High Availability

Smart Load Balancing Solution

Automatically distribute your web application traffic across multiple servers. Even if a single server fails, your users continue to receive uninterrupted service.

Get Started Distribution Algorithms
Load Balancer
Uptime
%99.99
Latency
<1ms
Layer
L4/L7
Scale
∞

How Does Load Balancer Work?

Distribute your traffic smartly, increase performance

  1. 1. Traffic Arrives

    When users connect to your domain, traffic is first directed to the Load Balancer. Your DNS record points to the LB's IP address.

  2. 2. Distribution Happens

    Traffic is distributed to backend servers according to the algorithm you choose (Round Robin, Least Connections, IP Hash).

  3. 3. Health Check

    The health check mechanism regularly checks servers. Problematic servers are automatically removed from the pool.

Advanced Features

Layer 4 Load Balancing

Load balancing at TCP/UDP protocol level. Ideal for databases, game servers, DNS, and mail servers. Low latency and high throughput.

Layer 7 Load Balancing

HTTP/HTTPS application layer load balancing. URL path, header, cookie-based routing. Sticky session support. Can be used as an API gateway.

SSL Offloading

Lighten the load on your backend servers by performing SSL/TLS encryption and decryption on the Load Balancer. Let's Encrypt automatic certificate management.

Failover

Active-passive or active-active configuration. If the primary server fails, traffic is automatically redirected to backup servers. Zero downtime.

Distribution Algorithms

AlgorithmDescriptionUsage
Round RobinSequential distributionWeb, API
Least ConnectionsTo least connectedWebSocket, database
IP HashSame IP → same serverSessions, e-commerce
WeightedWeighted distributionMixed-capacity servers

Frequently Asked Questions

A minimum of 2 backend servers is recommended. However, you can use it with a single server — in this case, you still benefit from SSL offloading and health check features. We recommend starting with at least 2 servers for high availability.

Sticky session ensures all requests from a user are directed to the same backend server. It is required for e-commerce sites, shopping cart operations, and session-based applications. It is achieved through cookie or IP hash method.

Yes, you can upload your own SSL certificate. Additionally, free SSL certificates can be automatically created and renewed with Let's Encrypt. Wildcard certificates and multi-domain certificates are also supported.

IzCloud Load Balancer can handle hundreds of thousands of connections per second. It operates with sub-1ms latency in Layer 4 mode. In Layer 7 mode, 2-5ms latency including SSL processing is expected. There are no bandwidth limitations.

Scale Your Applications

High availability and performance with Load Balancer.

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