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AWS Glossary > E > Flashcards

E Flashcards

1
Q

EBS

A

See Amazon Elastic Block Store (Amazon EBS).

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2
Q

EC2

A

See Amazon Elastic Compute Cloud (Amazon EC2).

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3
Q

EC2 compute unit

A

(ECU)

An AWS standard for compute CPU and memory. You can use this measure to evaluate the CPU capacity of different EC2 instance types.

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4
Q

EC2 instance

A

A compute instance in the Amazon EC2 service. Other AWS services use the term EC2 instance to distinguish these instances from other types of instances they support.

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5
Q

ECR

A

See Amazon Elastic Container Registry (Amazon ECR).

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6
Q

ECS

A

See Amazon Elastic Container Service (Amazon ECS).

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7
Q

edge location

A

A site that CloudFront uses to cache copies of your content for faster delivery to users at any location.

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8
Q

EFS

A

See Amazon Elastic File System (Amazon EFS).

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9
Q

Elastic

A

A company that provides open-source solutions—including Elasticsearch, Logstash, Kibana, and Beats—that are designed to take data from any source and search, analyze, and visualize it in real time.

Amazon Elasticsearch Service (Amazon ES) is an AWS managed service for deploying, operating, and scaling Elasticsearch in the AWS Cloud.

See Also Amazon Elasticsearch Service (Amazon ES).

See Also Elasticsearch.

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10
Q

Elastic Block Store

A

See Amazon Elastic Block Store (Amazon EBS).

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11
Q

Elastic IP address

A

A fixed (static) IP address that you have allocated in Amazon EC2 or Amazon VPC and then attached to an instance. Elastic IP addresses are associated with your account, not a specific instance. They are elastic because you can easily allocate, attach, detach, and free them as your needs change. Unlike traditional static IP addresses, Elastic IP addresses allow you to mask instance or Availability Zone failures by rapidly remapping your public IP addresses to another instance.

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12
Q

Elastic Load Balancing

A

A web service that improves an application’s availability by distributing incoming traffic between two or more EC2 instances.

See Also https://aws.amazon.com/elasticloadbalancing.

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13
Q

elastic network interface

A

An additional network interface that can be attached to an instance. Elastic network interfaces include a primary private IP address, one or more secondary private IP addresses, an elastic IP address (optional), a MAC address, membership in specified security groups, a description, and a source/destination check flag. You can create an elastic network interface, attach it to an instance, detach it from an instance, and attach it to another instance.

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14
Q

Elasticsearch

A

An open source, real-time distributed search and analytics engine used for full-text search, structured search, and analytics. Elasticsearch was developed by the Elastic company.

Amazon Elasticsearch Service (Amazon ES) is an AWS managed service for deploying, operating, and scaling Elasticsearch in the AWS Cloud.

See Also Amazon Elasticsearch Service (Amazon ES).

See Also Elastic.

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15
Q

EMR

A

See Amazon EMR (Amazon EMR).

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16
Q

encrypt

A

To use a mathematical algorithm to make data unintelligible to unauthorized users while allowing authorized users a method (such as a key or password) to convert the altered data back to its original state.

17
Q

encryption context

A

A set of key–value pairs that contains additional information associated with AWS Key Management Service (AWS KMS)–encrypted information.

18
Q

endpoint

A

A URL that identifies a host and port as the entry point for a web service. Every web service request contains an endpoint. Most AWS products provide regional endpoints to enable faster connectivity.

Amazon ElastiCache: The DNS name of a cache node.

Amazon RDS: The DNS name of a DB instance.

AWS CloudFormation: The DNS name or IP address of the server that receives an HTTP request.

19
Q

endpoint port

A

Amazon ElastiCache: The port number used by a cache node.

Amazon RDS: The port number used by a DB instance.

20
Q

envelope encryption

A

The use of a master key and a data key to algorithmically protect data. The master key is used to encrypt and decrypt the data key and the data key is used to encrypt and decrypt the data itself.

21
Q

environment

A

AWS Elastic Beanstalk: A specific running instance of an application. The application has a CNAME and includes an application version and a customizable configuration (which is inherited from the default container type).

AWS CodeDeploy: Instances in a deployment group in a blue/green deployment. At the start of a blue/green deployment, the deployment group is made up of instances in the original environment. At the end of the deployment, the deployment group is made up of instances in the replacement environment.

22
Q

environment configuration

A

A collection of parameters and settings that define how an environment and its associated resources behave.

23
Q

ephemeral store

A

See instance store.

24
Q

epoch

A

The date from which time is measured. For most Unix environments, the epoch is January 1, 1970.

25
Q

ETL

A

See extract, transform, and load (ETL).

26
Q

evaluation

A

Amazon Machine Learning: The process of measuring the predictive performance of a machine learning (ML) model.

Also a machine learning object that stores the details and result of an ML model evaluation.

27
Q

evaluation datasource

A

The data that Amazon Machine Learning uses to evaluate the predictive accuracy of a machine learning model.

28
Q

eventual consistency

A

The method through which AWS products achieve high availability, which involves replicating data across multiple servers in Amazon’s data centers. When data is written or updated and Success is returned, all copies of the data are updated. However, it takes time for the data to propagate to all storage locations. The data will eventually be consistent, but an immediate read might not show the change. Consistency is usually reached within seconds.

See Also data consistency.

See Also eventually consistent read.

See Also strongly consistent read.

29
Q

eventually consistent read

A

A read process that returns data from only one region and might not show the most recent write information. However, if you repeat your read request after a short time, the response should eventually return the latest data.

See Also data consistency.

See Also eventual consistency.

See Also strongly consistent read.

30
Q

eviction

A

The deletion by CloudFront of an object from an edge location before its expiration time. If an object in an edge location isn’t frequently requested, CloudFront might evict the object (remove the object before its expiration date) to make room for objects that are more popular.

31
Q

exbibyte

A

(EiB)

A contraction of exa binary byte, an exbibyte is 2^60 or 1,152,921,504,606,846,976 bytes. An exabyte (EB) is 10^18 or 1,000,000,000,000,000,000 bytes. 1,024 EiB is a zebibyte.

32
Q

expiration

A

For CloudFront caching, the time when CloudFront stops responding to user requests with an object. If you don’t use headers or CloudFront distribution settings to specify how long you want objects to stay in an edge location, the objects expire after 24 hours. The next time a user requests an object that has expired, CloudFront forwards the request to the origin.

33
Q

explicit launch permission

A

An Amazon Machine Image (AMI) launch permission granted to a specific AWS account.

34
Q

exponential backoff

A

A strategy that incrementally increases the wait between retry attempts in order to reduce the load on the system and increase the likelihood that repeated requests will succeed. For example, client applications might wait up to 400 milliseconds before attempting the first retry, up to 1600 milliseconds before the second, up to 6400 milliseconds (6.4 seconds) before the third, and so on.

35
Q

expression

A

Amazon CloudSearch: A numeric expression that you can use to control how search hits are sorted. You can construct Amazon CloudSearch expressions using numeric fields, other rank expressions, a document’s default relevance score, and standard numeric operators and functions. When you use the sort option to specify an expression in a search request, the expression is evaluated for each search hit and the hits are listed according to their expression values.

36
Q

extract, transform, and load (ETL)

A

A process that is used to integrate data from multiple sources. Data is collected from sources (extract), converted to an appropriate format (transform), and written to a target data store (load) for purposes of analysis and querying.

ETL tools combine these three functions to consolidate and move data from one environment to another. AWS Glue is a fully managed ETL service for discovering and organizing data, transforming it, and making it available for search and analytics.

AWS Glossary (25 decks)

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