Glossary: Difference between revisions

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; Volume (Block Storage)


: Persistent storage in bwCloud-OS that exists independently of a VM. Volumes can be attached to instances, resized, exported as images, or backed up via snapshots.
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'''External Storage (S3 / NFS)''': Object storage or network drive for personal data, backups, or hard-to-reproduce results. Recommended for anything that is not temporary.
-->'''bwIDM''': Federated identity management system of the higher education institutions in Baden-Württemberg, Germany (https://www.bwidm.de).


; Image
'''bwSupportPortal:''' Federated support portal in Baden-Württemberg for services such as bwCloud-OS, bwHPC, and bwSFS (https://bw-support.scc.kit.edu).


: Operating system image from which new instances are launched. bwCloud-OS provides various preconfigured images (e.g., Debian 12, Ubuntu 24.04); custom images can also be uploaded.
'''Flavor''': Predefined resource profile for instances (number of vCPUs, RAM, and local system disk). Examples: ''m1.small'', ''m1.large''.


; Instance / VM
'''Floating IP''': Publicly accessible IP address that can be assigned to an instance as needed. This keeps the internal network topology unchanged.


: Virtual machine running in a region. It receives CPU, RAM, network, and storage resources and behaves like a physical server.
'''Home Region''': The region automatically assigned to a user during registration.


; Region
'''IaaS (Infrastructure as a Service)''': A cloud computing service model in which computing resources are provided by a cloud service provider. The provider supplies the storage, networking, servers, and virtualization.


: One of the four operational sites (Freiburg, Karlsruhe, Mannheim, Ulm). Each region is an independent OpenStack cluster with its own IP address logic.
'''Image''': Operating system image from which new instances are launched. bwCloud-OS provides various preconfigured images (e.g., ''Debian 12'', ''Ubuntu 24.04''); custom images can also be uploaded.


; Home Region
'''Instance / VM''': Virtual machine running in a region. It receives CPU, RAM, network, and storage resources, and behaves like a physical server.


: The region automatically assigned to a user during registration.
'''Project / Group Project''': Administrative container for resources, users, and quotas. In a group project, multiple people share all instances, images, security groups, etc. equally.


; Flavor
'''Quota''': Resource limits (vCPUs, RAM, volumes, etc.) per project. Increases can be requested via a support ticket.


: Predefined resource profile for instances (number of vCPUs, RAM, local system disk). Examples: <code>m1.small</code>, <code>m1.large</code>.
'''Region''': One of the four operational sites (Freiburg, Karlsruhe, Mannheim, Ulm). Each region is an independent OpenStack cluster with its own IP address logic.


; Quota
'''Security Group''': Set of firewall rules (inbound/outbound) assigned to an instance. By default, only SSH (port 22) is open. Additional ports must be explicitly allowed.


: Resource limit (vCPUs, RAM, volumes, etc.) per project. Increases can be requested via a support ticket.
'''Snapshot''': Point-in-time copy of an instance or volume. Snapshots appear as images and can be downloaded or used to create new volumes or instances.


; Snapshot
'''Volume (Block Storage)''': Persistent storage in bwCloud-OS that exists independently of a VM. Volumes can be attached to instances, resized, exported as images, and backed up via snapshots.
 
: Point-in-time copy of an instance or volume. Snapshots appear as images and can be downloaded or converted into new volumes/instances.
 
; Floating IP
 
: Publicly accessible IPv4 address that can be assigned to an instance as needed. This keeps the internal network topology unchanged.
 
; Security Group
 
: Set of firewall rules (inbound/outbound) assigned to an instance. By default, only SSH (port 22) is open; additional ports must be explicitly allowed.
 
; External Storage (S3 / NFS)
 
: Object storage or network drive for personal data, backups, or hard-to-reproduce results. Recommended for anything that is not temporary.
 
; Project / Group Project
 
: Administrative container for resources, users, and quotas. In a group project, multiple people share all instances, images, security groups, etc., equally.

Latest revision as of 17:53, 6 November 2025

bwIDM: Federated identity management system of the higher education institutions in Baden-Württemberg, Germany (https://www.bwidm.de).

bwSupportPortal: Federated support portal in Baden-Württemberg for services such as bwCloud-OS, bwHPC, and bwSFS (https://bw-support.scc.kit.edu).

Flavor: Predefined resource profile for instances (number of vCPUs, RAM, and local system disk). Examples: m1.small, m1.large.

Floating IP: Publicly accessible IP address that can be assigned to an instance as needed. This keeps the internal network topology unchanged.

Home Region: The region automatically assigned to a user during registration.

IaaS (Infrastructure as a Service): A cloud computing service model in which computing resources are provided by a cloud service provider. The provider supplies the storage, networking, servers, and virtualization.

Image: Operating system image from which new instances are launched. bwCloud-OS provides various preconfigured images (e.g., Debian 12, Ubuntu 24.04); custom images can also be uploaded.

Instance / VM: Virtual machine running in a region. It receives CPU, RAM, network, and storage resources, and behaves like a physical server.

Project / Group Project: Administrative container for resources, users, and quotas. In a group project, multiple people share all instances, images, security groups, etc. equally.

Quota: Resource limits (vCPUs, RAM, volumes, etc.) per project. Increases can be requested via a support ticket.

Region: One of the four operational sites (Freiburg, Karlsruhe, Mannheim, Ulm). Each region is an independent OpenStack cluster with its own IP address logic.

Security Group: Set of firewall rules (inbound/outbound) assigned to an instance. By default, only SSH (port 22) is open. Additional ports must be explicitly allowed.

Snapshot: Point-in-time copy of an instance or volume. Snapshots appear as images and can be downloaded or used to create new volumes or instances.

Volume (Block Storage): Persistent storage in bwCloud-OS that exists independently of a VM. Volumes can be attached to instances, resized, exported as images, and backed up via snapshots.