OK, here’s the deal. We just installed 2 new win2k3 servers clustered and were migrating from an old win2k3 server all files and shares. All 3 servers are located on a cisco gig switch. Cluster servers will be considered server A and B. Old server will be server C. Some clients are really slow connecting to servers A and B. Decent speeds connecting to server C. Here are some tests with ttcpw.exe, the utility that cisco uses.
Server A ? Host 1
C:\>ttcpw -t -s *Host 1*
ttcp-t: buflen=8192, nbuf=2048, align=16384/0, port=5001 tcp -> *Host 1*
ttcp-t: socket
ttcp-t: connect
ttcp-t: 16777216 bytes in 66.33 seconds = 247.01 KB/sec +++
ttcp-t: 2048 I/O calls, msec/call = 33.16, calls/sec = 30.88
ttcp-t:
C:\>ttcpw -r -s
ttcp-r: buflen=8192, nbuf=2048, align=16384/0, port=5001 tcp
ttcp-r: socket
ttcp-r: accept from *Host 1*
ttcp-r: 16777216 bytes in 15.11 seconds = 1084.39 KB/sec +++
ttcp-r: 2235 I/O calls, msec/call = 6.92, calls/sec = 147.93
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Server A ? Host 2
C:\>ttcpw -r -s
ttcp-r: buflen=8192, nbuf=2048, align=16384/0, port=5001 tcp
ttcp-r: socket
ttcp-r: accept from *Host 2*
ttcp-r: 16777216 bytes in 1.44 seconds = 11401.53 KB/sec +++
ttcp-r: 2775 I/O calls, msec/call = 0.53, calls/sec = 1931.11
ttcp-r:
C:\>ttcpw -t -s *Host 2*
ttcp-t: buflen=8192, nbuf=2048, align=16384/0, port=5001 tcp -> *Host 2*
ttcp-t: socket
ttcp-t: connect
ttcp-t: 16777216 bytes in 1.42 seconds = 11521.80 KB/sec +++
ttcp-t: 2048 I/O calls, msec/call = 0.71, calls/sec = 1440.23
ttcp-t:
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Server C – Host 1
U:\>ttcpw -t -s *Host 1*
ttcp-t: buflen=8192, nbuf=2048, align=16384/0, port=5001 tcp -> *Host 1*
ttcp-t: socket
ttcp-t: connect
ttcp-t: 16777216 bytes in 23.83 seconds = 687.59 KB/sec +++
ttcp-t: 2048 I/O calls, msec/call = 11.91, calls/sec = 85.95
ttcp-t:
U:\>ttcpw -r -s
ttcp-r: buflen=8192, nbuf=2048, align=16384/0, port=5001 tcp
ttcp-r: socket
ttcp-r: accept from *Host 1*
ttcp-r: 16777216 bytes in 15.14 seconds = 1082.09 KB/sec +++
ttcp-r: 2084 I/O calls, msec/call = 7.44, calls/sec = 137.64
ttcp-r:
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Server A – Host 1
U:\>ttcpw -t -s *Host 1*
ttcp-t: buflen=8192, nbuf=2048, align=16384/0, port=5001 tcp -> *Host 1*
ttcp-t: socket
ttcp-t: connect
ttcp-t: 16777216 bytes in 82.91 seconds = 197.62 KB/sec +++
ttcp-t: 2048 I/O calls, msec/call = 41.45, calls/sec = 24.70
ttcp-t:
U:\>ttcpw -r -s
ttcp-r: buflen=8192, nbuf=2048, align=16384/0, port=5001 tcp
ttcp-r: socket
ttcp-r: accept from *Host 1*
ttcp-r: 16777216 bytes in 15.13 seconds = 1083.24 KB/sec +++
ttcp-r: 2256 I/O calls, msec/call = 6.87, calls/sec = 149.16
ttcp-r: