Glossary¶
General Terms¶
- Cloud VPS
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A Virtual Private Server running on cloud infrastructure. It provides guaranteed computing resources — CPU, RAM, and disk space — in an isolated environment with full administrative access.
- Region
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The physical location of the Delta Cloud data center from which the service is provided. Each region is independent, and data is physically stored in the selected region. Example:
eu-sof-1(Sofia, Bulgaria). - Plan
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The resource configuration of a server, including a specific number of CPU cores, RAM, and disk space. The plan can be changed by resizing the server.
- Resize
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The process of changing the server's plan — scaling CPU and RAM up or down, and increasing disk space. After the proforma invoice is paid, the server is automatically restarted to apply the new configuration. Data is not affected. For details, see Resize.
- Reinstall
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The process of changing the operating system or image on the server. Reinstalling erases all data on the main volume and installs a clean copy of the selected OS or application. For details, see Reinstall.
- NVMe
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Non-Volatile Memory Express — a modern protocol for accessing high-speed SSD drives. NVMe drives deliver significantly faster read and write speeds compared to traditional SATA SSDs.
- SSH
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Secure Shell — a cryptographic network protocol for secure remote server management. SSH provides an encrypted connection between client and server and is the primary method for administering Linux servers.
- Rescue Mode
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A special environment that loads a temporary operating system, allowing diagnostics and repairs when the primary system cannot start normally.
Networks and Security¶
- Network Interface
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A virtual network adapter attached to a server. Each interface is connected to a specific network and receives an IP address from its range. A server can have multiple network interfaces.
- Private Network
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An isolated network within a project, accessible only to servers connected to it. Private networks enable secure communication between servers without internet exposure.
- CIDR
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Classless Inter-Domain Routing — a method for describing network ranges. It is written as an IP address followed by a forward slash and a number indicating the length of the network prefix (e.g.,
192.168.0.0/24). - Security Group
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A set of network traffic rules that determine which inbound and outbound traffic is allowed for a given network interface. Security groups act as a virtual firewall.
- Ingress
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Inbound network traffic — traffic coming into the server from external sources.
- Egress
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Outbound network traffic — traffic leaving the server toward external destinations.
- MAC Address
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Media Access Control address — a unique physical address assigned to each network interface. It is used to identify devices on the local network.
Volumes and Storage¶
- Volume
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A block storage device that can be attached to a server. Volumes can be attached and detached dynamically without restarting the server.
- Block Storage
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A storage service providing additional volumes that can be connected to Cloud VPS servers. Data is stored independently of the server and can be moved between different servers.
- Mount
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The process of attaching a volume to a server, making it available as a device in the operating system.
- Snapshot
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A point-in-time copy of an entire volume at the block level, capturing its complete state — operating system, software, configuration, and data. In the context of the Cloud VPS service, a snapshot covers the server's main volume. Additional volumes (Block Storage) have their own snapshot functionality, accessible from each volume's page. Snapshots are kept for 48 hours and are then automatically deleted. For details, see Snapshots.
Additional Information¶
For more information on how these terms are used in the context of the service, see the relevant sections in the documentation.
If you have questions or need further clarification, please contact our support team.