MATLAB DISTRIBUTED COMPUTING SERVER 4 - SYSTEM ADMINISTRATORS GUIDE Instrukcja Użytkownika Pobierz pdf (Strona 22)

2 Netw ork Administration

Security Consid

erations

The parallel com

puting products do not provide any security measures.

Therefore, be aw

are of the following security considerations:

• MATLAB workers

run as whatever user the administrator starts the node’s

mdce service u

nder. By default, the mdce service starts a s

root on UNIX

operating sys

tems, and as

LocalSystem on Microsoft W indows operating

systems. Be ca

use MATLAB provides s ystem calls, users can submit jobs

that execute

shell commands.

• The mdce serv

ice does not enforce any access control or authentication.

Anyone with

local or remote access to the mdce services can start and stop

their worke

rs and job managers, and query for their status.

• The job mana

ger does not restrict access to the cluster, nor to job and task

data. Usin

g a third-party scheduler instead of the M athWorks job manager

could allo

w you to take advantage of the security measures it provides.

• The parall

el computing p rocesses must all be onthesamesideofafirewall,

or you mus

ttakemeasurestoenablethemtocommunicatewitheachother

through t

he firewall. Workers running tasks of the same communicating

job canno

t be firewalled off from each other, be cause their MPI-based

communi

cation w ill not work.

• If certa

in ports are restricted, you can specify the p orts used for parallel

computi

ng. See “Define Script Defaults” on page 2-13.

• If your

organization is a membe r o f the Internet Multicast Backbone

(MBone

), make sure that your parallel computing cluster is isolated from

MBone a

ccess if you are using multicast for parallel computing. Isolation is

gener

ally the default condition. If you have any questions about MBone

membe

rship, contact your netw ork administrator.

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