Did you mean in the client or server side?
In the client, XrdCl::File::VectorRead is what is invoked by various applications (e.g., ROOT) in order to trigger a vector read.
I don't believe xrdcp ever invokes a vector read.
> On Dec 10, 2020, at 11:35 AM, Patargias, George (STFC,RAL,SC) <[log in to unmask]
> Me and Ian are working in RAL on the implementation of vector reads in the XRootD Ceph plugin.
> Can you please point us to the part of the XRootD code (XrdCl or...) that groups many individual small reads from the same
> file into a single vector (XrdOucIOVec) which is eventually passed to the ReadV(XrdOucIOVec *readV, int rdvcnt) function
> in XrdOss/XrdOss.cc?
> Is this vectorisation enabled by default in the case of many reads from the same file (didn't see any xrdcp flag that serves this purpose)?
> Many thanks,
> George Patargias
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