User`s guide

Chapter 2. Using the Cray T3E at CSC 13

Chapter 2

Using the Cray T3E at CSC

This chapter helps you to start using the Cray T3E at CSC: how to log in,

where to store ﬁles, how to to use the compiler and run your codes etc.

The usage policy of the machine is discussed in Section 1.2 on page 8.

2.1 Logging in

When logging into the Cray T3E, you will actually get connected to one

of the command processors. These are the processing elements (PEs)

that are responsible for Unix command processing.

In order to log in, you normally have to ﬁrst log into a local Unix com-

puter (at your university or some other site on the Internet) and then

use a ssh, telnet or rlogin command, giving t3e.csc.fi as argument.

For example, logging in from cypress.csc.fi:

cypress% ssh t3e.csc.fi

The same can be done using telnet:

cypress% telnet t3e.csc.fi

Or rlogin:

cypress% rlogin t3e.csc.fi

If you use the ssh or rlogin command and your user id on the Cray T3E

is diﬀerent from your user id on your local computer, you must give the

-l option to specify the user id on the Cray T3E. This option is added

after the computer name, for example:

cypress% ssh t3e.csc.fi -l user_id

ssh is the preferred way to connect to T3E as well as to all CSC machines