Red Hat CLUSTER SUITE FOR ENTERPRISE LINUX 4.5 Instrukcja Użytkownika Pobierz pdf (Strona 78)

Dell HPC NFS Storage Solution High Availability Configurations with Large Capacities

IOzone IOPs Random Access (Reads and Writes)

# /usr/sbin/iozone -i 2 -w -r 4k -I -O -w -+n -s 2G -t 1 -+m ./clientlist

By using -c and -e in the test, IOzone provides a more realistic view of what a typical application is

doing. The O_Direct command line parameter allows us to bypass the cache on the compute node on

which we are running the IOzone thread.

B.2. mdtest

mdtest can be downloaded from http://sourceforge.net/projects/mdtest/. Version 1.8.3 was used in

these tests. It was compiled and installed on a NFS share that was accessible by compute nodes.

dtest is launched with mpirun. For these tests, MPICH2 version 1.3.2 was used. The following table

describes the mdtest command line arguments.

mpirun ARGUMENT

DESCRIPTION

-np

Number of Processes

--nolocal

Instructs mpirun not to run locally

--hostfile

Tells mpirun where the hostfile is

mdtest ARGUMENT

DESCRIPTION

-d

The directory mdtest should run in

-i

The number of iterations the test will run

-b

Branching factor of directory structure

-z

Depth of the directory structure

-L

Files only at leaf level of tree

-I

Number of files per directory tree

-y

Sync the file after writing

-u

unique working directory for each task

-C

Create files and directories

-R

Randomly stat files

-T

Only stat files and directories

-r

Remove files and directories left over from run

1 2 ... 73 74 75 76 77 78 79 80

Komentarze do niniejszej Instrukcji

Brak uwag

Red Hat CLUSTER SUITE FOR ENTERPRISE LINUX 4.5 Instrukcja Użytkownika Strona 78

Komentarze do niniejszej Instrukcji

Powiązane produkty i podręczniki dla Serwery Red Hat CLUSTER SUITE FOR ENTERPRISE LINUX 4.5