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Wednesday, October 21, 2015

The right I/O tool to test disk performance - VDBENCH

Thanks to Henk Vandenbergh for developing this great tool.

Simple to use and a lot of resources and options. Works in almost all OS:

This example below was used in my mac laptop.


pportugal@dhcp-adc-twvpn-3-vpnpool-10-154-105-192 [] /Users/pportugal/Downloads/vdbench50403> ./vdbench -t


Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
Vdbench distribution: vdbench50403 Mon May 04  9:22:37 MDT 2015
For documentation, see 'vdbench.pdf'.

13:13:52.968 Created output directory '/Users/pportugal/Downloads/vdbench50403/output'
13:13:53.137 input argument scanned: '-f/var/folders/r5/v8vgh1v10z52rfn4b4nlsd8h0000gp/T/parmfile'
13:13:53.305 Starting slave: /Users/pportugal/Downloads/vdbench50403/vdbench SlaveJvm -m localhost -n localhost-10-151021-13.13.52.936 -l localhost-0 -p 5570
13:13:53.698 All slaves are now connected
13:13:53.805 Vdbench will attempt to expand a disk file if the requested file size is a multiple of 1mb
13:13:53.805 lun=/var/folders/r5/v8vgh1v10z52rfn4b4nlsd8h0000gp/T/quick_vdbench_test does not exist or is too small. host=localhost
13:13:55.002 Starting RD=SD_format; I/O rate: Uncontrolled MAX; elapsed=(none); For loops: threads=2 iorate=max
13:13:55.164 All sequential workloads on all slaves are done.
13:13:55.164 This triggers end of run inspite of possibly some non-sequential workloads that are still running.

Oct 21, 2015  interval        i/o   MB/sec   bytes   read     resp     read    write     resp     resp queue  cpu%  cpu%
                             rate  1024**2     i/o    pct     time     resp     resp      max   stddev depth sys+u   sys
13:13:56.088         1     320.00    40.00  131072   0.00    0.606    0.000    0.606   21.419    1.845   0.2   NaN   NaN
13:13:56.099   avg_1-1       0.00     0.00       0   0.00    0.000    0.000    0.000    0.000    0.000   0.0   NaN   NaN
13:13:57.001 Starting RD=rd1; I/O rate: 100; elapsed=5; For loops: None

Oct 21, 2015  interval        i/o   MB/sec   bytes   read     resp     read    write     resp     resp queue  cpu%  cpu%
                             rate  1024**2     i/o    pct     time     resp     resp      max   stddev depth sys+u   sys
13:13:58.011         1      74.00     0.07    1024  51.35    0.028    0.025    0.031    0.126    0.018   0.0   NaN   NaN
13:13:59.007         2     105.00     0.10    1024  53.33    0.029    0.025    0.033    0.073    0.013   0.0   NaN   NaN
13:14:00.007         3     105.00     0.10    1024  49.52    0.026    0.022    0.029    0.052    0.012   0.0   NaN   NaN
13:14:01.006         4     107.00     0.10    1024  51.40    0.026    0.023    0.029    0.067    0.013   0.0   NaN   NaN
13:14:02.022         5      96.00     0.09    1024  54.17    0.027    0.025    0.029    0.081    0.012   0.0   NaN   NaN
13:14:02.046   avg_2-5     103.25     0.10    1024  52.06    0.027    0.024    0.030    0.081    0.012   0.0   NaN   NaN
13:14:03.002 Vdbench execution completed successfully. Output directory: /Users/pportugal/Downloads/vdbench50403/output

pportugal@dhcp-adc-twvpn-3-vpnpool-10-154-105-192 [] /Users/pportugal/Downloads/vdbench50403>




Best Regards,
Paulo Portugal

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