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

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I’m a bit uncertain by the OP’s phrasing.

The Subject header mentions CephFS, but the description mentions Firefox and wget, which sound more like RGW.

If the latter, perhaps this threshold is a function of the load balancing layer having a payload size limit or timeout?

> On Aug 24, 2025, at 3:02 PM, Janne Johansson <icepic.dz@xxxxxxxxx> wrote:
> 
> Is it possible that the software serving the content has a limit you run
> into?
> 
> 
> May the most significant bit of your life be positive.
> 
> Den sön 24 aug. 2025 13:08Mevludin Blazevic <mejdibl@xxxxxxxxx> skrev:
> 
>> 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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