Large file downloads (~2TB) from CephFS drop at ~100 GB

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Hello all,

I am experiencing a strange issue with downloads from a CephFS-backed environment and would like to ask if anyone has seen similar behavior.

When downloading large files (via wget or even directly through Firefox), the transfer speed is fine until the file size reaches roughly 100 GB. At that point, the session gets disconnected. This happens consistently, independent of the bandwidth available (e.g., whether the link runs at ~80 Mbit/s or ~230 Mbit/s). The only difference is how quickly the 100 GB “border” is reached.

After the disconnect, the download can usually be resumed, but the cutoff is very repeatable. Is there a configuration that needs to be done on the ceph site?

Best, Mevludin

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