Log in to Bianca¶
- First step in understanding why Bianca login is the way it is
- If outside of SUNET: Start VPN
- Log in to the Bianca remote desktop (uses ThinLinc)
- Log in to the Bianca terminal (using
- First step in understanding what a login node is
See section 'Video' for the videos that show how to do these exercises
- Discuss: what is the purpose of Bianca? What kind of consequences will this have for its design?
- If outside of SUNET: use a VPN
- Log in to the Bianca remote desktop
- Log in to the Bianca terminal using
- Start an interactive session
The voyage from outside the university network to a cluster login node
1. Bianca's design¶
Bianca, like all clusters at UPPMAX, is named after a Tintin character, in this case after Bianca Castafiore and originally had 3200 CPU cores.
Bianca was designed to, among other:
- Protect the sensitive data: (1a) Accidental data leaks should be difficult (1b) Law: if data is leaked, the person doing so should be possibly identified
- Emulate a standard HPC cluster environment: (2a) Use the hardware as efficient as possible, by using a queuing system. See UPPMAX usage for the current usage of Bianca (2b) Distributes shared resources (CPU, memory) in a fair way, by using a queuing system (2c)make correct data management as easy as possible
The relation between Bianca and the Internet
Bianca and the Internet have this relation:
- Bianca has no internet , to prevent accidental data leaks.
- Bianca is only accessible from within SUNET (i.e. from university networks), to protect the sensitive data better.
Data can be transferred to/from the
which is a special folder that is visible from the Internet.
If you are outside of SUNET, you need to use a VPN, as is described in the next section.
If you are inside of SUNET, you can skip the next section.
2. Use a VPN¶
If you are outside of SUNET, you need to use a VPN.
To be able to use VPN:
- For Uppsala University: go to this page
- For other Swedish universities, search their websites to get a VPN setup
3. Logging in¶
Inside of SUNET or with a VPN, login depends on what you need:
|What you need||What to do|
|A remote desktop||Login at https://bianca.uppmax.uu.se|
4. Log in to the Bianca remote desktop environment¶
You need to be within SUNET or use a VPN
Bianca offers a remote desktop environment (which uses ThinLinc to establish the connection). Here is how to login:
In your web browser, go to https://bianca.uppmax.uu.se
Fill in the first dialog. Do use the
UPPMAX2-factor authentication (i.e. not SUPR!)
- Fill in the second dialog, using your regular password (i.e. no need for two-factor authentication)
The second Bianca remote desktop login dialog. Note that it uses ThinLinc to establish this connection
- Enjoy! You are in!
The Bianca remote desktop
5. Log in to the Bianca command-line environment¶
You need to be within SUNET or use a VPN
You can use your favorite terminal to login (see https://uppmax.github.io/uppmax_intro/login2.html#terminals for an overview of many) to the Bianca command-line environment.
- From a terminal, use
sshto log in:
Type your UPPMAX password, directly followed by the UPPMAX 2-factor authentication number, for example
verysecret678123, then press enter
Type your UPPMAX password, for example
Enjoy! You are in!
6. Login node¶
When you are logged in, you are on a login node. There are two types of nodes:
|Login node||Start jobs for worker nodes, do easy things|
|Worker node||Do hard calculations, either from scripts of an interactive session|
Bianca contains hundreds of nodes, each of which is isolated from each other and the Internet.
As Bianca is a shared resources, there are rules to use it together in fair way:
- The login node is only for easy things, such as moving files, starting jobs or starting an interactive session
- The worker nodes are for harder things, such as running a script or running an interactive session.
To start an interactive session , type:
- Bianca makes it hard to leak data
- Login differs from where you are and what you need
- Only do light things on login nodes
-  'no internet' meaning 'no direct way to download or upload data from/to the internet
-  In this case, 8 hour long, with 2 cores