HP VMA-series Memory Arrays Manual do Utilizador descarregar pdf (Página 178)

Chapter 10 - Performance Tuning and Troubleshooting

178

VMA-series Memory Array Installation and Service Guide

HP-AM456-9002A Rev 01

In the following example, a performance test is run to check write bandwidth

using the

-w1 -r0 options to place the write to read ratio at 1:0.

The Memory Array write bandwidth reaches a maximum of roughly 1 GB/s on

x8 PCIe.

# perf_test -s 384 -R -t4 -b 16384 -w1 -r0 -d5 -p /dev/rdsk/vtms2v1

Running with options:

threads = 4

block_size = 16384

memory size = 393216 MB

memory start addr = 0 MB

write:read ratio = 1:0

random mode = 1

duration = 5 secs

path = /dev/rdsk/vtms2v1

MB = 1000000 bytes

Time (sec) Read BW Write BW Total BW Read IOPS Write IOPS Total IOPS

1 0.000 MB/s 1005.936 MB/s 1005.936 MB/s 0 61397 61397

2 0.000 MB/s 1005.924 MB/s 1005.924 MB/s 0 61396 61396

3 0.000 MB/s 1006.266 MB/s 1006.266 MB/s 0 61417 61417

4 0.000 MB/s 1006.104 MB/s 1006.104 MB/s 0 61407 61407

5 0.000 MB/s 1006.594 MB/s 1006.594 MB/s 0 61437 61437

Average 0.000 MB/s 1006.165 MB/s 1006.165 MB/s 0 61410 61410

1 2 ... 173 174 175 176 177 178 179 180 181 182 183 ... 299 300

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HP VMA-series Memory Arrays Manual do Utilizador Página 178