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Warning!

Puhti and Mahti are being decommissioned in stages, and their storage areas will become fully unavailable from 15 October 2026. Clean up unnecessary files and move any data you need to keep by 31 August 2026. See the Roihu data migration guide for instructions on transferring your data to Roihu.

Puhti computing services have been decommissioned and no new jobs are accepted or executed on its compute nodes. Puhti login nodes and storage services are planned to remain available until 15 October 2026.

Glossary

A

  • AES: Advanced Encryption Standard

  • AI: Artificial Intelligence

  • API: Application programming interface

  • AVX: Advanced Vector eXtensions

B

  • BLAS: Basic Linear Algebra Subprograms

  • BU: Billing Unit

C

  • CBC: Cipher Block Chaining

  • CD: Continuous Deployment

  • CI: Continuous Integration

  • CLI: Command-Line Interface

  • CPU: Central Processing Unit

  • CTR: Counter

D

  • DBaaS: Database-as-a-Service

  • DFT: 1. Discrete Fourier Transform, 2. Density Functional Theory

E

  • ECB: Electronic Codebook

  • EtM: Encrypt-then-MAC

F

  • FFT: Fast Fourier Transform

  • FLOPS: Floating Point Operations Per Second

  • FTP: File Transfer Protocol

G

  • GC: Grand Challenge (project)

  • GCC: GNU Compiler Collection

  • GCD: Graphics Compute Die

  • GID: Group IDentifier

  • GNU: GNU's Not Unix

  • GPU: Graphics Processing Unit

  • GUI: Graphical User Interface

H

  • HPC: High-Performance Computing

  • HTC: High-Throughput Computing

  • HTTP: Hypertext Transfer Protocol

  • HTTPS: Hypertext Transfer Protocol Secure

I

  • I/O: Input/Output

  • IaaS: Infrastructure-as-a-Service

  • IaC: Infrastructure-as-Code

  • IP: Internet Protocol

L

  • LUMI: Large Unified Modern Infrastructure

M

  • MAC: Message Authentication Code

  • MDS: Metadata Server

  • MDT: Metadata Target

  • MFA: Multi-Factor Authentication

  • ML: Machine Learning

  • MOOC: Massive Open Online Course

  • MPI: Message-Passing Interface

N

  • NFS: Network File System

  • NVMe: Non-Volatile Memory express

O

  • OMP: Open Multi-Processing

  • OOD: Open OnDemand

  • OSS: Object Storage Server

  • OST: Object Storage Target

P

  • PaaS: Platform-as-a-Service

  • PBKDF1: Password-Based Key Derivation Function 1

  • PBKDF2: Password-Based Key Derivation Function 2

  • PCI: Peripheral Component Interconnect

  • PCIe: Peripheral Component Interconnect express

  • PI: Principal Investigator

  • PM: Project Manager

  • PME: Particle-Mesh Ewald

  • PRACE: Partnership for Advanced Computing in Europe

Q

  • QLM: Quantum Learning Machine

  • QPU: Quantum Processing Unit

R

  • REPL: Read–Eval–Print Loop

  • RSA: Rivest-Shamir-Adleman

S

  • SaaS: Software-as-a-Service

  • SLURM: Simple Linux Utility for Resource Management

  • SMT: Simultaneous Multithreading

  • SPoF: Single point of Failure

  • SQL: Structured Query Language

  • SSH: Secure SHell

  • SSL: Secure Sockets Layer

T

  • TLS: Transport Layer Security

  • TOTP: Time-based One-Time Password

U

  • UI: User Interface

  • UUID: Universally Unique Identifier

  • UX: User Experience

V

  • VM: Virtual Machine