Dell ObjectScale 1.3 Administration Guide

MPU allows you to upload huge objects by constructing a single, large object from uploaded smaller parts. You can upload these smaller parts at any time and in any order. Dell Technologies recommends that you verify that your request to complete MPU is successful. After ObjectScale receives the completeMPU request, ObjectScale assembles the parts and creates the object.

If the upload of one or more of the parts fails, you reupload only the failed part or parts.

1. Initiate the upload.
2. Upload the object parts.
3. Complete the multipart upload, which cleans up the uploaded parts and a new combined version is created.

For the best results, the part name numbering (partNumber) should be contiguous, beginning with 1 for the first object part. Each subsequent part number for the parts of the object should increment by whole numbers with no gaps in the numbering. Also, all parts should be the same size, with an exception for the last part, which can be smaller than the other parts. Deviations from these recommendations increase the metadata overhead and worsen performance.

MPU in ObjectScale has the following limits:

• The maximum size for a part is 5 GiB. There is no minimum size.
• The maximum supported size for an object is 50 TiB. There is no minimum size.
• The maximum number of parts for an MPU is 50,000.

Object part size and number of parts impact the time that it takes to upload and complete the creation of the combined object. Dell Technologies recommends that the part sizes be greater than 2.13 MiB and less than 2 GiB, for optimal processing.

See the ObjectScale Management Rest API .zip file on Dell Support at https://www.dell.com/support/home/en-us/product-support/product/objectscale/docs for the MPU APIs.