We've been slowly converting our servers over to LS and our first server, we purchased a dual-core license for our quad-core server.

On our second server, we purchased a dual-core license on a dual-core server and are wondering if it's overkill.

How many cores did you purchase your LiteSpeed license for?

All ours are dual core licenses but you may be fine with single core licenses as well. We are using Dual 5430's and Dual 5520's though so OS is seeing 8-16 cores (includes HT ones) depending on the CPU. Since the core portion is just the number of children lsws processes essentially you really don't need more than 1-2. Most machines all the CPU usage is coming from PHP or MySQL anyways not serving actual static files.

Thanks. I knew that we didn't need to purchase a license equal to the number of cores on our servers, but I was just wondering what everyone else was doing.

Especially would like to know if anyone is using the single core license and notice any issues or a big performance hit.

Especially would like to know if anyone is using the single core license and notice any issues or a big performance hit.


What the multiple cores helps with is in situation where you're i/o bound. It's just due to how the scheduler works and how much i/o a process will be given. If there are more processes then lsws in general has more i/o to play with. They are working on making it even less necessary though with aio and other optimizations to make heavy i/o situations cause less slow downs.

We used it originally for this exact reason although these days it seems less necessary. We cannot i/o stress SAS drives enough for it to matter. When we had some SATA drives was far easier for someone to cause i/o wait for other processes which would then slow down the web server.

Mine was either a single or a dual (probably a dual core license). I had a quad server and it seemed like plenty enough for me at least. Not sure if the quad license makes much of a difference though.

Hold up, so technically we don't have to buy a license for the amount of cores we have per server?

Because I've been wanting to buy a litespeed license for a while, saw the pricing and didn't even research it anymore after that.

I have a Core2Quad 9300 in the main server, any tips/suggestions for me?

Thanks!!!

No, I think the average is 2 cores that people buy, but I'm wondering if one-core licenses are fine for dual-core servers. I'm thinking so, but I wanted to have someone's personal experience relayed.

I've read many use single core license on dual and quad cores. More cores deal with dos better too.

That, I would imagine.