Overview

To replicate an object that is greater than 5 GB in size, you must use multipart copy. First, use the multipart upload API to create an object. Then use the Upload Part - Copy API and specify the x-cos-copy-source header to determine the source object that you want to copy. The process is outlined below:

1. Initialize an object for multipart upload.
2. Copy the data of the source object; specify the x-cos-copy-source-range header to determine how much data to copy at a time (you can specify to copy up to 5 GB at a time).
3. Complete the multipart upload.

Note：

The SDKs provided by COS can be used to easily implement a multipart copy operation.

Directions

Using REST APIs

You can use REST APIs to directly initiate a multipart copy request. For more information, see the following API documentation:

• Initiate Multipart Upload
• Upload Part - Copy
• Complete Multipart Upload
• Abort Multipart Upload

Using SDKs

You can also use multipart copy directly through SDKs. For more information, see the language-specific SDK documentation below:

• Android SDK
• C++ SDK
• iOS SDK
• Java SDK
• JavaScript SDK
• Node.js SDK
• PHP SDK
• Python SDK