From: Greg Ercolano <erco@(email surpressed)> Subject: [Q+A/WINDOWS ADMIN] No more connections can be made to this remote Date: Thu, 08 Jan 2009 20:01:36 -0500 |
Msg# 1819 View Complete Thread (1 article) | All Threads Last Next |
> We have a problem where we're getting this error > from some of the machines on our farm: > ******************************************************* > ERROR: can't create log: //server001/XSI/Scenes/bw12.scn.log: > No more connections can be made to this remote computer at > this time because there are already as many connections as the > computer can accept. > ******************************************************* > > All the systems used are Windows2000 Professional. > And the number of machines used for a rendering is 10. This is a standard Microsoft error when a machine tries to open a file on a file server that has maxed out its CAL licenses. In this case, there are too many file sharing connections open to file server //server001/XSI/. Microsoft devotes several "Knowledge Base" (KB) articles to this: 1) http://support.microsoft.com/kb/314882 2) http://support.microsoft.com/kb/328459 3) http://support.microsoft.com/kb/122920 The error is also covered pretty well on Usenet, eg: http://groups.google.com/group/microsoft.public.windowsxp.network_web/browse_frm/thread/1a5c4a7ed0f4d954?hl=en&lr=&ie=UTF-8&oe=UTF-8&rnum=7&prev=/groups%3Fhl%3Den%26lr%3D%26ie%3DUTF-8%26oe%3DUTF-8%26q%3DNo%2Bmore%2Bconnections%2Bcan%2Bbe%2Bmade%2Bto%2Bthis%2Bremote%2Bcomputer%2Bat%2B%26btnG%3DGoogle%2BSearch&fwc=1 If "server001" is running Windows 2000 Professional, there can only be 10 NTFS connections open at a time. Any more than that you would need to get Windows 2000 Server. On host 'server001', go into 'My Computer' and right click on the 'XSI' share, and check what the 'User Limit' is set to. You will find that, for Win2K professional, there's a 10 user/remote host connection limit. Microsoft says this cannot be changed for their "Professional" series of products; you /have/ to upgrade to one of the Microsoft "Server" products which support more than 10 connections, and you can purchase more "CAL" licenses to increase the connection count. (CAL=Client Access Licenses). Microsoft is unusual in that the license their file server's connections. A connection is "per-user", "per-share". This means even if there's one share, a single workstation might still use up more than one connection for that share, if more than one user account is actively accessing the share. This problem will appear to be intermittent, as connections will timeout after 15 minutes of inactivity, freeing them up. Then different machines will have the problem. Even users may encounter the error while opening files interactively. Administrators of Microsoft file servers have to make sure file servers have enough Microsoft's CAL licenses to support their entire render farm and workstation users all working concurrently. This is why many companies do not use Microsoft machines for file servers, to avoid the CAL licensing issues. The solution is to either: 1) Add more Microsoft CAL licenses to your "Server" 2) If your server is running a workstation version of Microsoft's OS, (XP Pro, 2K Pro, etc), you will need to install Microsoft "Server" instead. The workstation OS's are limited to 10 connections, period. 3) Use a non-Microsoft file server, eg. Mac, Linux, or some third party file server, like NetApp, BlueArc, Isilon, etc.. |