B4J Question How many clients can jServer handle

[aminoacid]

I have a B4J WebSockets application that I am testing and have been trying to find out how many simultaneous client connection it can handle without crashing. I realize that it uses the Jetty server but have not been able to find any straightforward answer to this question. Also, is there any way to monitor the number of client connections to a websockets server?

Any information on this would be greatly appreciated. Thansk!

 

[EnriqueGonzalez]

straightforward answer to this question

And this is correct. If the connection was only a ping pong call, then the answer would be thousands upon thousands.

The more complex your app it may be a bit slower. I may say hundreds upon hundreds?

Jetty the underlying technology is well proven and has good responses, so, then, my best advice would be: don't think about it too much.

"Make it work, then make it beautiful, then if you really, really have to, make it fast. 90 percent of the time, if you make it beautiful, it will already be fast. So really, just make it beautiful!" - joe Armstrong.

If you begin to feel that it is slowing because you have tens of thousands of calls, then just deploy a second server. Its that simple

 

[aminoacid]

And this is correct. If the connection was only a ping pong call, then the answer would be thousands upon thousands.

The more complex your app it may be a bit slower. I may say hundreds upon hundreds?

Jetty the underlying technology is well proven and has good responses, so, then, my best advice would be: don't think about it too much.

"Make it work, then make it beautiful, then if you really, really have to, make it fast. 90 percent of the time, if you make it beautiful, it will already be fast. So really, just make it beautiful!" - joe Armstrong.

If you begin to feel that it is slowing because you have tens of thousands of calls, then just deploy a second server. Its that simple

Thanks for the advise, Enrique. Sometimes it's hard to imagine a B4J application handling a large client load.

Do you know of any way to monitor how many clients are connecting to the server at any give time?

 

[EnriqueGonzalez]

how many clients are connecting to the server at any give time?

In the past i have used traeffik to the get that information.

Traefik, The Cloud Native Application Proxy | Traefik Labs

Traefik is the leading open-source reverse proxy and load balancer for HTTP and TCP-based applications that is easy, dynamic and full-featured.

traefik.io

But i think it's an overkill. Now days I just log sessions stamps on my db and it's enough.

 

[aminoacid]

But i think it's an overkill. Now days I just log sessions stamps on my db and it's enough.

Yes, I agree. I think I'm just going to keep track of the number of connects and disconnects in my application and come up with an estimate.

 

[EnriqueGonzalez]

I think I'm just going to keep track of the number of connects and disconnects in my application and come up with an estimate.

Yes connections and sessions

[WebApp] Chatroom - Threads, Sessions and Server events

Online example: http://basic4ppc.com:51042/chat/index.html This example demonstrates several important concepts of the web app framework. Multiple pages The chatroom is made of two pages. The login page and the chat page. The WebSocket is broken when the browser navigates to a different page...

www.b4x.com

So you get. Unique users and connections per user.

 

[aminoacid]

Yes connections and sessions

[WebApp] Chatroom - Threads, Sessions and Server events

Online example: http://basic4ppc.com:51042/chat/index.html This example demonstrates several important concepts of the web app framework. Multiple pages The chatroom is made of two pages. The login page and the chat page. The WebSocket is broken when the browser navigates to a different page...

www.b4x.com

So you get. Unique users and connections per user.

Yes... That's exactly what I was looking at

 

[Erel]

Sometimes it's hard to imagine a B4J application handling a large client load.

???
B4J jServer has excellent performance. I've posted some numbers here: https://www.b4x.com/android/forum/threads/server-performance-measures.37502/#content

 

[aminoacid]

???
B4J jServer has excellent performance. I've posted some numbers here: https://www.b4x.com/android/forum/threads/server-performance-measures.37502/#content

That's Awsome! The capabilities of the B4X suite of tools never fails to amaze me. Thanks!

 

[tchart]

And here, I’ve managed to get over 4000 requests per second.

jServer & SQLite [Multiple Request Stress Test]

Should I use SQLite as my web server database? This has come up before and last week it came up again in the "Chit Chat" forum. The question has already been answered here before and there are many arguments for and against using SQLite, especially when you have lots of users who may be reading...

www.b4x.com

 

[Magma]

I ve never had problem... jServer with any SQL Server or SQLite tried... working too fast !

I think it is much faster from an Apache Server with same PC Specs !!!!

 

[Intelemarketing]

Magma said "I ve never had problem... jServer with any SQL Server or SQLite tried... working too fast !"

My biggest concern would not be "Does the server slow down" - as speed would naturally fluctuate dependant on the number of online accesses.
I would be concerned that the server might crash if the traffic was very large.
I am not hearing from anyone that they experience server crashes.

That is music to my ears !

 

[Erel]

I am not hearing from anyone that they experience server crashes.

I'm running probably 10 different B4J servers. Some of them run for more than a year and are only restarted when the hosting server is restarted.

 

[Intelemarketing]

I'm running probably 10 different B4J servers. Some of them run for more than a year and are only restarted when the hosting server is restarted.

Absolute music to my ears !
Thank You