Restores an archived copy of an object back into Amazon S3
This action is not supported by Amazon S3 on Outposts.
This action performs the following types of requests:
select - Perform a select query on an archived object
restore an archive - Restore an archived object
To use this operation, you must have permissions to perform the
s3:RestoreObject action. The bucket owner has this permission by default
and can grant this permission to others. For more information about permissions, see Permissions Related to Bucket Subresource Operations and Managing Access Permissions to Your Amazon S3
Resources in the Amazon S3 User Guide.
Querying Archives with Select Requests
You use a select type of request to perform SQL queries on archived objects. The archived objects that are being queried by the select request must be formatted as uncompressed comma-separated values (CSV) files. You can run queries and custom analytics on your archived data without having to restore your data to a hotter Amazon S3 tier. For an overview about select requests, see Querying Archived Objects in the Amazon S3 User Guide.
When making a select request, do the following:
Define an output location for the select query's output. This must be an Amazon S3 bucket in the same Amazon Web Services Region as the bucket that contains the archive object that is being queried. The Amazon Web Services account that initiates the job must have permissions to write to the S3 bucket. You can specify the storage class and encryption for the output objects stored in the bucket. For more information about output, see Querying Archived Objects in the Amazon S3 User Guide.
For more information about the
S3 structure in the request body, see
Define the SQL expression for the
SELECT type of restoration for your
query in the request body's
SelectParameters structure. You can use
expressions like the following examples.
The following expression returns all records from the specified object.
SELECT * FROM Object
Assuming that you are not using any headers for data stored in the object, you can specify columns with positional headers.
SELECT s._1, s._2 FROM Object s WHERE s._3 > 100
If you have headers and you set the
fileHeaderInfo in the
CSV structure in the request body to
USE, you can
specify headers in the query. (If you set the
IGNORE, the first row is skipped for the query.) You cannot mix
ordinal positions with header column names.
SELECT s.Id, s.FirstName, s.SSN FROM S3Object s
For more information about using SQL with S3 Glacier Select restore, see SQL Reference for Amazon S3 Select and S3 Glacier Select in the Amazon S3 User Guide.
When making a select request, you can also do the following:
To expedite your queries, specify the
Expedited tier. For more
information about tiers, see "Restoring Archives," later in this topic.
Specify details about the data serialization format of both the input object that is being queried and the serialization of the CSV-encoded query results.
The following are additional important facts about the select feature:
The output results are new Amazon S3 objects. Unlike archive retrievals, they are stored until explicitly deleted-manually or through a lifecycle policy.
You can issue more than one select request on the same Amazon S3 object. Amazon S3 doesn't deduplicate requests, so avoid issuing duplicate requests.
Amazon S3 accepts a select request even if the object has already been restored. A
select request doesn’t return error response
Objects that you archive to the S3 Glacier or S3 Glacier Deep Archive storage class, and S3 Intelligent-Tiering Archive or S3 Intelligent-Tiering Deep Archive tiers are not accessible in real time. For objects in Archive Access or Deep Archive Access tiers you must first initiate a restore request, and then wait until the object is moved into the Frequent Access tier. For objects in S3 Glacier or S3 Glacier Deep Archive storage classes you must first initiate a restore request, and then wait until a temporary copy of the object is available. To access an archived object, you must restore the object for the duration (number of days) that you specify.
To restore a specific object version, you can provide a version ID. If you don't provide a version ID, Amazon S3 restores the current version.
When restoring an archived object (or using a select request), you can specify one of
the following data access tier options in the
Tier element of the request
- Expedited retrievals
allow you to quickly access your data stored in the S3 Glacier
storage class or S3 Intelligent-Tiering Archive tier when occasional urgent requests for a
subset of archives are required. For all but the largest archived objects (250 MB+),
data accessed using Expedited retrievals is typically made available within 1–5
minutes. Provisioned capacity ensures that retrieval capacity for Expedited
retrievals is available when you need it. Expedited retrievals and provisioned
capacity are not available for objects stored in the S3 Glacier Deep Archive
storage class or S3 Intelligent-Tiering Deep Archive tier.
- Standard retrievals allow
you to access any of your archived objects within several hours. This is the default
option for retrieval requests that do not specify the retrieval option. Standard
retrievals typically finish within 3–5 hours for objects stored in the
S3 Glacier storage class or S3 Intelligent-Tiering Archive tier. They
typically finish within 12 hours for objects stored in the
S3 Glacier Deep Archive storage class or S3 Intelligent-Tiering Deep Archive tier.
Standard retrievals are free for objects stored in S3 Intelligent-Tiering.
- Bulk retrievals are the
lowest-cost retrieval option in S3 Glacier, enabling you to retrieve large amounts,
even petabytes, of data inexpensively. Bulk retrievals typically finish within 5–12
hours for objects stored in the S3 Glacier storage class or
S3 Intelligent-Tiering Archive tier. They typically finish within 48 hours for objects stored
in the S3 Glacier Deep Archive storage class or S3 Intelligent-Tiering Deep Archive tier.
Bulk retrievals are free for objects stored in S3 Intelligent-Tiering.
For more information about archive retrieval options and provisioned capacity for
Expedited data access, see Restoring Archived Objects in the Amazon S3 User Guide.
You can use Amazon S3 restore speed upgrade to change the restore speed to a faster speed while it is in progress. For more information, see Upgrading the speed of an in-progress restore in the Amazon S3 User Guide.
To get the status of object restoration, you can send a
Operations return the
x-amz-restore header, which provides information about
the restoration status, in the response. You can use Amazon S3 event notifications to notify you
when a restore is initiated or completed. For more information, see Configuring Amazon S3 Event Notifications in
the Amazon S3 User Guide.
After restoring an archived object, you can update the restoration period by reissuing the request with a new period. Amazon S3 updates the restoration period relative to the current time and charges only for the request-there are no data transfer charges. You cannot update the restoration period when Amazon S3 is actively processing your current restore request for the object.
If your bucket has a lifecycle configuration with a rule that includes an expiration action, the object expiration overrides the life span that you specify in a restore request. For example, if you restore an object copy for 10 days, but the object is scheduled to expire in 3 days, Amazon S3 deletes the object in 3 days. For more information about lifecycle configuration, see PutBucketLifecycleConfiguration and Object Lifecycle Management in Amazon S3 User Guide.
A successful action returns either the
200 OK or
Accepted status code.
If the object is not previously restored, then Amazon S3 returns
Accepted in the response.
If the object is previously restored, Amazon S3 returns
200 OK in the
Cause: Object restore is already in progress. (This error does not apply to SELECT type requests.)
HTTP Status Code: 409 Conflict
SOAP Fault Code Prefix: Client
Cause: expedited retrievals are currently not available. Try again later. (Returned if there is insufficient capacity to process the Expedited request. This error applies only to Expedited retrievals and not to S3 Standard or Bulk retrievals.)
HTTP Status Code: 503
SOAP Fault Code Prefix: N/A