Amazon EC2 Auto Scaling group across multiple Availability Zones. For complex reports, the application can take up to 15 minutes to respond to a request. A solutions architect is concerned that users will receive HTTP 5xx errors if a report request is in process during a scale-in event.
What should the solutions architect do to ensure that user requests will be completed before instances are terminated?
Correct. By default, Elastic Load Balancing waits 300 seconds before the completion of the deregistration process, which can help in-flight requests to the target become complete. To change the amount of time that Elastic Load Balancing waits, update the deregistration delay value.
For more information about deregistration delay
Throughput optimied HDD
Throughput Optimized HDD (st1) EBS volumes are engineered to maximize the throughput of data that can be sent to and from a volume, not the random IOPS. Consequently, this solution does not meet the IOPS requirement. In addition, Amazon EBS adds cost to the hourly instance rate. This solution provides persistence of data beyond the lifecycle of the instance, but persistence is not required in this use case.
Baseline I/O performance for General Purpose SSD storage is 3 IOPS for each GiB. For 334 GiB of storage, the baseline performance would be 1,002 IOPS. Additionally, General Purpose SSD storage is more cost-effective than Provisioned IOPS storage.
ebs volume types
SSD-backed storage for transactional workloads, such as databases, virtual desktops, and boot volumes, and HDD-backed storage for throughput-intensive workloads, such as MapReduce and log processing.
ssd volumess
General Purpose SSD volumes (gp3 and gp2) balance price and performance for transactional applications, including virtual desktops, test and development environments, and interactive gaming applications.
Provisioned IOPS SSD volumes are the highest performance EBS volumes (io2 and io1) for your most demanding transactional applications, including SAP HANA, Microsoft SQL Server, and IBM DB2.
Hdd volumes
HDD-based volumes include Throughput Optimized HDD (st1) for frequently accessed, throughput-intensive workloads and the lowest cost Cold HDD (sc1) for less frequently accessed data.
EBS Encryption
When you create an encrypted EBS volume and attach it to a supported instance type, data stored at rest on the volume, disk I/O, and snapshots that were created from the volume are all encrypted. The encryption occurs on the servers that host EC2 instances, providing encryption of data in transit from EC2 instances to Amazon EBS storage.
Volumes pricing
Pricing for EBS volumes is based on the volume type, provisioned volume size, and the provisioned IOPS and throughput performance. EBS volume pricing varies based on the Availability Zone where it resides. The pricing for Amazon EBS snapshots is based on the actual amount of storage space that you use.
Windows file share
smb key word
RDS from single AZ to Multi AZ
Zero downtime just click modify
RDS custom
MS SQL and Oracle can access EC2 with this only
Aurora
can grow. From 10G to 128TB automatically
failover instsnt
6 copies across 3 AZ
can have a master from a read
contains a reader and a writer enpoint used for read autoscaling
rds backup
daily full backup
transition logs every 5 minutes
or
Manual snapshots which don’t expire
good way to restart and rest=========7
aurora Backups
1 to 35 days automatic
snapshots manually
can be restored from S3 percona
