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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

  • ACL: Access Control List

  • ACME: Automated Certificate Management Environment

  • AES: Advanced Encryption Standard

  • AI: Artificial Intelligence

  • API: Application programming interface

  • AVX: Advanced Vector eXtensions

  • AWS: Amazon Web Services

B

  • BLAS: Basic Linear Algebra Subprograms

  • BU: Billing Unit

C

  • CBC: Cipher Block Chaining

  • CD: Continuous Deployment

  • CI: Continuous Integration

  • CIDR: Classless Inter-Domain Routing

  • CLI: Command-Line Interface

  • CNAME: Canonical Name (DNS record type)

  • CORS: Cross-Origin Resource Sharing

  • CPU: Central Processing Unit

  • CSRF: Cross-Site Request Forgery

  • CTR: Counter

D

  • DBaaS: Database-as-a-Service

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

  • DHCP: Dynamic Host Configuration Protocol

  • DKIM: DomainKeys Identified Mail

  • DMARC: Domain-based Message Authentication, Reporting, and Conformance

  • DNS: Domain Name System

E

  • EC2: Elastic Compute Cloud (Amazon Web Services)

  • ECB: Electronic Codebook

  • ECDSA: Elliptic Curve Digital Signature Algorithm

  • EtM: Encrypt-then-MAC

F

  • FFT: Fast Fourier Transform

  • FLOPS: Floating Point Operations Per Second

  • FQDN: Fully Qualified Domain Name

  • FTP: File Transfer Protocol

  • FTPS: FTP Secure

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

  • HMAC: Hash-based Message Authentication Code

  • HPC: High-Performance Computing

  • HSTS: HTTP Strict Transport Security

  • 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

  • ICMP: Internet Control Message Protocol

  • IMAP: Internet Message Access Protocol

  • IP: Internet Protocol

J

  • JWT: JSON Web Token

K

  • KVM: Kernel-based Virtual Machine

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

  • NIC: Network Interface Card

  • NVMe: Non-Volatile Memory express

O

  • OCI: Open Container Initiative

  • OMP: Open Multi-Processing

  • OOD: Open OnDemand

  • OSS: Object Storage Server

  • OST: Object Storage Target

P

  • P2P: Peer-to-Peer

  • 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

  • QEMU: Quick EMUlator

  • QLM: Quantum Learning Machine

  • QPU: Quantum Processing Unit

R

  • RAID: Redundant Array of Inexpensive Disks

  • RBAC: Role-Based Access Control

  • REPL: Read–Eval–Print Loop

  • RSA: Rivest-Shamir-Adleman

S

  • S3: Simple Storage Service (Amazon Web Services)

  • SaaS: Software-as-a-Service

  • SBOM: Software Bill of Materials

  • SDN: Software-Defined Networking

  • SFTP: SSH File Transfer Protocol

  • SLURM: Simple Linux Utility for Resource Management

  • SMT: Simultaneous Multithreading

  • SMTP: Simple Mail Transfer Protocol

  • SPF: Sender Policy Framework

  • SPoF: Single point of Failure

  • SQL: Structured Query Language

  • SSH: Secure SHell

  • SSL: Secure Sockets Layer

T

  • TCP: Transmission Control Protocol

  • TLS: Transport Layer Security

  • TOTP: Time-based One-Time Password

U

  • UDP: User Datagram Protocol

  • UI: User Interface

  • UUID: Universally Unique Identifier

  • UX: User Experience

V

  • VM: Virtual Machine

  • VNC: Virtual Network Computing

  • VPN: Virtual Private Network

W

  • WCAG: Web Content Accessibility Guidelines