On the desktop system: $ find Mail -type f|wc -l 123719 # clamdscan --fdpass ~de5/Mail Time: 2137.531 sec (35 m 37 s) # clamdscan --fdpass ~de5/Mail Time: 2138.778 sec (35 m 38 s) So, still not seeing a benefit from the cache. Both of my test systems are RHEL 7, so off to try another platform. -Dave