Seth, Just some basic ideas here. Can you verify that the back to back connection between servers is actually connected at 1 gig ? Also, check to be sure that the NIC settings are auto-everything - speed, duplex, flow-control, etc...They should match each other.
-David Palmer On Tue, Sep 1, 2009 at 4:07 PM, Seth Galitzer<[email protected]> wrote: > I've got 24 Sunray 2FS DTUs hanging off a single SRSS server (whitebox, 2x > Xeon 2.6GHz CPU, 6GB RAM, Solaris 10). By default, they connect to a > Windows Terminal Server (SunFire X4600, 4x Opteron 8218 2.6GHz CPU, 16GB > RAM, Windows Server 2003) via srwc. The DTUs are on a completely separate > subnet from the rest of my network. The SRSS host has a single interface > that is on this subnet that is used for all DTU communication. The SRSS > host also has a direct cable link (crossover cable) to the WTS host. Both > the SRSS host interfaces and the WTS interface are all 1Gbps. > > This setup is used in a classroom lab setting. During class, there can be > anywhere from 10-20 students using the lab at the same time. We are a > computer science program, so students use development platform applications, > such as Eclipse, Visual Studio, and Rational System Architect (formerly > Rational Rose), among others. In my second year of running this system, we > seem to be having significant performance problems with a large number of > users trying to load applications simultaneously. eg, if a class comes in > and they all login and try to load eclipse, the system will grind to a halt > and become completely unresponsive until the app is loaded for everybody. > This can take up to 30 min before the DTUs are usable. > > I've been monitoring resource usage on the WTS host using Sysinternals > Process Explorer > (http://technet.microsoft.com/en-us/sysinternals/bb896653.aspx). As far as > I can tell when the system gets bogged down like this, I am not seeing any > CPU. memory, or I/O wait causing the latency. The CPU utilization jumps > around between 20-60%, and I only see usage spikes on 2 of the 8 CPU cores. > RAM utilization stays absolutely stable, right around 4GB of my 16 > available. File I/O is barely noticeable. > > So the next thing I'd like to look at is the resource consumption of the > SRSS host. Can anybody point me at some good tools for this? I'd also like > to monitor the network usage and see if there's a bottleneck there. Again, > if there are any tools for this, or specific SRSS-related tools, please let > me know. > > If anybody has any good load-balancing tips for my situation, I'd love to > hear them. I'm running SRSS 4.1 and srwc 2.1, I have not yet updated to the > latest release. I love my SunRays, but if this continues to be a problem, > I'll have to scrap them and go back to maintaining 24 PCs again. I want to > avoid this at all cost. > > Thanks. > Seth > > -- > Seth Galitzer > Systems Coordinator > Computing and Information Sciences > Kansas State University > http://www.cis.ksu.edu/~sgsax > [email protected] > 785-532-7790 > _______________________________________________ > SunRay-Users mailing list > [email protected] > http://www.filibeto.org/mailman/listinfo/sunray-users > _______________________________________________ SunRay-Users mailing list [email protected] http://www.filibeto.org/mailman/listinfo/sunray-users
