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Dell HPC NFS Storage Solution High Availability Configurations with Large Capacities

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

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.

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Red Hat CLUSTER SUITE FOR ENTERPRISE LINUX 4.5 Manual do Utilizador Página 77