Red Hat CLUSTER SUITE FOR ENTERPRISE LINUX 4.5 Instrukcja Użytkownika Pobierz pdf (Strona 77)

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 Instrukcja Użytkownika Strona 77