Dvd Regions Codes

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Wavelength Zones allow developers to build applications that deliver ultra-lowlatencies to 5G devices and end users. Wavelength deploys standard AWS compute andstorage services to the edge of telecommunication carriers' 5G networks.

AWS operates state-of-the-art, highly available data centers. Although rare, failurescan occur that affect the availability of instances that are in the same location. If youhost all of your instances in a single location that is affected by a failure, none of yourinstances would be available.

When you view your resources, you see only the resources that are tied to the Regionthat you specified. This is because Regions are isolated from each other, and we don'tautomatically replicate resources across Regions.

An AWS account provides multiple Regions so that you can launch Amazon EC2instances in locations that meet your requirements. For example, you mightwant to launch instances in Europe to be closer to your European customersor to meet legal requirements.

The following table lists the Regions provided by an AWS account. You can'tdescribe or access additional Regions from an AWS account, such as theAWS GovCloud (US) Regions or the China Regions. To use a Region introduced after March20, 2019, you must enable the Region. For more information, see Specify which AWS Regions your account can use in theAWS Account Management Reference Guide.

The number and mapping of Availability Zones per Region may vary betweenAWS accounts To list the Availability Zones that are available to your account,you can use the Amazon EC2 console or the command line interface. For more information,see Describe yourRegions.

When you work with an instance using the command line interface or API actions,you must specify its Regional endpoint. For more information about the Regions andendpoints for Amazon EC2, see Amazon EC2 endpointsand quotas in the Amazon Web Services General Reference.

You can use the Amazon EC2 console or the command line interface to determine whichRegions are available for your account. For more information about these commandline interfaces, see Access Amazon EC2.

The longName parameter contains the Region display name. Thefollowing get-parameters-by-path command returns the display name of theaf-south-1 Region. It uses the --query option to scopethe output to the name of the Region. You must enclose the query string in singlequotes on Linux. To run this command using the Windows Command Prompt, either omitthe single quotes or change them to double quotes.

When you launch an instance, you select a Region and a virtual private cloud (VPC),and then you can either select a subnet from one of the Availability Zones or let uschoose one for you. If you distribute your instances across multiple Availability Zonesand one instance fails, you can design your application so that an instance in anotherAvailability Zone can handle requests. You can also use Elastic IP addresses to mask thefailure of an instance in one Availability Zone by rapidly remapping the address to aninstance in another Availability Zone.

The following diagram illustrates multiple Availability Zones in an AWS Region.Availability Zone A and Availability Zone B each have one subnet, and each subnet hasinstances. Availability Zone C has no subnets, therefore you can't launch instances intothis Availability Zone.

As Availability Zones grow over time, our ability to expand them can becomeconstrained. If this happens, we might restrict you from launching an instance in aconstrained Availability Zone unless you already have an instance in that AvailabilityZone. Eventually, we might also remove the constrained Availability Zone from the listof Availability Zones for new accounts. Therefore, your account might have a differentnumber of available Availability Zones in a Region than another account.

To ensure that resources are distributed across the Availability Zones for aRegion, we independently map Availability Zones to codes for each AWS accountin our oldest Regions. For example, the us-east-1a foryour AWS account might not be the same physical location as theus-east-1a for another AWS account.

To coordinate Availability Zones across accounts in all Regions even thosethat map Availability Zones, use the AZ IDs, which are unique and consistent identifiers for an Availability Zone. For example,use1-az1 is an AZ ID for the us-east-1 Region,and it has the same physical location in every AWS account. You can viewthe AZ IDs for your account to determine the physical location of your resourcesrelative to the resources in another account. For example, if you share a subnet inthe Availability Zone with the AZ ID use1-az2 with another account,this subnet is available to that account in the Availability Zone whose AZ ID isalso use1-az2.

You can use the Amazon EC2 console or the command line interface to determine whichAvailability Zones are available for your account. For more information about thesecommand line interfaces, see Access Amazon EC2.

When you launch an instance, select a Region that puts your instances closer tospecific customers, or meets the legal or other requirements that you have. Bylaunching your instances in separate Availability Zones, you can protect yourapplications from the failure of a single location.

When you launch an instance, you can optionally specify an Availability Zone inthe Region that you are using. If you do not specify an Availability Zone, we selectan Availability Zone for you. When you launch your initial instances, we recommendthat you accept the default Availability Zone, because this allows us to select thebest Availability Zone for you based on system health and available capacity. If youlaunch additional instances, specify an Availability Zone only if your new instancesmust be close to, or separated from, your running instances.

If necessary, you can migrate an instance from one Availability Zone to another.For example, if you try to modify the instance type of your instance and we can'tlaunch an instance of the new instance type in the current Availability Zone, youcan migrate the instance to an Availability Zone with capacity for the new instancetype.

If you need to preserve the private IPv4 address of the instance, you mustdelete the subnet in the current Availability Zone and then create a subnetin the new Availability Zone with the same IPv4 address range as theoriginal subnet. Note that you must terminate all instances in a subnetbefore you can delete it. Therefore, you should create AMIs from all of theinstances in your subnet so that you can move all instances from the currentsubnet to the new subnet.

Launch an instance from the AMI that you just created, specifying the newAvailability Zone or subnet. You can use the same instance type as theoriginal instance, or select a new instance type. For more information, seeLaunch instances in anAvailability Zone.

If the original instance is a Reserved Instance, change the Availability Zone for yourreservation. (If you also changed the instance type, you can also change theinstance type for your reservation.) For more information, see Submit modification requests.

A Local Zone is an extension of an AWS Region in geographic proximity to your users. Local Zoneshave their own connections to the internet and support AWS Direct Connect, so that resourcescreated in a Local Zone can serve local users with low-latency communications. For more information, see What is AWS Local Zones? in the AWS Local Zones User Guide.

The following diagram illustrates the AWS Region us-west-2, two of itsAvailability Zones, and two of its Local Zones. The VPC spans the Availability Zones andone of the Local Zones. Each zone in the VPC has one subnet, and each subnet has aninstance.

To use a Local Zone, you must first enable it. For more information, see Opt in to Local Zones. Next, create a subnet in the Local Zone. Finally, launchresources in the Local Zone subnet, such as instances, so that your applications are closeto your users.

Use the describe-availability-zones command as follows to describe allLocal Zones in the specified Region, even if they are not enabled. To describe onlythe Local Zones that you've enabled, omit the --all-availability-zonesoption.

Some AWS resources might not be available in all Regions. Make sure that youcan create the resources that you need in the desired Regions or Local Zones beforelaunching an instance in a specific Local Zone. For a list of services supported ineach Local Zone see AWS Local ZonesFeatures.

When you launch an instance, you can specify a subnet that is in a Local Zone. Youalso allocate an IP address from a network border group. A network border group is aunique set of Availability Zones, Local Zones, or Wavelength Zones from which AWSadvertises IP addresses, for example, us-west-2-lax-1a.

AWS Wavelength enables developers to build applications that deliver ultra-low latenciesto mobile devices and end users. Wavelength deploys standard AWS compute and storageservices to the edge of telecommunication carriers' 5G networks. Developers can extend avirtual private cloud (VPC) to one or more Wavelength Zones, and then use AWSresources like Amazon EC2 instances to run applications that require ultra-low latency and aconnection to AWS services in the Region.

A Wavelength Zone is an isolated zone in the carrier location where the Wavelengthinfrastructure is deployed. Wavelength Zones are tied to a Region. A Wavelength Zone isa logical extension of a Region, and is managed by the control plane in theRegion.

The following diagram illustrates the AWS Region us-west-2, two of itsAvailability Zones, and a Wavelength Zone. The VPC spans the Availability Zones and theWavelength Zone. Each zone in the VPC has one subnet, and each subnet has aninstance.

To use a Wavelength Zone, you must first opt in to the Zone. For more information, seeEnable Wavelength Zones. Next, create a subnet in the WavelengthZone. Finally, launch your resources in the Wavelength Zones subnet, so that yourapplications are closer to your end users.

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