Navigation and service

JUDAC - Juelich Data Access Server

The Juelich Data Access servers serve as a gateway to the facility-wide file systems for access to the user data of the supercomputing facility at the Jülich Supercomputing Centre (JSC). For security and administrative reasons the client and server parts are distributed to different servers.

All supercomputer users automatically have access to the Juelich JUDAC system, which provides GRID tools for data access and data transfer. Job submission is not allowed and computing time is not available on the system.

Data Transfer

In order to support large scale data transfers, a UFTP server as well as a GridFTP server are running on JUDAC. Naturally, ordinary SCP or RSYNC commands can still be used to transfer data, but may not show the same optimized behaviour as UFTP or GridFTP.


July 2020JUDAC upgraded to CentOS 8.
Nov 2018Moved to new hardware as part of the 5th generation of JUST.
Nov 2015Migration of JUDAC to new hardware running CentOS 7 Linux; thereby splitting client and server part services onto different servers.
Jan 2015UFTP service running
Dec 2014Start production
Sep-Nov 2014Setup server with Scientific Linux, Remote GPFS and GRID tools. Strong testing and deep analysis of intermittent data access problem by physical and logical reconfigurations together with networking group and IBM.