chore(kb/aws): extend rds notes

knowledge base/cloud computing/aws/README.md

@@ -191,6 +191,17 @@ One can choose any of the following retention periods for instances' Performance
 - _n_ months, where n is a number from 1 to 24.<br/>
   In CLI and IaC, this number must be _n*31_.
 
+One can export DB snapshot data to [S3] buckets.
+
+The export process runs in the background and does **not** affect the performance of active DB instances.
+
+RDS extracts data from snapshots and stores it in Apache Parquet format.<br/>
+By default, **all** data in the snapshots is exported; one can export specific sets of databases, schemas, or tables.
+
+After the export, one can analyze the data directly through
+[Athena](https://docs.aws.amazon.com/athena/latest/ug/parquet-serde.html) or
+[Redshift Spectrum](https://docs.aws.amazon.com/redshift/latest/dg/copy-usage_notes-copy-from-columnar.html).
+
 ### Security Hub
 
 FIXME
@@ -349,6 +360,8 @@ Examples:
 - [Introduction to backups][rds  introduction to backups] for RDS
 - [Pricing and data retention for Performance Insights][rds  pricing and data retention for performance insights] for
   RDS
+- [Exporting DB snapshot data to Amazon S3]
+- [I'm trying to export a snapshot from Amazon RDS MySQL to Amazon S3, but I'm receiving an error. Why is this happening?]
 
 <!--
   Reference
@@ -379,16 +392,20 @@ Examples:
 <!-- Upstream -->
 [access aws services through aws privatelink]: https://docs.aws.amazon.com/vpc/latest/privatelink/privatelink-access-aws-services.html
 [assumerole api reference]: https://docs.aws.amazon.com/STS/latest/APIReference/API_AssumeRole.html
+[aws icons]: https://aws-icons.com/
 [aws json policy elements: principal]: https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_elements_principal.html
 [best practices for tagging aws resources]: https://docs.aws.amazon.com/whitepapers/latest/tagging-best-practices/tagging-best-practices.html
 [connect to the internet using an internet gateway]: https://docs.aws.amazon.com/vpc/latest/userguide/VPC_Internet_Gateway.html
 [constraints  tag]: https://docs.aws.amazon.com/directoryservice/latest/devguide/API_Tag.html
 [creating a role to delegate permissions to an iam user]: https://docs.aws.amazon.com/IAM/latest/UserGuide/id_roles_create_for-user.html
 [elastic ip addresses]: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/elastic-ip-addresses-eip.html
+[exporting db snapshot data to amazon s3]: https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_ExportSnapshot.html
 [how can i monitor the account activity of specific iam users, roles, and aws access keys?]: https://repost.aws/knowledge-center/view-iam-history
 [how to use the passrole permission with iam roles]: https://aws.amazon.com/blogs/security/how-to-use-the-passrole-permission-with-iam-roles/
+[i'm trying to export a snapshot from amazon rds mysql to amazon s3, but i'm receiving an error. why is this happening?]: https://repost.aws/knowledge-center/rds-mysql-export-snapshot
 [iam json policy elements: sid]: https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_elements_sid.html
 [nat gateways]: https://docs.aws.amazon.com/vpc/latest/userguide/vpc-nat-gateway.html
+[not authorized to perform: sts:assumerole]: https://repost.aws/questions/QUOY5XngCtRyOX4Desaygz8Q/not-authorized-to-perform-sts-assumerole
 [rds  introduction to backups]: https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_WorkingWithAutomatedBackups.html
 [rds  pricing and data retention for performance insights]: https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_PerfInsights.Overview.cost.html
 [services that publish cloudwatch metrics]: https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/aws-services-cloudwatch-metrics.html
@@ -407,10 +424,8 @@ Examples:
 <!-- Others -->
 [automating dns-challenge based letsencrypt certificates with aws route 53]: https://johnrix.medium.com/automating-dns-challenge-based-letsencrypt-certificates-with-aws-route-53-8ba799dd207b
 [aws config tutorial by stephane maarek]: https://www.youtube.com/watch?v=qHdFoYSrUvk
-[aws icons]: https://aws-icons.com/
 [aws.permissions.cloud]: https://aws.permissions.cloud/
 [configuring ec2 disk alert using amazon cloudwatch]: https://medium.com/@chandinims001/configuring-ec2-disk-alert-using-amazon-cloudwatch-793807e40d72
 [date & time policy conditions at aws - 1-minute iam lesson]: https://www.youtube.com/watch?v=4wpKP1HLEXg
 [introduction to aws iam assumerole]: https://aws.plainenglish.io/introduction-to-aws-iam-assumerole-fbef3ce8e90b
-[not authorized to perform: sts:assumerole]: https://repost.aws/questions/QUOY5XngCtRyOX4Desaygz8Q/not-authorized-to-perform-sts-assumerole
 [you might be clueless as to why aws assume role isn't working, despite being correctly set up]: https://medium.com/@kamal.maiti/you-might-be-clueless-as-to-why-aws-assume-role-isnt-working-despite-being-correctly-set-up-1b3138519c07