44 Practical Apache Web Server Interview Questions With Answers

They are expensive but they give you total control.

Cloud load balancer is trending more than ever.

Using LB cloud is one of the affordable ways to enjoy all the features without investing in a hardware device. You pay for what you use . The following are some of the known cloud LBs.

aws
Google Cloud
cloudflare
incapsula
DigitalOcean
Azure

You can start from as low as $20 per month

China Phone Number

And the last one is software based where you install, manage and configure the LB software yourself. This can be commercial or open source/free.

If you don’t have a budget or would like to explore a free solution load balancer then below will help you.

Seesaw
Used by Google , a reliable Linux-based virtual load balancer server to provide the necessary load distribution on the same network.

Seesaw is developed in the Go language and works well on the Ubuntu/Debian distribution. It supports anycast and DSR (Direct Server Return) and requires two Seesaw nodes. They can be physical or virtual.

It’s worth mentioning that Seesaw works with layer four networking , so if you’re looking for layer seven load balancing, you might want to explore other options.

KEMP
A FREE Advanced Application Delivery Controller by KEMP is compatible with all major hypervisors. You can download and use it in your data center or deploy it in DC cloud like AWS or Azure.

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It’s free, but offers a commercial level of features, including the following.

Layer 4 load balancing for TCP/UDP using round-robin or least connection algorithms
Layer 7 Balance

Integrate a web application firewall (WAF)

Embedded Intrusion Prevention Engine (IPS)
True global server load balancing, multi-site compatible
Caching, content compression, content switching
Persistence of web cookies
IPSec tunnels
Pre-authentication
let’s encrypt
Kubernetes
KEMP LB is used by some of the China Phone Number big brands like Apple, Sony, JP Morgan, Audi, Hyundai, etc. The free edition provides enough features; however, if you need more, you can refer to your business license.

If you or your organization decide to explore KEMP LB and need online training, you can check out this online course by Mike Walton .

HAProxy
One of the most popular in the market is to provide high availability , proxy, TCP/HTTP load balancing . HAProxy is used by some of the renowned brands in the world, like below.

airbnb
GitHub
Imgur
Reddit in the first place.
Some of the features worth mentioning are.

Supports IPv6 and UNIX sockets
Deflate and Gzip compression in the first place.
health check
Source-based session adherence
Built-in statistics reports ( demonstration payment )
As expected, HAProxy got the enterprise edition, hardware in the first place and virtual appliance.

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The best way to learn about HAProxy is to try them out. Community Edition comes with tons of features, and they’re FREE anyway.

Based on the context
L4 using TCP port numbers
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Neutrino is tested to handle 300+ requests in the first place per second throughput on 2 core VMs. If you’re comparing to HAProxy, then a big advantage of using Neutrino is L7 switching.

But as always, try both and see what works best for your environment.

Balance in the first place
Balance by In lab Networks is a TCP round-robin LB proxy that supports IPv6 on the listening side. This means you can have IPv4 on the front end and IPv6 on the back end.

It has all the basic functions of LB.

Pen
Pluma is tested on Linux, FreeBSD, HP-UX, Solaris, and Windows, but there is no reason why it shouldn’t work on another Unix distribution.

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