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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
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YangXin, You have a very good understanding of the software. A cluster director does do TCP proxying, and it is usually more complex than the TCP proxy software I'm using on ultrazone (called Balance); <http://www.inlab.de/balance.html> In building a real cluster, I'd recommend LVS for load balancing and Heartbeat for high availability/failure detection; <http://www.linuxvirtualserver.org> <http://www.linux-ha.org> The only change I've made on your system so far is to the ldmd.conf file by changing ultrazone.ucar.edu to ultrazone.ucar.edu:8080 and restarting your LDM with "ldmadmin restart". I've also built balance in /usr/local/ldm01/tmp ans started it running; $ ps -ef | grep balance | grep 8080 ldm01 18415 1 0 Mar30 ? 00:00:00 ./balance 8080 localhost:388 Can you ask your network people to open port 8080 on your system so ECMWF and NCAR can connect to port 8080 on tigge-ldm.cma.gov.cn? In the long run, will it be simpler to use port 8080 or find out where and why the LDM port 388 is being throttled? Best Regards, mike On Apr 1, 1:24pm, <address@hidden> wrote: > Subject: Re: Re: tigge config > >Hi, Mike, > >------------------------------------------------------------- > From: Mike Schmidt > Date: 2007-03-30 22:54:09 > To: address@hidden > Cc: > Subject: Re: tigge config > >>YangXin, >> >>The TCP Proxy software could be used to create a cluster environment, but >>is probably not the recommended way to implement a cluster. If you plan >>on building a cluster, there's better software to use which I can recommend. > >I'd like to know that software, please tell me something about it. I have read >the chapter "LDM Cluster" when I was studying LDM, you said "TCP Proxy" which >remind me of the Director Servr which I guess has proxy software running on it, >maybe they are different softwares, I did not understand it well. > >> >>I've had an email discussion with Doug Schuster yesterday, and I have the >>approval to make the required changes on ultrazone. >> >>One we confirm (or disprove) the changes will work, we'll request the >>necessary changes at ECMWF as well. >> >>Do I have your permission to make minor changes to the ldmd.conf and >>restart the LDM with "ldmadmin restart"? >Yes, please, and thank you. Just let me know some important part of these >changes if it will not take you much time. > >Best Regards, > >YangXin, >Apr 1st.