Frankly, varioous options introduce their own peculiar side effects that
may make the system annoying enough that people simply consider it broken
and move on. In this particular case the simplest solution is to limit the
number of TPC requests that can happen at the same time. We did that right
off the bat for xroot TPC and that worked really well. I am suprised that
no such limit was envisioned for the http side. Saying they share the same
storage is, in my opinion, architecturally misguided and very much
complicates the whole storage backend when a simple solution exists.

Andy

On Tue, 1 Feb 2022, Alessandra Forti wrote:

> Hi Brian,
>
>> 4: This was recently added to the throttling plugin. I think the filesystem level is an appropriate place to put limits given that the storage resources are shared between HTTP and XRootD.
>
> A transfer protocol should have the option to limit the number of connections to the server that it serves the data from. I think limiting the file system assumes the file system isn't supporting other applications.
>
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