MPIO - slow speed

Hello, mdgm.

Thanks for "the secret key" with two subnets - I've achived ~2*890mbps at READ with RND MPIO. Not so good as other vendors, but acceptable.

I think it will be better to add more MPIO specific information to ReadyNAS OS6 manual (and about supported LB policies too).

PS C:\> C:\SQLIO\sqlio.exe -s900 -kR -frandom -b8 -t8 -o16 -LS -BN D:\testfile.dat
sqlio v1.5.SG
using system counter for latency timings, 2474044 counts per second
8 threads reading for 900 secs from file D:\testfile.dat
        using 8KB random IOs
        enabling multiple I/Os per thread with 16 outstanding
        buffering set to not use file nor disk caches (as is SQL Server)
using current size: 1048576 MB for file: D:\testfile.dat
initialization done
CUMULATIVE DATA:
throughput metrics:
IOs/sec: 25979.92
MBs/sec:   202.96
latency metrics:
Min_Latency(ms): 0
Avg_Latency(ms): 4
Max_Latency(ms): 75
histogram:
ms: 0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24+
%: 10  9 11 12 11 13 11  9  9  2  1  1  1  1  1  0  0  0  0  0  0  0  0  0  0

but what's the mess with WRITE??!!

PS C:\> C:\SQLIO\sqlio.exe -s900 -kW -frandom -b8 -t8 -o16 -LS -BN D:\testfile.dat
sqlio v1.5.SG
using system counter for latency timings, 2474044 counts per second
8 threads writing for 900 secs to file D:\testfile.dat
        using 8KB random IOs
        enabling multiple I/Os per thread with 16 outstanding
        buffering set to not use file nor disk caches (as is SQL Server)
using current size: 1048576 MB for file: D:\testfile.dat
initialization done
CUMULATIVE DATA:
throughput metrics:
IOs/sec:    21.26
MBs/sec:     0.16
latency metrics:
Min_Latency(ms): 268
Avg_Latency(ms): 6005
Max_Latency(ms): 13647
histogram:
ms: 0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24+
%:  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0 100
PS C:\>

that is unacceptable!