General discussion

Locked

Maximum number of clients

By Butzmann ·
What is the maximum -- say allowed -- number of computers I can connect to one interface card in NT Server machine? More specifically -- when should I think of installing the second card to avoid lags?

Thank you in advance.

This conversation is currently closed to new comments.

9 total posts (Page 1 of 1)  
| Thread display: Collapse - | Expand +

All Comments

Collapse -

Maximum number of clients

by oskiller In reply to Maximum number of clients

The number is going to vary so widely, you cannot get a good answer. Generally you will run into problems with the server memory and processor before you run into a network bottleneck. If you are running a 100Mb Full-duplex card, you will probably not run into network bottlenecks unless you are really thrashing the network. I've had over 1000 clients being served by one machine without a problem before.

What is the function of the server?

Collapse -

Maximum number of clients

by oskiller In reply to Maximum number of clients

There is no physical limitation other than that of the total traffic. 10,000 users doing nothing more than authenticating will use less traffic than 100 users constantly querying and updating a large database.

Based on what you said, your should be fine. I would double check your system settings and run performance monitor to see where your true bottleneck is. Adding another card might help some, but you need to make sure that the network is really your problem. Additionally, it may not be your network card, but your network itself. If there is too much traffic on the network, adding another card will not help the situation - you would need to look at how the network itself is setup.

Collapse -

Maximum number of clients

by Butzmann In reply to Maximum number of clients

Poster rated this answer

Collapse -

Maximum number of clients

by Butzmann In reply to Maximum number of clients

err... sure... implicitly any NIC is 100 Mb full duplex, server role is PDC & File Server... and let's complex it -- application server. It is Dual PIII-933 with 512 Megs of RAM, USCSI-160. The problem is that I can't afford more than a new NIC and a hub/switch.
But... there should be a kind of physical limitation, should there?

Collapse -

Maximum number of clients

by Zen37 In reply to Maximum number of clients

Theoretically, you can connect A LOT of users on one PDC (in the multiple thousands at least). But that won't affect your system as much as 100 users that print 10 Mb print jobs and save 25 Mb excel files every 10 mins.

Load of the network is what you should be looking at. Do you have the means to verify that? If you do and you notice that you are, say 40% of load. You will have problems. Are you getting collisions? CRC errors? Misaligned or trunkated packets? All these will createlag without having a lot of users on your server.

You might want to check your servers ressources also. One process maybe hogging too much memory or CPU.

Good luck.

Collapse -

Maximum number of clients

by Butzmann In reply to Maximum number of clients

Poster rated this answer

Collapse -

Maximum number of clients

by rkelly In reply to Maximum number of clients

The number of users that you can connect will vary widely based on 2 main factors (given that you have a fixed machine spec for the server).

1 Type of user

The more users who actually perform work related tasks on the server then the fewer it will support. Printing is one of the most demanding user based tasks as it takes large amounts of bandwidth, processing, disk space etc for each print job.

2. Network infrastructure

If you have hubs then you will get more collisons and hence more network retransmits than if you used switches everywhere on the network. The better the infrastructure the more efficiently the bandwidth the server will be utilised and so more people can use it.

Thereotically the limit is something like 15 billion connections, practically if it is performing file, print and application server roles I would be tempted to use no more that 150 users on a single server. Obviously that is a very rough and ready figure from experience and in truth I should tell you to run capacity testing software on your server - but it nearly always comes out as a massive number of users and if you attempt it in real life the server cannot cope.

Collapse -

Maximum number of clients

by Butzmann In reply to Maximum number of clients

Poster rated this answer

Collapse -

Maximum number of clients

by Butzmann In reply to Maximum number of clients

This question was closed by the author

Back to Networks Forum
9 total posts (Page 1 of 1)  

Related Discussions

Related Forums