EUDAT & iRODS

The EUDAT Collaborative Data Infrastructure (or EUDAT CDI) is one of the largest infrastructures of integrated data services and resources supporting research in Europe. It is sustained by a network of more than 20 European research organizations, data and computing centers. For more information, see the official EUDAT CDI page.

Before you start:

Place a request at EUDAT CDI via their support form (consult their documentation if needed).
Follow IT4I iRODS documentation below.
If you have additional questions or requests, contact support@it4i.cz.

iRODS

The integrated Rule-Oriented Data System (iRODS) is an open source data management software used by research organizations and government agencies worldwide. iRODS is released as a production-level distribution aimed at deployment in mission critical environments. It virtualizes data storage resources, so users can take control of their data, regardless of where and on what device the data is stored. For more detailed information about iRODS itself, see the official iRODS page or read official documentation.

How to Put Your Data to Our Server

If you have a user account with active project assigned, contact support@it4i.cz, to have your iRODS user password set up. You can manage the data from the Internet or directly from Karolina (as of Q1 2026) access nodes for best performance on already uploaded data.

Access to iRODS Collection From Karolina

Access to iRODS Collection requires access to the Karolina cluster (i.e. IT4I account), since iRODS clients are provided as a module on Karolina. The irodsfs module loads config file for irodsfs and icommands, too.

Mounting Your Collection

[userid@login4.karolina ~] $ ml irodsfs

irodsfs configuration file has been created at /home/some_user/.irods/config.yml
iRODS environment file has been created at /home/some_user/.irods/irods_environment.json

to start irodsfs, run:          irodsfs -config ~/.irods/config.yml ~/IRODS
to start iCommands, run:        iinit

For more information, see https://docs.it4i.cz/en/docs/general/irods

Now you can choose between the Fuse client or iCommands:

Fuse

This method will present collection as a mountpoint accessible only by your user on selected access node. You can work with it as a regular directory using common UNIX commands ls, cd, cp, mv, etc.

[userid@login4.karolina ~]$ irodsfs -config ~/.irods/config.yml ~/IRODS
time="2022-08-04 08:54:13.222836" level=info msg="Logging to /tmp/irodsfs_cblmq5ab1lsaj31vrv20.log" function=processArguments package=main
Password:
time="2022-08-04 08:54:18.698811" level=info msg="Found FUSE Device. Starting iRODS FUSE Lite." function=parentMain package=main
time="2022-08-04 08:54:18.699080" level=info msg="Running the process in the background mode" function=parentRun package=main
time="2022-08-04 08:54:18.699544" level=info msg="Process id = 27145" function=parentRun package=main
time="2022-08-04 08:54:18.699572" level=info msg="Sending configuration data" function=parentRun package=main
time="2022-08-04 08:54:18.699730" level=info msg="Successfully sent configuration data to background process" function=parentRun package=main
time="2022-08-04 08:54:18.922490" level=info msg="Successfully started background process" function=parentRun package=main

After you are finished, unmount the collection from the access node.

$ fusermount -u ~/IRODS

iCommands

ssh some_user@karolina.it4i.cz
[userid@login4.karolina ~]$ ml irodsfs
irodsfs configuration file has been created at /home/userid/.irods/config.yml.
      to start irods fs run: irodsfs -config ~/.irods/config.yml ~/IRODS

iCommands environment file has been created at /home/$USER/.irods/irods_environment.json.
      to start iCommands run: iinit

[userid@login4.karolina ~]$ iinit
Enter your current PAM password:

[some_use@login4.karolina ~]$ ils
/IT4I/home/some_user:
  test.1
  test.2
  test.3
  test.4

Use the command iput for upload, iget for download, or ihelp for help.

Access from outside

This guide assumes you are uploading your data from your local PC/VM.

You Need a Client to Connect to iRODS Server

There are many iRODS clients, but we recommend the following:

Cyberduck - Windows/Mac, GUI
Fuse (irodsfs lite) - Linux, CLI
iCommands - Linux, CLI.

Cyberduck

Download Cyberduck.
Download connection profile for IT4I iRods server.
Left double-click this file to open connection.

Fuse

This is a Linux client only, basic knowledge of the command line is necessary.

Fuse allows you to work with your iRODS collection like an ordinary directory.

cd ~
wget https://github.com/cyverse/irodsfs/releases/download/v0.7.6/irodsfs_amd64_linux_v0.7.6.tar
tar -xvf ~/irodsfs_amd64_linux_v0.7.6.tar
mkdir ~/IRODS ~/.irods/ && cd "$_" && wget https://docs.it4i.cz/config.yml
wget https://pki.cesnet.cz/_media/certs/chain_geant_ov_rsa_ca_4_full.pem -P ~/.irods/

Mounting Your Collection

[some_user@local_pc ~]$ ./irodsfs -config ~/.irods/config.yml ~/IRODS
time="2022-07-29 09:51:11.720831" level=info msg="Logging to /tmp/irodsfs_cbhp2rucso0ef0s7dtl0.log" function=processArguments package=main
Password:

time="2022-07-29 09:51:17.691988" level=info msg="Found FUSE Device. Starting iRODS FUSE Lite." function=parentMain package=main
time="2022-07-29 09:51:17.692683" level=info msg="Running the process in the background mode" function=parentRun package=main
time="2022-07-29 09:51:17.693381" level=info msg="Process id = 74772" function=parentRun package=main
time="2022-07-29 09:51:17.693421" level=info msg="Sending configuration data" function=parentRun package=main
time="2022-07-29 09:51:17.693772" level=info msg="Successfully sent configuration data to background process" function=parentRun package=main
time="2022-07-29 09:51:18.008166" level=info msg="Successfully started background process" function=parentRun package=main

Putting Your Data to iRODS

[some_use@local_pc ~]$ cp test1G.txt ~/IRODS

It works as ordinary file system

[some_user@local_pc ~]$ ls -la ~/IRODS
total 0
-rwx------ 1 some_user some_user 1073741824 Nov  4  2021 test1G.txt

Unmounting Your Collection

To stop/unmount your collection, use:

[some_user@local_pc ~]$ fusermount -u ~/IRODS

iCommands

This is a Linux client only, basic knowledge of the command line is necessary.

For installation instructions, see the official page.

EUDAT & iRODS

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