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Dell HPC NFS Storage Solution High Availability Configurations with Large Capacities
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The following table describes the IOZone command line arguments.
IOzone ARGUMENT
DESCRIPTION
-i 0
Write test
-i 1
Read test
-i 2
Random Access test
-+n
No retest
-c
Includes close in the timing calculations
-t
Number of Threads
-e
Includes flush in the timing calculations
-r
Records size
-s
File size
-t
Number of Threads
+m
Location of clients to run IOzone on when in clustered
mode
-w
Does not unlink (delete) temporary file
-I
Use O_DIRECT, bypass client cache
-O
Give results in ops/sec.
For the sequential tests, file size was varied along with the number of clients such that the total
amount of data written was 128G (number of clients * file size per client = 128G).
IOzone Sequential Writes
# /usr/sbin/iozone -i 0 -c –e –w –r 1024k –s 2g –t 64 -+n -+m ./clientlist
IOzone Sequential Reads
# /usr/sbin/iozone -i 1 -c -e -w -r 1024k -s 2g -t 64 -+n -+m ./clientlist
For the random tests, each client read or wrote a 2G file. The record size used for the random tests
was 4k to simulate small random data accesses.