The document discusses web servers and compares LiteSpeed WebServer to other options like Apache and Nginx. It notes that LiteSpeed is an event-driven web server that can serve as a drop-in replacement for Apache. OpenLiteSpeed is the open source version that can be compiled and run on Linux/Solaris/FreeBSD systems. The document compares features of OpenLiteSpeed to Apache and Nginx, noting advantages like better performance under heavy traffic loads. LiteSpeed Cache is also discussed as an open source caching solution to improve page load speeds.

1. Gabriel Răileanu
December 11, 2019

2. Agenda
1. Web Server? Why we need it?
2. LiteSpeed
3. LiteSpeed WebServer VS others
4. LiteSpeed Cache
5. Q/A?
2

3. Web Server? Why we need it?
3

4. - web serving
- load balancing
- cache acceleration
4

5. LiteSpeed WebServer
- C/C++
- event-driven architecture
- Apache drop-in
- Anti-DDoS protection
- HTTP 1.1/2.0/3.0
- runs on Linux/Solaris/FreeBSD/MacOSx
- used by many web hosting company, especially in last period
5

6. LiteSpeed WebServer
- the purpose of introducing this web server was to read Apache
configuration file
- lightweight software, based on resource conservation
- better than the general-adopted solution (Apache)
- but… paid
6

7. OpenLiteSpeed
- open-source GPLv3 version of LiteSpeed WebServer
- developed by LiteSpeed Technologies, with support from the
community
- the code is binary (needs to be compiled & executed by
sysadmin/DevOps/developers): optimized for your
computer/datacenter
- has no 1-click install, but are some scripts for easy run
developed by community 7

8. OpenLiteSpeed vs Apache
● Apache: still the most popular, but the oldest (free) web server
● LiteSpeed is an drop-in alternative for Apache (config files, rules,
mod_security, mod_rewrite)
● OpenLiteSpeed offers support for .htaccess files
● OpenLiteSpeed is asynchronous (because it’s event-driven).
Apache is process based.
● OpenLiteSpeed is better when a DDOS is initialized, better in
big traffic situations 8

9. OpenLiteSpeed vs Nginx
● both open-source, based on event-driven architecture
● unlinke OLS, Nginx is not Apache drop-in replacement
● Nginx does more than serving HTTP requests (load balancing,
reverse proxy, API gateway, firewall)
● OLS stores cached files, Nginx not
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10. 10

11. 11

12. LiteSpeed Cache
● open source; server-side page cache
● plugins for different platforms
● (dynamic) php content is compiled only once, then the
screenshot is served
● uses (Edge Side Includes)
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13. 13

14. Q/A?
14

15. 15