Cluster Overview

Overview

The cluster is composed 3 groups of machines :

• The User Interfaces (UI)

This is the cluster front-end, to use the cluster, you need to log into those machines

Servers : [ m0 , m1 , m2 , m3 ] , [ m5 , m6 , m7 , m8 , m9 ]

• The Computing Machines :
  • The Computing Element (CE): This server is the brain of the batch system : it manages all the submitted jobs, and send them to the worker nodes.

Servers : cream02

• The Worker Nodes (WN): This is the power of the cluster : they run multiple jobs in parallel and send the results & status back to the CE.

Servers : nodeXX-YY

• The Storage Machines
  • The Storage Element: it is the brain of the cluster storage. Grid accessible, it knows where all the files are, and manages all the storage nodes.

Server : maite

• The Storage Nodes: This is the memory of the cluster : they contain big data files. In total, they provide ~2300 TB of grid-accessible storage.

Servers : beharXXX

• The User Storage: it provides the home of the UIs. It is a highly efficient & redundant storage node of ~70 TB capacity.

How to Connect

To connect to the cluster, you need to have sent us your public ssh key. In a terminal, type the following:

ssh -X -o ServerAliveInterval=100 username@m0.iihe.ac.be

Tip: the -o ServerAliveInterval=100 option is used to keep your session alive for a long period of time ! You should not be disconnected during a whole day of work.

After a successful login, you'll see this message :

          @@@@@@@@     @@@@             @@@@@     @@@@@@@
             @@       @    @            @@   @    @@
             @@            @    @@@@    @@@@@     @@@@
             @@         @@              @@    @   @@@@
             @@       @                 @@    @   @@
             @@       @@@@@@            @@@@@@    @@@@@@@
                               @ IIHE   

   Welcome to the t2b cluster ! You are on the following UI: m2

   You can find more info on our wiki page: http://t2bwiki.iihe.ac.be
            To contact us: grid_admin@listserv.vub.ac.be

   Please remember this machine will allow you only 600s (10 minutes)
      of cpu time per processes.
 ___________________________________________________________________________
              Your Quota on /user+/localgrid: 43% used (282G left) 
  There are 2 users here   |   Load: 0.16 /8 CPUs (2%)  |   Mem: 3% used