Using standard PAT:

• PAT_WN08_PSI_network_1file_1_commented.png: "srmcp" is the copy to local area of a file from the SE (196 MB), can be used as reference
  

• PAT_WN08_PSI_network_10kevts_CACHE20_patch4_commented.png:
  

seems that using rh auto-detect for dcache selects the buffering:

http://cmslxr.fnal.gov/lxr/source/Utilities/DCacheAdaptor/plugins/DCacheStorageMaker.cc#038

http://cmslxr.fnal.gov/lxr/source/Utilities/DCacheAdaptor/src/DCacheFile.cc#132

126   // Turn off read-ahead, or adjust read-ahead size depending on
127   // whether buffering has been requested.  This is a very tricky
128   // balance here.  Without read-ahead data processing appears to
129   // become exceedingly slow, and with default (1MB) read-ahead
130   // it appears to saturate disk servers and network.  Try tread
131   // reasonable middle ground here.
132   if (flags & IOFlags::OpenUnbuffered)
133     dc_noBuffering(m_fd);
134   else
135     dc_setBufferSize(m_fd, 64000);
136 

-- LeonardoSala - 22-Jan-2010