Becoming a medusa user
Medusa accounts can be requested using the
Collaboration Virtual Organization Computer Resource Request
Users are encouraged to connect to the Medusa cluster
using Grid tools. These tools are included in the
LSC DataGrid Client
package. You should install
the package on your local workstation or laptop.
To use the tools in the LSC DataGrid Client package you will need
a DOEGrids Personal
Certificate for authentication. If you need to obtain a DOEGrids Personal Certificate,
please navigate to LSC
Data Grid web site
Getting a Digital Certificate
for instructions. Grid-enabled versions of SSH, FTP and other tools are available
to make life easier. Please see:
Quick Introduction to LSC DataGrid Client Tools
for full instructions on how to obtain
and install the software.
Medusa User Policies
Currently the Medusa cluster has 296 slave nodes and a number of
master nodes, but you MUST log into hydra and not one of the other
masters. We have a web page with documentation regarding accessing the
cluster. Documentation for users is minimal, but under development, so
suggestions are welcome:
Your home directory is visible from all machines, so you should be
able to pick up auxilliary files from there as you need to. If you
have problems with the system, please submit a problem report by
going to our web page and following the link at the top of the
navigation bar; use guest/guest as the user/passwd and change the
database toggle switch to medusa. We will deal with the issue as
time permits. Please attempt to understand the classifications of
bugs and use the appropriate urgency identification.
Also, a few rules about our system:
Welcome to the Medusa Cluster,
- Please do not write output to your home directory, this may cause
noticable performance issues. See #2.
- Please do not keep large amounts of data in your home directory.
We back up the home directories once a week and do not have the
resources to deal with problems at this time. If you want to store
data temporarily use the space in /scratch which is accessible from
- Please be aware that the computer you log into is used by several
people. Please don't run major code on it. Use it for compiling and
- If you have a very urgent problem, please e-mail
firstname.lastname@example.org about it.