Administrator Guide

References
49 Dell EMC Ready Solution for HPC PixStor Storage | Document ID
Benchmark Reference
This section describes the commands that were used to benchmark the DellEMC HPC Storage solutions.
IOzone
The following commands are examples to run sequential and random IOzone tests, the results of which are
recorded in Performance evaluation.
For sequential writes:
iozone -i 0 -c -e -w -r 1024K -s $Size -t $Thread -+n -+m /path/to/threadlist
For sequential reads:
iozone -i 1 -c -e -w -r 1024K -s $Size -t $Thread -+n -+m /path/to/threadlist
For IOPS random reads/writes:
iozone -i 2 -w -c -O -I -r 4K -s $Size -t $Thread -+n -+m /path/to/threadlist
Table 12 describes the IOzone command line options. The O_Direct command line option, -I, enables us to
bypass the cache on the compute nodes where the IOzone threads are running.
Table 12 IOzone command line options
Option
Description
-i 0
Write test
-I 1
Read test
-I 2
Random IOPS test
-+n
No retest
-c
Includes close in the timing calculations
-e
Includes flush in the timing calculations
-r
Records size
-s
File size
-+m
Location of clients to run IOzone on when in clustered mode
-I
Use O_Direct
-w
Does not unlink (delete) temporary file
-O
Return results in OPS