Draft:Client-side Global Server Load Balancing: Difference between revisions

Revision as of 08:54, 5 May 2025

Latest revision as of 09:36, 5 May 2025

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== Client-side Global Server Load Balancing ==

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Unlike traditional Global Server Load Balancing (GSLB), which depends on DNS-based redirection or dedicated load balancing appliances, CS-GSLB delegates the decision-making process to the client application, browser, or embedded script. This technique enables real-time evaluation of server health, performance, and proximity directly from the user's device.

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== Overview ==

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Clients typically retrieve metadata about available servers using lightweight mechanisms such as DNS TXT records, HTTP endpoints, or embedded configuration files. Based on this information, the client then initiates a direct connection to the optimal server without requiring intermediary redirection.

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== Architecture ==

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* '''Bypasses DNS limitations''': Works well in scenarios where DNS-based load balancing is unreliable due to caching or propagation delays.

* '''Resiliency''': Enables fast failover between regions or clouds without relying on central infrastructure.

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== Disadvantages ==

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* '''Security considerations''': Information about server infrastructure must be exposed to the client, which may raise security concerns.

* '''Dependency on client execution''': If client logic fails or is blocked (e.g., by browser extensions), load balancing may degrade.

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== Use Cases ==

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* '''SaaS platforms''' needing fine-grained control over where users connect.

* '''Disaster recovery''' setups that rely on client failover to alternate regions or availability zones.

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== Comparison with Traditional GSLB ==

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|Distributed

|}

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== Standards and Implementations ==

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* [https://techdocs.akamai.com/edgeworkers/docs/welcome-to-edgeworkers Akamai EdgeWorkers]

* [https://workers.cloudflare.com/ Cloudflare Workers]

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== Related Concepts ==

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* '''Content Delivery Network (CDN)'''

* '''GeoDNS'''

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== References ==