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Warning!

Puhti and Mahti will be decommissioned after Roihu becomes available. Users should clean up unnecessary files and move any required data by the end of August 2026. See the Roihu data preparation instructions for details.

Puhti scratch is very full: keep only active data there and move or delete everything else. No new Puhti scratch quota will be granted.

Mailing list

compute-server-announcements: most recent messages

June 23, 2026

CSC weekly user support session this Wednesday (24.06.2026) at 14:00 + short talk on "Getting started with CSC services -summer worker edition!" - servicedesk@csc.fi

June 15, 2026

CSC weekly user support session this Wednesday (17.6.) at 14:00 - servicedesk@csc.fi

June 09, 2026

CSC weekly user support session this Wednesday (10.6.) at 14:00 + special breakout room for Roihu data migration questions - servicedesk@csc.fi

June 01, 2026

CSC weekly user support session this Wednesday (3.6.) at 14:00 + short talk on "Getting ready for Roihu, with Allas and LUMI-O" - servicedesk@csc.fi

May 26, 2026

CSC weekly user support session this Wednesday 27.5. at 14:00 + short talk on "Application performance in Roihu" - servicedesk@csc.fi

May 19, 2026

CSC weekly user support session this Wednesday (20.5.) at 14:00 + short talk on "Overview of FirecREST API for Roihu" - servicedesk@csc.fi

May 12, 2026

CSC weekly user support session this Wednesday (13.5.) at 14:00 - servicedesk@csc.fi

May 05, 2026

CSC weekly user support session this Wednesday (6th of May) at 14:00 + short talk on "Time for data migration to Roihu + ProjData" - servicedesk@csc.fi

April 29, 2026

CSC weekly user support session this Wednesday (29.April) at 14:00 + short talk on "Roihu's hardware overview" - servicedesk@csc.fi

April 20, 2026

CSC weekly user support session this Wednesday 22nd Apr at 14:00 + short talk on "SSH authentication changes to Roihu" - servicedesk@csc.fi

April 14, 2026

CSC weekly user support session this Wednesday 15th of April at 14:00 - servicedesk@csc.fi

April 09, 2026

CSC Training: Portable GPU Programming, 11.-14.8.2026, at University of Jyväskylä - servicedesk@csc.fi

April 07, 2026

CSC weekly user support session this Wednesday 8th April at 14:00 - servicedesk@csc.fi

March 31, 2026

CSC weekly user support session this Wednesday (01.04.2026) at 14:00 + short talk on "Allas Web interface and some new features" - servicedesk@csc.fi

March 25, 2026

CSC Summer School in High-Performance Computing 2026 - Early Bird Registration Deadline Extended - servicedesk@csc.fi

March 23, 2026

CSC weekly user support session this Wednesday (25 Mar) at 14:00 - servicedesk@csc.fi

March 18, 2026

Training: Introduction to GPU Programming course 11-13.5.2026 at University of Helsinki - servicedesk@csc.fi

March 16, 2026

CSC weekly user support session this Wednesday (18.3.) at 14:00 - servicedesk@csc.fi

March 10, 2026

CSC weekly user support session this Wednesday (11.3.) at 14:00 - servicedesk@csc.fi

March 04, 2026

CSC Summer School in High-Performance Computing - Early Bird Registration Deadline March 13, 2026 - servicedesk@csc.fi

March 03, 2026

CSC weekly user support session this Wednesday 4th March at 14:00 - servicedesk@csc.fi

February 25, 2026

HPC developer position at CSC - servicedesk@csc.fi

February 24, 2026

CSC weekly user support session this Wednesday 25.2. at 14:00 + short talk on "SSH authentication changes to Roihu" - servicedesk@csc.fi

February 16, 2026

CSC weekly user support session this Wednesday 18th Feb at 14:00 - servicedesk@csc.fi

February 10, 2026

CSC weekly user support session this Wednesday (11.2.) at 14:00 + short talk on "Understanding parallel scalability" - servicedesk@csc.fi

February 09, 2026

Finnish LUMI Extreme Scale Access call extended until 26th February - servicedesk@csc.fi

February 02, 2026

CSC weekly user support session this Wednesday (4.2.) at 14:00 + short talk about on "Puhti and Mahti retirement and Roihu installation schedule" - servicedesk@csc.fi

January 26, 2026

CSC weekly user support session this Wednesday 28.1. at 14:00 + short talk on "Processes, threads and cores: how to ensure efficient usage of CSC supercomputers" - servicedesk@csc.fi

January 26, 2026

Finnish LUMI 2026 Extreme Scale Access call is open! - servicedesk@csc.fi

January 20, 2026

CSC weekly user support session this Wednesday (21.1.2026) at 14:00​​​​​ - servicedesk@csc.fi

January 15, 2026

Registration open: CSC Summer School in High-Performance Computing, 23.6. - 2.7.2026 - servicedesk@csc.fi

January 13, 2026

CSC weekly user support session this Wednesday (14.01.2026) at 14:00 - servicedesk@csc.fi

January 12, 2026

Reminder: Code Kickstart Hackathon Feb 2026 at CSC - servicedesk@csc.fi

December 18, 2025

Code Kickstart Hackathon Feb 2026 at CSC - servicedesk@csc.fi

December 15, 2025

CSC weekly user support session this Wednesday (17.12.) at 14:00 - note: last session for the year! - servicedesk@csc.fi

December 09, 2025

CSC weekly user support session this Wednesday 10th of December at 14:00 - servicedesk@csc.fi

December 05, 2025

CSC Spring School on Computational Chemistry 8-10.4.2026 - servicedesk@csc.fi

December 02, 2025

CSC weekly user support session this Wednesday 3rd December at 14:00 - servicedesk@csc.fi

November 24, 2025

CSC weekly user support session this Wednesday (26.11.) at 14:00 - servicedesk@csc.fi

November 18, 2025

CSC weekly user support session this Wednesday 19th Nov at 14:00 + short talk on "Processes, threads and cores: how to ensure efficient mapping in CSC supercomputers" - servicedesk@csc.fi

November 13, 2025

Reminder: Roihu pilot call – apply by 28 November - servicedesk@csc.fi

November 11, 2025

CSC weekly user support session this Wednesday (12th Nov) at 14:00 - servicedesk@csc.fi

November 03, 2025

CSC weekly user support session this Wednesday 5th Nov at 14:00 + short talk on "Roihu supercomputer - current status and updates" - servicedesk@csc.fi

October 30, 2025

CSC Computing Environment Part 2: Next steps 12.-13.11. (Free online course) - servicedesk@csc.fi

October 28, 2025

CSC weekly user support session tomorrow (Wed 29.10.) at 14:00 + short talk on "Using MATLAB on CSC supercomputers" - servicedesk@csc.fi

October 22, 2025

CSC weekly user support session TODAY (Wed 22.10.) at 14:00 + short talk on "Climate Digital Twin and how to access the data produced" - servicedesk@csc.fi

October 20, 2025

CSC Schrödinger Suite Workshop 26-27.11 - servicedesk@csc.fi

October 14, 2025

CSC weekly user support session tomorrow (Wed 15.10.2025) at 14:00 - servicedesk@csc.fi

October 07, 2025

CSC weekly user support session tomorrow (Wed 8.10.) at 14:00 + short talk on "Quantum computing services at CSC" - servicedesk@csc.fi

October 07, 2025

Roihu pilot call open – apply now for early access - servicedesk@csc.fi

September 30, 2025

CSC weekly user support session tomorrow (Wed 1.10.) at 14:00 + short talk on "Transferring arbitrarily large files with Funet Filesender" - servicedesk@csc.fi

September 23, 2025

CSC weekly user support session tomorrow (Wed 24.09.2025) at 14:00 + short talk on "Available software on Puhti/Mahti and their effective usage" - servicedesk@csc.fi

September 16, 2025

CSC weekly user support session today (Wed 17th) at 14:00 - servicedesk@csc.fi

September 10, 2025

CSC weekly user support session today (Wed 10th September) at 14:00 + short talk on "Topical issues on data management trainings and CSC service catalog" - servicedesk@csc.fi

September 08, 2025

CSC Computing Environment free online courses 1.-2.10. (Part 1: Basics) and 12.-13.11. (Part 2: Next steps) -Registration now open! - servicedesk@csc.fi

September 02, 2025

CSC weekly user support session tomorrow (Wed 3.9.) at 14:00 + short talk on "Upcoming billing unit changes" - servicedesk@csc.fi

August 26, 2025

CSC weekly user support session tomorrow (Wed 27.8.) at 14:00, short talk on Roihu - CSC's next supercomputer coming 2026 - servicedesk@csc.fi

August 19, 2025

CSC weekly user support session tomorrow (Wed 20.8.) at 14:00 - servicedesk@csc.fi

August 19, 2025

Registration open: Digital Twins for Earth Systems modelling seminar 11.11.2025 - servicedesk@csc.fi

August 12, 2025

CSC weekly user support session BACK FROM SUMMER BREAK, first session tomorrow (Wed 13.8.) at 14:00 - servicedesk@csc.fi

July 02, 2025

2nd Academic Call for LUMI-VTT Q50 hybrid HPC+QC access - servicedesk@csc.fi

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