Replication status can help you determine the current state of an object being replicated. The replication status of a source object will return either PENDING, COMPLETED, or FAILED. The replication status of a replica will return REPLICA.
You can also use replication status values when you're creating S3 Batch Replication jobs. For example, you can use these status values to replicate objects that have either never been replicated or that have failed replication. For more information about using these values with Batch Replication, see Using replication status information with Batch Replication jobs.
Replication status overviewIn replication, you have a source bucket on which you configure replication and one or more destination buckets where Amazon S3 replicates objects. When you request an object (by using GetObject) or object metadata (by using HeadObject) from these buckets, Amazon S3 returns the x-amz-replication-status header in the response:
When you request an object from the source bucket, Amazon S3 returns the x-amz-replication-status header if the object in your request is eligible for replication.
For example, suppose that you specify the object prefix TaxDocs in your replication configuration to tell Amazon S3 to replicate only objects with the key name prefix TaxDocs. Any objects that you upload that have this key name prefixâfor example, TaxDocs/document1.pdfâwill be replicated. For object requests with this key name prefix, Amazon S3 returns the x-amz-replication-status header with one of the following values for the object's replication status: PENDING, COMPLETED, or FAILED.
If object replication fails after you upload an object, you can't retry replication. You must upload the object again, or you must use S3 Batch Replication to replicate any failed objects. For more information about using Batch Replication, see Replicating existing objects with Batch Replication.
Objects transition to a FAILED state for issues such as missing replication role permissions, AWS Key Management Service (AWS KMS) permissions, or bucket permissions. For temporary failures, such as if a bucket or Region is unavailable, replication status doesn't transition to FAILED, but remains PENDING. After the resource is back online, Amazon S3 resumes replicating those objects.
When you request an object from a destination bucket, if the object in your request is a replica that Amazon S3 created, Amazon S3 returns the x-amz-replication-status header with the value REPLICA.
Before deleting an object from a source bucket that has replication enabled, check the object's replication status to make sure that the object has been replicated.
If an S3 Lifecycle configuration is enabled on the source bucket, Amazon S3 suspends lifecycle actions until it marks the objects' status as either COMPLETED or FAILED.
When you replicate objects to multiple destination buckets, the x-amz-replication-status header acts differently. The header of the source object returns a value of COMPLETED only when replication is successful to all destinations. The header remains at the PENDING value until replication has completed for all destinations. If one or more destinations fail replication, the header returns FAILED.
When your replication rules enable Amazon S3 replica modification sync, replicas can report statuses other than REPLICA. If metadata changes are in the process of replicating, the x-amz-replication-status header returns PENDING. If replica modification sync fails to replicate metadata, the header returns FAILED. If metadata is replicated correctly, the replicas return the header REPLICA.
When creating a Batch Replication job, you can optionally specify additional filters, such as the object creation date and replication status, to reduce the scope of the job.
You can filter objects to replicate based on the ObjectReplicationStatuses value, by providing one or more of the following values:
"NONE" â Indicates that Amazon S3 has never attempted to replicate the object before.
"FAILED" â Indicates that Amazon S3 has attempted, but failed, to replicate the object before.
"COMPLETED" â Indicates that Amazon S3 has successfully replicated the object before.
"REPLICA" â Indicates that this is a replica object that Amazon S3 has replicated from another source.
For more information about using these replication status values with Batch Replication, see Filters for a Batch Replication job.
Finding replication statusTo get the replication status of the objects in a bucket, you can use the Amazon S3 Inventory tool. Amazon S3 sends a CSV file to the destination bucket that you specify in the inventory configuration. You can also use Amazon Athena to query the replication status in the inventory report. For more information about Amazon S3 Inventory, see Cataloging and analyzing your data with S3 Inventory.
You can also find the object replication status by using the Amazon S3 console, the AWS Command Line Interface (AWS CLI), or the AWS SDK.
In the Amazon S3 console, you can view the replication status for an object on the object's details page.
Sign in to the AWS Management Console and open the Amazon S3 console at https://console.aws.amazon.com/s3/.
In the left navigation pane, choose Buckets.
In the General purpose buckets list, choose the name of the replication source bucket.
In the Objects list, choose the object name. The object's details page appears.
On the Properties tab, scroll down to the Object management overview section. Under Management configurations, see the value under Replication status.
Use the AWS Command Line Interface (AWS CLI) head-object command to retrieve object metadata, as shown in the following example. Replace the amzn-s3-demo-source-bucket1user input placeholders
aws s3api head-object --bucket amzn-s3-demo-source-bucket1 --key object-key --version-id object-version-id The command returns object metadata, including the ReplicationStatus as shown in the following example response.
{
"AcceptRanges":"bytes",
"ContentType":"image/jpeg",
"LastModified":"Mon, 23 Mar 2015 21:02:29 GMT",
"ContentLength":3191,
"ReplicationStatus":"COMPLETED",
"VersionId":"jfnW.HIMOfYiD_9rGbSkmroXsFj3fqZ.",
"ETag":"\"6805f2cfc46c0f04559748bb039d69ae\"",
"Metadata":{
}
}The following code fragments get your replication status by using the AWS SDK for Java and AWS SDK for .NET, respectively.
GetObjectMetadataRequest metadataRequest = new GetObjectMetadataRequest(bucketName, key);
ObjectMetadata metadata = s3Client.getObjectMetadata(metadataRequest);
System.out.println("Replication Status : " + metadata.getRawMetadataValue(Headers.OBJECT_REPLICATION_STATUS));GetObjectMetadataRequest getmetadataRequest = new GetObjectMetadataRequest
{
BucketName = sourceBucket,
Key = objectKey
};
GetObjectMetadataResponse getmetadataResponse = client.GetObjectMetadata(getmetadataRequest);
Console.WriteLine("Object replication status: {0}", getmetadataResponse.ReplicationStatus);RetroSearch is an open source project built by @garambo | Open a GitHub Issue
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