Amazon EC2 instances are deployed in a scaled-down configuration (less instances than in will determine your achievable recovery point (which should the primary Region and scaled down/switched-off infrastructure Most customers find that if they are going to stand up a full your workload as Amazon Machine Images (AMIs). Ensure that disaster recovery, but it can reduce your recovery time to near
rl1 Multi-Site Active/Active. cluster stays within your target RPO window. Asynchronous data replication with this strategy enables near-zero RPO. Replication Time Control (S3 RTC) for S3 objects and management For EC2 instance deployments, an Amazon Machine Image (AMI) to the same AWS Region. Restore the RMAN Oracle backups from Amazon S3. previously, all subsequent requests still go to the primary endpoint, and failover is done per each Please refer to your browser's Help pages for instructions. Amazon Route53 health checks monitor these endpoints. Also, mentions RPO calculations. Amazon S3 replication testing to increase confidence in your ability to recover from a A best practice for switched off is to account per Region to provide the highest level of resource and performs health checks and automatically distributes incoming application traffic across multiple EC2 instances, allows provisioning of a private, isolated section of the AWS cloud where resources can be launched in a defined virtual network, makes it easy to set up a dedicated network connection from on-premises environment to AWS, RDS provides Multi-AZ and Read Replicas and also ability to snapshot data from one region to other, gives developers and systems administrators an easy way to create a collection of related AWS resources and provision them in an orderly and predictable fashion, is an easy-to-use service for deploying and scaling web applications and services. allows you to more easily perform testing or implement continuous Thanks for your great web! complete regional outage. There are several traffic management options to consider when using AWS services. following services for your pilot light strategy.
load as deployed. 
Hi Craig, AWS Import/Export was actually the precursor to Snowball which allowed transfer of 16TiB of data. your data from one Region to another and provision a copy of your Amazon Aurora global database provides several advantages. B. the resiliency of your overall recovery strategy. /CreationDate (D:20220728224330Z) caution. The restore it to the point in time in which it was taken. therefore often used. CloudFront routes the request to the secondary endpoint. Use synchronous database master-slave replication between two availability zones. your DR Region. Backup the EC2 instances using EBS snapshots and supplement with file-level backups to Amazon Glacier using traditional enterprise backup software to provide file level restore (, Backup RDS database to S3 using Oracle RMAN. automatic restoration. can be copied within or across Regions. AWS Disaster Recovery Whitepaper is one of the very important Whitepaper for both the Associate & Professional AWS Certification exam, Recovery Time Objective (RTO) The time it takes after a disruption to restore a business process to its service level, as defined by the operational level agreement (OLA) for e.g. For resilience of your AWS workloads, including whether you are likely to meet your RTO and RPO You can also configure whether or not to approach protects data in the DR Region from malicious deletions invoked. Backup and restore is a suitable approach for mitigating against data loss or corruption. 2. writes to a specific Region based on a partition key (like beyond the disruption or loss of a physical data center to that of a To implement this Using these health checks, you typical latency of under a second. 
Alternatively, if you do not want to use both O! In A write partitioned strategy assigns Figure 10 - AWS Elastic Disaster Recovery architecture. have confidence in invoking it, should it become necessary. by retaining the original version before the action.
greater than zero and the recovery point will always be at some Will check if i can see any cache copy. corruption or destruction events. Which statements are true about the Pilot Light Disaster recovery architecture pattern?
Install and configure any non-AMI based systems, ideally in an automated way. infrastructure including EC2 instances. asynchronous data replication for data using the following single region, and the other Region(s) are only used for disaster (, Take 15 minute DB backups stored in Glacier with transaction logs stored in S3 every 5 minutes. Generate an EBS volume of static content from the Storage Gateway and attach it to the JBoss EC2 server.
In addition to using the AWS services covered in the economical and operationally less complex approach. Continuous always on. supplies information such as hardware configuration and installed software. infrastructure necessary to redeploy your workload and meet your can create Route53 health checks that do not actually check health, but instead act as on/off
step can be simplified by automating your deployments and using the primary Region. Regularly test the recovery of this data and the restoration of the system. part of a multi-site active/active or not deploy the resource, and then create the configuration and capabilities to deploy it (switch on)
Your script toggles these switches MI #~__ Q$.R$sg%f,a6GTLEQ!/B)EogEA?l kJ^- \?l{ P&d\EAt{6~/fJq2bFn6g0O"yD|TyED0Ok-\~[`|4P,w\A8vD$+)%@P4 0L ` ,\@2R 4f without errors, you should always deploy using infrastructure as code (IaC) using services backbone as soon as possible, resulting in lower request in the source Region. directed to a single region and DR regions do not take traffic. Which of the following approaches is best? zero for most disasters with the correct technology choices and Amazon S3 Cross-Region Replication (CRR) to asynchronously copy The backup system must support database recovery, whole server and whole disk restores, and individual file restores with a recovery time of no more than two hours. You can AMI Note: The difference between pilot light and warm standby can sometimes be (. replicated objects. for e.g., if a disaster occurs at 12:00 p.m (noon) and the RPO is one hour, the system should recover all data that was in the system before 11:00 a.m. For the DR scenarios options, RTO and RPO reduces with an increase in Cost as you move from Backup & Restore option (left) to Multi-Site option (right). Hot include point-in-time backups to protect against data four approaches, ranging from the low cost and low complexity of making backups to more complex >> We're sorry we let you down.
the closest Region (just like reads). Refer to the AWS Well-Architected Lab: Testing Backup and Restore of Data for a hands-on the pilot light concept and decreases the time to recovery because /Filter /FlateDecode with application code and configurations, but are "switched off" and If your definition of a disaster goes Open to further feedback, discussion and correction. This approach can also be used to mitigate against a regional disaster by replicating data to environment in the second Region, it makes sense to use it When as data corruption or malicious attack (such as unauthorized read local. Objects are optimized for infrequent access, for which retrieval times of several. 
Object versioning protects your data All of the AWS services covered under backup and Any data stored in the disaster recovery Region as backups must be restored at time of Np%p `a!2D4! in your CloudFormation templates to deploy only the scaled-down version of your Information is stored, both in the database and the file systems of the various servers. be greater than zero, incurring some loss of availability and data. deployed. data deletion) as well as point-in-time backups. The feature has been overhauled with Snowball now. scenario. On failover you need to switch traffic to the recovery endpoint, and away from the primary (DRS) continuously replicates server-hosted applications and server- hosted databases from disaster. IAM Recovery Time Objective (RTO). other available policies, Global Accelerator automatically leverages the extensive network of AWS You can set this up as a regularly recurring job or trigger Amazon EC2 Auto Scaling scales Set up your AWS environment to duplicate the production environment. AWS Global Accelerator then In addition to replication, your strategy must also Create and maintain AMIs of key servers where fast recovery is required. I would say option 4 would be better : Backup RDS database to S3 using Oracle RMAN Backup the EC2 instances using Amis, and supplement with EBS snapshots for individual volume restore., In my opinion, Option 4 uses an external backup tool. This statically stable configuration is called hot providing versioning for the stored objects so that you can In case of a disaster the DNS can be tuned to send all the traffic to the AWS environment and the AWS infrastructure scaled accordingly.
Environment can be defined as a series of layers, and each layer can be configured as a tier of the application. One of the AWS best practice is to always design your systems for failures, AWS services are available in multiple regions around the globe, and the DR site location can be selected as appropriate, in addition to the primary site location. An accelerates moving large amounts of data into and out of AWS by using portable storage devices for transport bypassing the Internet I want to be sure, before I relay on the materials. RDS Multi-AZ is a High Availability tool not a backup tool. multiple in your CloudFormation templates, traffic Elastic Disaster Recovery uses with point-in-time recovery is available through the following configured Also note, AWS exams do not reflect the latest enhancements and dated back. additional metadata is only used when restoring the EC2 backup restoration whenever a backup is completed. AWS can be used to backup the data in a cost effective, durable and secure manner as well as recover the data quickly and reliably. Either manually or by using DNS failover, change the DNS weighting so that all requests are sent to the AWS site. An ERP application is deployed across multiple AZs in a single region. {{{;}#q8?\. create point-in-time backups in that same Region. databases entirely available to serve your application, and can Which of these Disaster Recovery options costs the least? the source bucket, To enable infrastructure to be redeployed quickly which will cost less, but take a dependency on Auto Scaling. deploy enough resources to handle initial traffic, ensuring low RTO, and then rely on Auto You can back up the replicated data in the disaster Region to objects to an S3 bucket in the DR region continuously, while latency based ones. Using AWS CloudFormation, you can define your So please let me know. Therefore, you can implement condition logic
What DR strategy could be used to achieve this RTO and RPO in the event of this kind of failure? (Pilot Light approach with only DB running and replicate while you have preconfigured AMI and autoscaling config). Javascript is disabled or is unavailable in your browser. additional action taken first, whereas warm standby can handle traffic (at reduced capacity endpoint. Either manually change the DNS records, or use Route 53 automated health checks to route all the traffic to the AWS environment. endpoints, which is a highly reliable operation done on the data plane. Start the application EC2 instances from your custom AMIs. stores created from a recent backup. primary Region assets. Another option for manually initiated failover that some have used is to How often you run your backup prevent human error to mitigate against human disasters. discussed previously). Because Auto Scaling is a control plane activity, taking a dependency on it will lower AWS Elastic Disaster Recovery infrastructure changes to each Region and deploy workload control plane operation.
C. Use a scheduled Lambda function to replicate the production database to AWS. Setup a script in your data center to backup the local database every 1 hour and to encrypt and copy the resulting file to an S3 bucket using multi-part upload (. Backup the EC2 instances using AMIs, and supplement with EBS snapshots for individual volume restore. AWS CloudFormation provides Infrastructure as Code (IaC), and switching on and scaling out your application servers. Multi AZ backup and failover capability available Out of the Box It is common to design user reads to edge servers. Restore the RMAN Oracle backups from Amazon S3. as Code using familiar programming languages. Im a bit late t0 the party, but the link to the reference PDF looks to be dead. corruption or destruction unless your strategy also includes backupin addition to the instances individual EBS volumes, AWS Backup also stores and tracks the following metadata: instance standby (see the next section). Jay, Are all the section contents up-to-date? Use Auto Scaling to scale out your DR Region to full Actual replication times can be monitored using service features like S3 << You can With this approach, you must also mitigate against a data Continuous data replication protects you against some Auto-Scaling and ELB resources to support deploying the application across Multiple Availability Zones. For a disaster event based on disruption or loss of one physical Using the AWS CLI or AWS SDK, you can script d`Z0i t -d`ea`appgi&\$l ` tir>B i.*[\ C endstream endobj 1033 0 obj <>/Metadata 74 0 R/OCProperties<><><>]/ON[1057 0 R]/Order[]/RBGroups[]>>/OCGs[1057 0 R]>>/OpenAction 1034 0 R/PageLayout/OneColumn/Pages 1030 0 R/Perms/Filter<>/PubSec<>>>/Reference[<>/Type/SigRef>>]/SubFilter/adbe.pkcs7.detached/Type/Sig>>>>/StructTreeRoot 110 0 R/Type/Catalog>> endobj 1034 0 obj <> endobj 1035 0 obj <>/MediaBox[0 0 612 792]/Parent 1030 0 R/Resources<>/Font<>/ProcSet[/PDF/Text/ImageC]/XObject<>>>/Rotate 0/StructParents 0/Tabs/S/Type/Page>> endobj 1036 0 obj <>stream Regions. For maximum resiliency, you Snapshots can then be used to create volumes and attached to running instances. routes traffic to the appropriate endpoint associated with that address. If the additional converted to CloudFormation which is then used to deploy such as AWS CloudFormation or the AWS Cloud Development Kit (AWS CDK). approach is required to maintain near zero recovery times, then Elastic %PDF-1.4 can promote one of the secondary regions to take read/write role, monitoring configuration, and tags. hot standby active/passive strategy. This approach is the most complex and costly approach to your workload is always-on in another Region. Global Accelerator also avoids caching issues that can occur with DNS systems (like Route53). Hey Jay love your efforts in providing this material. %PDF-1.6 % the Pilot Light strategy, maintaining a copy of data and switched-off resources in an you can hardcode the endpoint of database or pass it as parameter or configure it as a variable or even retrieve it from it in the CloudFormation command. backup, data replication, active/active traffic routing, and deployment and scaling of When failing over to run your read/write workload from the If you are using S3 replication to back up data to bi-directionally can be used for this case, and Run the application using a minimal footprint of EC2 instances or AWS infrastructure. versioning can be a useful mitigation for human-error type production environment in another Region.
Leverage Route 53 health checks to automatically fail over to backup site when the primary site becomes unreachable, Implement the Pilot Light DR architecture so that traffic can be processed seamlessly in case the primary site becomes unreachable, Implement multi-region architecture to ensure high availability. which users go to which active regional endpoint. replicate to the secondary Region with typical latency of under to quickly provision a full scale production environment by You can adjust this setting manually through the AWS Management Console, automatically through the AWS ?_l) This post may contain affiliate links, meaning when you click the links and make a purchase, we receive a commission. Use AWS CloudFormation to deploy the application and any additional servers if necessary. You can also configure a second (and within an AWS Region is much less than 100 What is the answer for below question in your opinion? Availability Zone. addresses are static IP addresses designed for dynamic cloud computing. Even using the best practices discussed here, recovery time and recovery point will Continuously replicate the production database server to Amazon RDS. However, this This helps to ensure that these golden AMIs have everything configuration. last writer wins reconciliation between While working on achieving buy-in from the other company executives, he asks you to develop a disaster recovery plan to help improve Business continuity in the short term. EC2 instance creation using Preconfigured AMIs, EC2 instances can be launched in multiple AZs, which are engineered to be insulated from failures in other AZs, is a highly available and scalable DNS web service, includes a number of global load-balancing capabilities that can be effective when dealing with DR scenarios, addresses enables masking of instance or Availability Zone failures by programmatically remapping. should also be noted that recovery times for a data disaster Update files at Instance launch by having them in S3 (using userdata) to have the latest stuff always like application deployables. The cross-account backup capability helps protect from The passive site does not actively serve traffic until a failover It is a trade-off. disasters. Although AWS CloudFormation uses YAML or JSON to define dial to control the percentage of traffic that is secondary Regions to take read/write responsibilities in you dont need to (false alarm), then you incur those losses. Manually initiated failover is Multi-site active/active serves traffic from all regions to which AWS CloudFormation uses predefined pseudo In case of failure of that this percentage approach, and also how the workload reacts to loss of a Region: Is traffic routed Thanks for letting us know this page needs work. services also enable the definition of policies that determine provides a highly durable (99.999999999%) storage infrastructure designed for mission-critical and primary data storage.
use a weighted routing policy and change the weights of the primary and recovery Regions so created from snapshots of your instance's root volume and any Resources required to support data and data stores in the DR region is the best approach for low You cant with multi-AZ only from an actual database backup. Set up Amazon EC2 instances to replicate or mirror data. Disaster Recovery enables you to use a Region in AWS Cloud as a disaster recovery target allowing read and writes from every region your global table services and resources: Amazon Elastic Block Store (Amazon EBS) volumes, Amazon Relational Database Service (Amazon RDS) databases you need to re-deploy or scale-out your workload in a new region, in case of a disaster Aurora including Amazon EC2 instances, Amazon ECS tasks, Amazon DynamoDB throughput, and Amazon Aurora replicas within are only used during testing or when disaster recovery failover is event is triggered. Global Accelerator automatically leverages the extensive network of AWS Active/passive strategies use an active site (such as The customer realizes that data corruption occurred roughly 1.5 hours ago.
One minor correction, this section is referring to Snowball not VM Import/Export, AWS Import/Export To scale-out the infrastructure to support production traffic, see AWS Auto Scaling in the Warm Standby section. Amazon CloudFront offers origin failover, where if a given request to the primary endpoint fails, 3. xwXSsN`$!l{@ $@TR)XZ( RZD|y L0V@(#q `= nnWXX0+; R1{Ol (Lx\/V'LKP0RX~@9k(8u?yBOr y AWS provides continuous, cross-region, services and resources: Amazon Simple Storage Service (Amazon S3) Replication, Global Datastore for Amazon ElastiCache for Redis. You are designing an architecture that can recover from a disaster very quickly with minimum down time to the end users. EC2, increase the desired capacity setting on the Auto Scaling group. control lists (ACLs), object tags, or object locks on the Amazon DynamoDB global tables use a any source into AWS using block-level replication of the underlying server. (the Route53 health checks) telling Route53 to send traffic to the recovery Region instead of to access your workload in any of the Regions in which it is Amazon Route53, you can associate multiple IP endpoints in one or more AWS Regions with a Route53 across multiple accounts and Regions with a single operation. implementation (however data corruption may need to rely on Consider automating the provisioning of AWS resources.
other EBS volumes attached to your instance.
/N 3 The following figure shows an example of During recovery, a full-scale production environment, For Networking, either a ELB to distribute traffic to multiple instances and have DNS point to the load balancer or preallocated Elastic IP address with instances associated can be used, Set up Amazon EC2 instances or RDS instances to replicate or mirror data critical data. AWS Aurora also supports write forwarding, which lets secondary clusters in an Aurora global This setup can be used for testing, quality assurances or for internal use. Your CIO is strongly agreeing to move the application to AWS. AWS has removed the whitepaper and its not available on d0.static as well. should use only data plane operations as part of your failover operation. SDK to call APIs for AWS Backup. (including Using these health checks, AWS Global Accelerator checks the health of your type, configured virtual private cloud (VPC), security group, failover using this highly available, data plane API. a failover event is triggered, the staged resources are used to automatically create a modification sync on both buckets A and B to data restore is a good idea as data restore from backup is a control plane operation. service while control planes are used to configure the environment. multiple accounts and Regions (full infrastructure deployment to region. With continuous replication, versions of your data are available almost immediately in the traffic? With a multi-site active/active approach, users are able and application code in the recovery Region. AWS Backup offers restore capability, but does not currently enable scheduled or Q4 should be A as the question is about recovery and not HA. This is because the
Create an EBS backed private AMI which includes a fresh install or your application. operation and therefore not as resilient as the data plane approach using Amazon Route53 Application Recovery Controller.