[Proftpd-user] PUT Performance Good/GET Performance Bad

[MandMH <reg...@ha...>]

I'm running a benchmark & have some questions.  I'd be happy to turn over my 
findings & raw data to this forum if it would help.  Here's my situation...

Server Under Test:
     Running PROftpd 1.2.1
     Solaris 9 09/2002, Properly Patched
     Gigabit Ethernet private network (single cable) to client
     Sun F6800 Server w/ 4 x 750Mhz CPUs, 8GB RAM

 From the client (Sun V880 Server w/ 4 x 750Mhz CPUs & 8GB RAM), I initited 10 
concurrent PUTs of a 750MB file to the server.  I'm getting approximately 
77MB/sec transfer rate, I'm pretty happy w/ this.  I've tuned some TCP 
parameters w/ ndd, but I'm running w/ the default proftpd.conf file.

What puzzles me, is the GET performance.  I kick off 10 concurrent GETS to pull 
10 unique 750MB files from the server & drop them into /dev/null (get xxx 
/dev/null).  The performance drops to 45MB/sec.

Any ideas?

Interestingly, I re-activated the default ftpd that comes w/ Solaris.  When I 
initiated the same "GET" test, it performed @ 80MB/sec.  That made me think 
there might me some issues w/ the get implementation on the proftpd server.

Any assistance is greatly appreciated.  Thanks,

Matt