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I have 6 Woodcrest machines with one acting as an NFS server. 3 machines are in the server room plugged directly into a Netgear 1GB switch. These 3 are all running RHEL4 U 3. The other 3 machines are in a rack in our office. They are all connected to a Netgear 1GB switch that is connected to a wall jack that goes into a patch panel in the server room and eventually ends up at the initial switch. The 3 systems in the rack are RHEL4U6. When we run our application, then save the data on both the NFS server and one of the NFS client machines in the server room, the save takes just a second or 2. But, when I save on one of the servers in the office the save takes nearly a minute. I checked the 2 switches and they show all relevant connections as being 1GB. So, the differences between machines are: 1. NFS client in server room RHEL4U3, connected directly to the switch. 2. NFS client in office RHEL4U6 connected to a 1GB switch that is connected via an office patch panel to the switch in the server room. Note that when I ping the systems from the server room, I get similar responses (under .5ms) All the systems are on the same subnet. I am not seeing any nfs related messages on any of the client machines. Eventually all the servers will be in the rack on the same switch, but I don't want to put the rack into the server room until we get our KVM. My thoughts are the delay may have something to do with latency. I ran a network test, thrulay, between several of the NFS client servers and the NFS server, all with pretty decent bandwidth: 936.5 Mbps and 940.6 Mbps on the servers in the office, and 940.7 and 941.3 on the servers in the server room. The 2 office servers were being used more heavily at the time, but I would say the data rates are consistent. I've got plenty of memory on those systems in the server room (16GB) and I'm not showing any swap activity. The question is any idea why the 2 RHEL4U6 systems seem to have such poor NFS performance. -- -- Jerry Feldman <[hidden email]> Boston Linux and Unix PGP key id: 537C5846 PGP Key fingerprint: 3D1B 8377 A3C0 A5F2 ECBB CA3B 4607 4319 537C 5846 _______________________________________________ Discuss mailing list [hidden email] http://lists.blu.org/mailman/listinfo/discuss
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