Maximum Concurrent CIFS/AFP/FTP Connections ?

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Maximum Concurrent CIFS/AFP/FTP Connections ?

Unread post by omorin-en » Fri Jun 16, 2017 10:05 am

Bonjour from France,

I'm looking for a NAS for 350 users in a Windows domain.

The RS3617xs+ specifications says "Maximum Concurrent CIFS/AFP/FTP Connections : 2048".

Right now, my MMC console show me about 5500 opened files on my actual file server.

So, what Synology meam by "Concurrent CIFS/AFP/FTP Connections ", sessions, files opned, lock,...

Thanks for helping.

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Re: Maximum Concurrent CIFS/AFP/FTP Connections ?

Unread post by drabisan » Fri Jun 16, 2017 12:15 pm

SMB, AFS are using a single TCP connection from any computer to any computer. No matter what activity needs to be done. That's one of the problems - a packet drop lower the TCP window and all activities are slowing down. Microsoft has multi-stream implemented in w7, 8, 10, server 2003+ and that opens more than one connection when it needs to. But multi-stream is not official in Samba as of today so you can count a single connection per client.

FTP uses 2 ports so 2 connections at any given moment.

That is what Synology count as concurrent connections AFAIK.

I'm sure some other users here are using some high-end models with large number of users and they can share their experience.

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