File transfer to/from Transit¶

There are multiple ways to transfer files to/from Transit:

What is Transit?

Transit is an UPPMAX service to send files around. It is not a file server.

See the page about Transit for more detailed information.

Method	Features
Using a graphical program	Graphical interface, intuitive, for small amounts of data only
Using rsync	Terminal, easy to learn, secure
Using SFTP	Terminal, easy to learn, secure
Using SCP	only download, terminal, easy to learn, can be used in scripts

Each of these methods is discussed below.

Using a graphical program¶

One can transfer files to/from Transit using a graphical program. A graphical interface is intuitive to most users. However, it can be used for small amounts of data only and whatever you do cannot be automated.

See Transit file transfer using a graphical program for a step-by-step guide how to transfer files using a graphical tool.

Using `rsync`¶

Transit is used as a stepping-stone to transfer files to Bianca using rsync.

Using SCP¶

One cannot upload files to Transit using SCP in a terminal: Transit only allows for sending files from A to B, not for storing them.

One can download the files on Transit. However, Transit is not a file server. Instead, the files that appear to be on Transit are the files in your Rackham home folder. Due to this, it makes more sense to use SCP to transfer files to/from Rackham.

For completeness sake, see Transit file transfer using SCP for a step-by-step guide how to transfer files using SCP. It show one cannot upload files to Transit.

Using SFTP¶

One can transfer files to/from Transit using SFTP in a terminal. One connects a local and a remote folder, after which one can upload and download files. SFTP is considered a secure file transfer protocol.

See Transit file transfer using SFTP for a step-by-step guide how to transfer files using SFTP.

Overview¶

flowchart TD

    %% Give a white background to all nodes, instead of a transparent one
    classDef node fill:#fff,color:#000,stroke:#000

    %% Graph nodes for files and calculations
    classDef file_node fill:#fff,color:#000,stroke:#000
    classDef calculation_node fill:#ccf,color:#000,stroke:#00f
    classDef transit_node fill:#fff,color:#000,stroke:#fff

    subgraph sub_inside[SUNET]
      user_local_files(Local user files):::file_node

      subgraph sub_transit_env[Transit]
        files_on_transit(Files posted to Transit):::transit_node
      end
      subgraph sub_rackham_shared_env[Rackham]
        files_in_rackham_home(Files in Rackham home folder):::file_node
      end
      subgraph sub_bianca_private_env[Bianca]
        files_in_bianca_project(Files in Bianca project folder):::file_node
      end
      subgraph sub_other_clusters[Other clusters]
        files_on_other_clusters(Files on other clusters):::file_node
      end
    end

    %% Shared subgraph color scheme
    %% style sub_outside fill:#ccc,color:#000,stroke:#ccc
    style sub_inside fill:#ccc,color:#000,stroke:#000
    style sub_transit_env fill:#cfc,color:#000,stroke:#000
    style sub_rackham_shared_env fill:#fcc,color:#000,stroke:#000
    style sub_bianca_private_env fill:#ccf,color:#000,stroke:#000
    style sub_other_clusters fill:#ffc,color:#000,stroke:#000

    user_local_files <--> |graphical tool|files_on_transit
    user_local_files <--> |SFTP|files_on_transit

    files_on_transit <--> |SCP|files_in_rackham_home
    files_on_transit <--> |SFTP|files_in_rackham_home

    files_on_transit <--> |SCP|files_in_bianca_project
    files_on_transit <--> |SFTP|files_in_bianca_project

    files_on_transit <--> |transfer|files_on_other_clusters