I have to run clamav on large files. I was wondering which command was the fastest between clamscan and clamdscan.
But it seems that clamdscan is not working properly: it scans file larger than 1 GB.

Could you guys help me find why the heck clamdscan isn't working ? Between clamscan and clamdscan which one is less resource consuming ?

I run ClamAV 0.97.8/18037 on Ubuntu 12.04.3 LTS.

Please find below the execution result of both commands:

clamscan myfile.zip

----------- SCAN SUMMARY ----------- 
Known viruses: 2864504 
Engine version: 0.97.8 
Scanned directories: 0 
Scanned files: 1 
Infected files: 0 
Data scanned: 0.00 MB 
Data read: 1024.16 MB (ratio 0.00:1) 
Time: 9.145 sec (0 m 9 s)


clamdscan myfile.zip
/home/ubuntu/workspace/benchmark/myfile.zip: OK

----------- SCAN SUMMARY -----------
Infected files: 0
Time: 0.000 sec (0 m 0 s)

And here are the clamav log file:

Wed Oct 30 10:26:32 2013 -> Received POLLIN|POLLHUP on fd 4
Wed Oct 30 10:26:32 2013 -> Got new connection, FD 9
Wed Oct 30 10:26:32 2013 -> Received POLLIN|POLLHUP on fd 5
Wed Oct 30 10:26:32 2013 -> fds_poll_recv: timeout after 5 seconds
Wed Oct 30 10:26:32 2013 -> Received POLLIN|POLLHUP on fd 9
Wed Oct 30 10:26:32 2013 -> got command CONTSCAN /home/ubuntu/workspace/benchmark/myfile.zip (51, 7), argument: /home/ubuntu/workspace/benchmark/myfile.zip
Wed Oct 30 10:26:32 2013 -> mode -> MODE_WAITREPLY
Wed Oct 30 10:26:32 2013 -> Breaking command loop, mode is no longer MODE_COMMAND
Wed Oct 30 10:26:32 2013 -> Consumed entire command
Wed Oct 30 10:26:32 2013 -> Number of file descriptors polled: 1 fds
Wed Oct 30 10:26:32 2013 -> fds_poll_recv: timeout after 3600 seconds
Wed Oct 30 10:26:32 2013 -> THRMGR: queue (single) crossed low threshold -> signaling
Wed Oct 30 10:26:32 2013 -> THRMGR: queue (bulk) crossed low threshold -> signaling
Wed Oct 30 10:26:32 2013 -> /home/ubuntu/workspace/benchmark/myfile.zip: OK
Wed Oct 30 10:26:32 2013 -> Finished scanthread
Wed Oct 30 10:26:32 2013 -> Scanthread: connection shut down (FD 9)
Wed Oct 30 10:26:32 2013 -> THRMGR: queue (single) crossed low threshold -> signaling
Wed Oct 30 10:26:32 2013 -> THRMGR: queue (bulk) crossed low threshold -> signaling