Large backup in aws without setting multiPartChunkSize stops at 50Gi

[pando85]

What steps did you take and what happened: I just try to do a backup of a ZFS volume bigger than 50Gi and it crashes saying that:

caused by: TotalPartsExceeded: exceeded total allowed configured MaxUploadParts (10000). Adjust PartSize to fit in this limit"

What did you expect to happen: With multiPartChunkSize not set up it should calculate partSize automatically but it seems that it took 5Mi as default value.

Anything else you would like to add: [Miscellaneous information that will assist in solving the issue.] I fixed it setting it explicitly to a bigger value.

Environment:

• Velero version (use velero version):

  velero version
  Client:
  Version: v1.13.0
  Git commit: 76670e940c52880a18dbbc59e3cbee7b94cd3352
  Server:
  Version: v1.13.0

• Velero features (use velero client config get features):

  velero client config get features
  features: <NOT SET>

• Velero-plugin version: 3.6.0
• OpenEBS version: zfs-localpv-2.4.0
• Kubernetes version (use kubectl version): Server Version: v1.28.6+k3s
• Kubernetes installer & version: Custom ansible installer: https://github.com/pando85/homelab/tree/master/metal
• Cloud provider or hardware configuration: https://github.com/pando85/homelab/?tab=readme-ov-file#-hardware
• OS (e.g. from /etc/os-release):

  PRETTY_NAME="Ubuntu 22.04.3 LTS"
  NAME="Ubuntu"
  VERSION_ID="22.04"
  VERSION="22.04.3 LTS (Jammy Jellyfish)"
  VERSION_CODENAME=jammy
  ID=ubuntu
  ID_LIKE=debian
  HOME_URL="https://www.ubuntu.com/"
  SUPPORT_URL="https://help.ubuntu.com/"
  BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
  PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
  UBUNTU_CODENAME=jammy