コンテンツにスキップ

2. Getting started, Login

2.1. Get an account

In order to use this system, it is necessary to register a user account.

Please refer Getting Accounts Page for details, as the procedure depends on your affiliation and program to apply.

Info

The process of starting to use and obtaining an account is the same as for TSUBMA3.0.

2.2. Login

You need to upload the SSH public key to access the login node.

Please refer to TSUBAME portal User's Guide "SSH public key registration" for the operation of public key registration.

Info

The login method is the same as for TSUBMA3.0.

2.3. Login nodes

To use this system, you must first log in to the login node; the terminal software used in TSUBAME 3.0 can be used without modification.

The login destination is connected to via SSH. File transfers also connect via SFTP.

login.t4.gsic.titech.ac.jp

Info

The domain has been changed from login.t3.gsic.titech.ac.jp to login.t4.gsic.titech.ac.jp.

If you want to login to any login node, specify the following host name (FQDN) 

login1.t4.gsic.titech.ac.jp
login2.t4.gsic.titech.ac.jp

Info

The login nodes of TSUBAME3.0 were login0 and login1, while those of TSUBAME4.0 are login1 and login2.

2.3.1. Restrictions for heavy work in login nodes

As login nodes (login, login0, login1) are shared with many users at the same time, please do not execute programs which dominate CPU time. For parallel or long-time computation, please use compute nodes using qsub and qrsh commands, Followings are examples of judgment criteria. When the system administrator noticed your program is preventing others, it will be terminated even if it is permitted or not prohibited here,

Permitted operations

  • File transfer, compression, decompression (e.g., scp, sftp, rsync, tar)
  • Program compilation (If you consume lots of resources by parallel compilation etc., use compute nodes)

Prohibited operations

  • Calculation using commercial applications, freeware, or programs made by yourself
  • Execution of programs that exceeds 10 minutes (except for file transfer)
  • Execution of parallel programs (including python and MPI)
  • Execution of programs that consumes lots of memory
  • Execution of lots of processes simultaneously (e.g., parallel compilation)
  • Execution of server programs or auto-restart programs (e.g., VSCode Server, Jupyter Notebook)
  • Other operations which use lots of CPU resources

The login nodes have 4 GB memory limit per process. The system administrator will terminate programs with excessive loads without prior notice. If you want to execute such operations, or you feel login nodes are too heavy, please use compute nodes as interactive jobs via job scheduler.

Info

Jupyter Lab and code-server(VS Code clone) can be invoked in compute nodes via Open OnDemand.

Info

The rules for using login nodes and computation nodes are the same as in TSUBAME 3.0.

2.4. How to check TSUBAME points

You can check TSUBAME points with t4-user-info group point command as below. 

$ t4-user-info  group point -g  TESTGROUP
gid     group_name                        deposit      balance
--------------------------------------------------------------
xxxx  TESTGROUP                             5000     800000000

Info

The TSUBAME point confirmation command has been changed from t3-user-info to t4-user-info.