GSLB
(Global Server Load Balancing)

DNS-based Load Balancing to Distribute Traffic for Reliable Network

GSLB (Global Server Load Balancing) service automatically distributes network traffic to neighboring regions globally based on DNS in the case of a traffic spike in a certain region. For failure on a certain server, the network traffic load is balanced to normal resources to provide reliable service continuation.

Overview

  • Reliable Service

    Health check is conducted to see if the connected resources are running normally. In case of failure on a server, the resource is immediately processed as failover and removed from domain responses to detour traffic to other resources and provide reliable service.

  • Service Port Setting

    Create GSLB easily using web-based console and set/manage service ports. Multiple port setting is available for L4 load balancing (80, 443, 8080-8090, etc.)
    and multiple load balancing rules may be applied simultaneously.

  • Convenient Hosting Environments

    Public GSLB with external access via the Internet allows easy addition of resources for the applicable type.

  • Efficient Cost Management

    Efficient cost management is provided by the specific billing system to determine the pricing based on the numbers of domains, additional health check resources, and queries.

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Service Architecture

  • Internet → DNS Request → DNS, DNS → DNS Response → Internet , DNS → Domain Registration/Delegation → GSLB → Primary (Active) → (A data center, B data center) Health Check → Firewall → Security Group : Subnet - VM, VM ... / Security Group : Subnet - VM, VM ... → A Data center
  • Internet → DNS Request → DNS , DNS → DNS Response → Internet , DNS → Domain Registration/Delegation → GSLB → Secondary (Inactive) → (A data center, B data center) Health Check → Firewall → Security Group : Subnet - VM, VM ... / Security Group : Subnet - VM, VM ... → B Data center

Key Features

  • GSLB creation/management

    - Register resource and port data
    - Multiple resources may be registered in one GSLB

  • Distribution algorithm selection

    - Ratio : Distribute traffic in proportion to weight by resources
    - Round Robin : Distribute traffic evenly using a round-robin approach

  • Health check setting

    - Interval, service timeout, and probe timeout setting
    - Protocol setting (ICMP, TCP, HTTP, HTTPS) and service port setting
    - DB health check based on DB checkup scripts (using Ishell function)

Pricing

    • Billing
    • Domain : Time of domain record usage set on GSLB
    • Health check resources : Time of resource usage after specifying the health check settings
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