HP VMA Series Installation And Service Manual page 178

Chapter 10 - Performance Tuning and Troubleshooting
# perf_test -s 384 -R -t4 -b 16384 -w1 -r0 -d5 -p /dev/rdsk/vtms2v1
Running with options:
threads
block_size
memory size
memory start addr
write:read ratio
random mode
duration
path
MB
Time (sec) Read BW
1 0.000 MB/s 1005.936 MB/s
2 0.000 MB/s 1005.924 MB/s
3 0.000 MB/s 1006.266 MB/s
4 0.000 MB/s 1006.104 MB/s
5 0.000 MB/s 1006.594 MB/s
Average 0.000 MB/s 1006.165 MB/s
178
In the following example, a performance test is run to check write bandwidth
using the
-w1 -r0
= 4
= 16384
= 393216 MB
= 0 MB
= 1:0
= 1
= 5 secs
= /dev/rdsk/vtms2v1
= 1000000 bytes
Write BW Total BW
1005.936 MB/s 0
1005.924 MB/s 0
1006.266 MB/s 0
1006.104 MB/s 0
1006.594 MB/s 0
1006.165 MB/s 0
The Memory Array write bandwidth reaches a maximum of roughly 1 GB/s on
x8 PCIe.
VMA-series Memory Array Installation and Service Guide
options to place the write to read ratio at 1:0.
Read IOPS Write IOPS Total IOPS
61397 61397
61396 61396
61417 61417
61407 61407
61437 61437
61410 61410
HP-AM456-9002A Rev 01