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Does Cloudflare R2 support chunk merging directly on the server?

EthanZouEthanZou Member
in General

Hi everyone,

I’m exploring Cloudflare R2 for a project and was wondering if it supports uploading file chunks (e.g., in a multi-part upload scenario) and merging them directly on R2. Essentially, instead of merging the chunks client-side or on an intermediary server, can the merging process happen directly within R2 after uploading the chunks?

Thanks in advance for any insights or documentation references!

Comments

  • indiankeshindiankesh Member

    Yes it natively supports multipart uploads with automatic server-side merging of chunks (5MB-5GB per part, max 10,000 parts) when you complete the upload, eliminating the need for client-side or intermediary server processing.

    https://developers.cloudflare.com/r2/objects/multipart-objects/

    Thanked by 2EthanZou vr10
  • EthanZouEthanZou Member

    @indiankesh said:
    Yes it natively supports multipart uploads with automatic server-side merging of chunks (5MB-5GB per part, max 10,000 parts) when you complete the upload, eliminating the need for client-side or intermediary server processing.

    https://developers.cloudflare.com/r2/objects/multipart-objects/

    Thank you so much for the quick and detailed response! That’s awesome! This feature is going to be a huge help in offloading work from my local web server — definitely saves a lot of effort and resources on our end. Really appreciate the info and the link!

  • indiankeshindiankesh Member

    @EthanZou said:

    @indiankesh said:
    Yes it natively supports multipart uploads with automatic server-side merging of chunks (5MB-5GB per part, max 10,000 parts) when you complete the upload, eliminating the need for client-side or intermediary server processing.

    https://developers.cloudflare.com/r2/objects/multipart-objects/

    Thank you so much for the quick and detailed response! That’s awesome! This feature is going to be a huge help in offloading work from my local web server — definitely saves a lot of effort and resources on our end. Really appreciate the info and the link!

    You're welcome. I use R2 very much and love it hence happy to answer.

  • EthanZouEthanZou Member

    @indiankesh said:

    @EthanZou said:

    @indiankesh said:
    Yes it natively supports multipart uploads with automatic server-side merging of chunks (5MB-5GB per part, max 10,000 parts) when you complete the upload, eliminating the need for client-side or intermediary server processing.

    https://developers.cloudflare.com/r2/objects/multipart-objects/

    Thank you so much for the quick and detailed response! That’s awesome! This feature is going to be a huge help in offloading work from my local web server — definitely saves a lot of effort and resources on our end. Really appreciate the info and the link!

    You're welcome. I use R2 very much and love it hence happy to answer.

    Thanks again!
    When comparing directly uploading and merging chunks on Cloudflare R2 versus handling chunk uploads and merging on a local web server before uploading to R2, and considering the costs of R2 API operations versus local server resources, do you think the former is more cost-effective overall? Would love to hear your perspective!

  • indiankeshindiankesh Member
    edited January 2025

    Well, IMHO, direct R2 multipart uploads are more cost-effective than local server handling due to eliminated infrastructure costs, zero egress fees, and generous free-tier allowances, despite slightly higher API operation costs.

  • EthanZouEthanZou Member

    @indiankesh said:
    Well, IMHO, direct R2 multipart uploads are more cost-effective than local server handling due to eliminated infrastructure costs, zero egress fees, and generous free-tier allowances, despite slightly higher API operation costs.

    Thanks so much for sharing your insights!

  • indiankeshindiankesh Member

    @EthanZou said:

    @indiankesh said:
    Well, IMHO, direct R2 multipart uploads are more cost-effective than local server handling due to eliminated infrastructure costs, zero egress fees, and generous free-tier allowances, despite slightly higher API operation costs.

    Thanks so much for sharing your insights!

    You're welcome.

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