Glossary¶

Bare Metal: A physical server (Dedicated Server) provided for single-tenant use, without a virtualization layer. Unlike Cloud VPS, Bare Metal servers provide direct access to the hardware — CPU, memory, disks, and network cards.
Region: 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: The configuration of the physical server, including a specific processor, amount of RAM, disks, and network interfaces. Unlike Cloud VPS, the plan of a Bare Metal server cannot be changed after service activation.
Reinstall: The process of changing the operating system on the server. Reinstalling erases all data on the disks and installs a clean copy of the selected OS. For details, see Reinstall.
Rescue Mode: A special environment that loads a temporary operating system, allowing diagnostics and repairs when the primary system cannot start normally.
SSH: 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.
RDP: Remote Desktop Protocol — a protocol developed by Microsoft for remote management of the graphical interface of Windows servers.

CPU: Central Processing Unit. On Bare Metal servers, the CPU is physical, without virtualization. It is characterized by the number of physical cores, number of threads, and base clock frequency.
Threads: Virtual computing units, implemented through technology such as Intel Hyper-Threading. A single physical processor with 4 cores and hyper-threading support has 8 threads.
Motherboard: The main printed circuit board of the server that connects all other components. The motherboard model determines supported processors, maximum memory capacity, and expansion slots.
SSD: Solid State Drive — an electronic storage device with no moving parts. SSDs are significantly faster than traditional HDDs but usually have smaller capacities.
NVMe: Non-Volatile Memory Express — a modern protocol for accessing high-speed SSD drives connected directly to the PCIe bus. NVMe drives deliver many times faster access compared to SATA SSDs.

RAID (Redundant Array of Independent Disks): A technology for combining multiple physical disks into a single logical volume to improve performance, reliability, or both. On Bare Metal servers, RAID is implemented in hardware — through a dedicated RAID controller.
RAID 0 (Stripe): Data is distributed (striped) across disks without duplication. Provides maximum speed and capacity, but if one disk fails, all data is lost. Requires a minimum of 2 disks.
RAID 1 (Mirror): Data is duplicated identically between two disks. If one disk fails, the system continues to function. Capacity equals one disk. Requires a minimum of 2 disks.
RAID 5: Data and parity checksums are distributed across all disks. Supports the failure of one disk without data loss. Capacity equals (N-1) disks. Requires a minimum of 3 disks.
RAID 6: Similar to RAID 5 but with double parity. Supports simultaneous failure of two disks without data loss. Capacity equals (N-2) disks. Requires a minimum of 4 disks.
RAID 10 (1+0): A combination of RAID 1 (mirror) and RAID 0 (stripe). Provides high speed and reliability, but with 50% capacity utilization. Requires a minimum of 4 disks.

Network Interface: A physical network card attached to the server. Each interface is identified in the operating system by a unique name (e.g., eth0, eth1) and has a unique MAC address.
MAC Address: Media Access Control address — a unique physical address assigned to each network interface. It is used to identify devices on the local network.
CIDR: 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).
Gateway: A network device that connects your server to the external network (e.g., the internet). Packets destined for networks outside the local one are sent through the gateway.
Bonding: A technology for combining multiple physical network cards into a single logical interface. Used to increase throughput or create redundancy.

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.