S3 Replication Flashcards
What is Cross-Region Replication (CRR) in Amazon S3?
Cross-Region Replication (CRR) is an Amazon S3 feature that replicates data across buckets in different AWS regions, offering enhanced data availability and cross-region redundancy.
What is the purpose of Same-Region Replication (SRR) in Amazon S3?
Same-Region Replication (SRR) is used to replicate objects within the same AWS region between two buckets. It’s useful for aggregating logs or copying data to a production environment from a staging area.
In what scenario would you use Cross-Region Replication (CRR)?
Use CRR when you need to meet compliance requirements, minimize latency by serving data in geographic proximity to users, or maintain data redundancy across distinct geographical locations.
When is Same-Region Replication (SRR) most beneficial?
SRR is beneficial when you need to create a live replication of data for operational recovery or backup within the same region, or when you want to replicate data to different storage classes for processing.
How does S3 replication handle versioning?
Both CRR and SRR require source and destination buckets to have versioning enabled. Replication copies all versions of an object, including all future versions, once the rule is set up.
Can S3 replication be set up between two accounts?
Yes, S3 replication can be configured between buckets owned by different AWS accounts, enhancing collaboration between business units or for cross-account backup strategies.
What happens to existing objects in the source bucket when replication is first enabled?
Existing objects in the source bucket are not automatically replicated when replication is first enabled. Replication applies only to objects created or updated after the setup of the replication rule.
Are there any limitations to what can be replicated with S3’s replication features?
Yes, there are limitations. For example, S3 does not replicate objects that are not publicly accessible due to legal holds or objects encrypted with customer-provided keys (SSE-C).
How can you monitor the status of S3 replication?
You can monitor S3 replication status through S3 replication metrics and notifications using Amazon CloudWatch to track the progress and success of replication tasks.
What is Replication Time Control (RTC) in the context of Amazon S3?
Replication Time Control (RTC) is an optional feature that provides a predictable replication time backed by a service level agreement (SLA). It ensures that 99.9% of objects are replicated within 15 minutes after upload.
