(see feature comparison)
There are also three types of paid licenses which give you the option to choose one that best suits your needs.
For the Enterprise edition, there is a 15-day free trial and a 30-day money back guarantee.
A license does NOT require the licensed CPU cores to match the amount of CPU or cores of your physical server. It simply denotes the number of CPUs that the LiteSpeed server process utilizes. LiteSpeed web server itself is very lightweight and does not consume as much CPU or memory as MySQL and PHP does.
If your server has more than one CPU core, you may choose between 1, 2, 4 or 8 CPU licenses. If you have a very powerful server with several dozens of CPU cores available, please contact sales for customized build solutions.
|Server CPU(core(s))1||< = 2GB RAM||> 2GB RAM < 8GB RAM||> 8GB RAM|
|1||VPS||Ultra VPS||1 or 22|
|2||VPS, 1||Ultra VPS, 1||1 or 23|
|4||VPS, 1 or 2||Ultra VPS, 1 or 2||1, 2 or 43|
|6||VPS, 1 or 2||Ultra VPS, 1 or 2||1, 2 or 4|
|8||VPS, 1 or 2||Ultra VPS, 1 or 2||1, 2, 4 or 83|
|12||N/A||N/A||2, 4, 8 or contact sales|
|16||N/A||N/A||2, 4, 8 or contact sales|
|24||N/A||N/A||2, 4, 8 or contact sales|
|32||N/A||N/A||2, 4, 8 or contact sales|
|48||N/A||N/A||2, 4, 8 or contact sales|
|64||N/A||N/A||2, 4, 8 or contact sales|
|80||N/A||N/A||2, 4, 8 or contact sales|
Some factors to consider:
For example, if you have a 4-core server and run LSWS, PHP, and MySQL on the same server, you can buy 1 or 2-CPU license, as your other CPU power will be fully utilized by PHP and MySQL processes. Usually for a 4-core server, you will not need anything higher than a 2-CPU license if you have other external applications like PHP or RoR.
This requires more CPU power for encryption.
These are served by LSWS directly, so more CPU will help. If your server is mainly PHP/MySQL powered, a 4-CPU license may not help much as LiteSpeed will not be the bottleneck.
Like all other lightweight web servers, blocking disk I/O will block LiteSpeed's process. Therefore, if your server has high I/O wait, you should consider a higher CPU license in order to compensate. Since version 4.1, LiteSpeed has supported AIO (asynchronous IO).
There is limit for max concurrent connections for different licenses. The free version has a limit of 150, the VPS license, 500, Ultra VPS, 600, and the Enterprise edition is unlimited. You can check the number of concurrent connections used from the real-time report under web admin console, or use the command
netstat -an | grep 80 | grep ESTA | wc
Remember, though, only “established” connections from netstat output are considered to be concurrent. For example, a forum with 3,000 users online might only use 300 concurrent connections, as those 3,000 users do not all execute actions at the exact same split second.