Fabrizio, I ran the XrdClient test again. The end-of-file problem is resolved. Thank you. The relative performance for reading entire files sequentially is worthy of note, so I include it below. File Size Read without caching Reading with caching (bytes) (MB/s) (MB/s) 648,772 1.00 2.29 56,615,544 1.55 14.59 431,691,220 1.56 15.47 882,286,672 1.55 15.21 -- Gregory J. Sharp email: [log in to unmask] Wilson Synchrotron Laboratory url: http://www.lepp.cornell.edu/ ~gregor Cornell University ph: +1 607 255 4882 Ithaca, NY 14853 fax: +1 607 255 8062