Select your cookie preferences

We use essential cookies and similar tools that are necessary to provide our site and services. We use performance cookies to collect anonymous statistics, so we can understand how customers use our site and make improvements. Essential cookies cannot be deactivated, but you can choose “Customize” or “Decline” to decline performance cookies.

If you agree, AWS and approved third parties will also use cookies to provide useful site features, remember your preferences, and display relevant content, including relevant advertising. To accept or decline all non-essential cookies, choose “Accept” or “Decline.” To make more detailed choices, choose “Customize.”

Part

Focus mode
Part - Amazon Simple Storage Service

Container for elements related to a part.

Contents

ChecksumCRC32

The Base64 encoded, 32-bit CRC32 checksum of the part. This checksum is present if the object was uploaded with the CRC32 checksum algorithm. For more information, see Checking object integrity in the Amazon S3 User Guide.

Type: String

Required: No

ChecksumCRC32C

The Base64 encoded, 32-bit CRC32C checksum of the part. This checksum is present if the object was uploaded with the CRC32C checksum algorithm. For more information, see Checking object integrity in the Amazon S3 User Guide.

Type: String

Required: No

ChecksumCRC64NVME

The Base64 encoded, 64-bit CRC64NVME checksum of the part. This checksum is present if the multipart upload request was created with the CRC64NVME checksum algorithm, or if the object was uploaded without a checksum (and Amazon S3 added the default checksum, CRC64NVME, to the uploaded object). For more information, see Checking object integrity in the Amazon S3 User Guide.

Type: String

Required: No

ChecksumSHA1

The Base64 encoded, 160-bit SHA1 checksum of the part. This checksum is present if the object was uploaded with the SHA1 checksum algorithm. For more information, see Checking object integrity in the Amazon S3 User Guide.

Type: String

Required: No

ChecksumSHA256

The Base64 encoded, 256-bit SHA256 checksum of the part. This checksum is present if the object was uploaded with the SHA256 checksum algorithm. For more information, see Checking object integrity in the Amazon S3 User Guide.

Type: String

Required: No

ETag

Entity tag returned when the part was uploaded.

Type: String

Required: No

LastModified

Date and time at which the part was uploaded.

Type: Timestamp

Required: No

PartNumber

Part number identifying the part. This is a positive integer between 1 and 10,000.

Type: Integer

Required: No

Size

Size in bytes of the uploaded part data.

Type: Long

Required: No

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following:

On this page

PrivacySite termsCookie preferences
© 2025, Amazon Web Services, Inc. or its affiliates. All rights reserved.