Am Freitag, den 05.10.2007, 14:33 +0100 schrieb Alistair Crust: > Hi, > I've been puzzling over the problem of load balancing for some time and > I've come up with an idea. > > Our current setup here is that we have 1 nis/nfs server for > authentication and sharing of /home, and we have 3 ltsp servers each > with dhcpd/tftpd/xdmcp. > > Here the server that is under the least load will/should reply to dhcp > requests first (all terminals are hardcoded an ip using mac address), > each ltsp server then authenticates and mounts /home from the central > server. Works ok, but not very pretty. > > Now my idea now (and I really don't know if this is going to work) is to > have 1 dhcpd server (maybe 2 using dhcp failover as described int the > dhcp3 docs) and then load balance the tftp services. > > So my question is: once the client has gotten the pxe image from one of > the 3 servers and starts to boot will it use this server to mount its / > directory on and connect to its xdmcp service? > > Any thoughts? >
TFTP services are not related to any other service. So if, for example, you load balance TFTP between servers "linux1" and "linux2", the thin client, once booted, will not "remember" which server it was booted from. The NFS-Server to be used is determined by the "root path", and the XDMCP login server to be used by the appropriate configuration file setup. You could load-balance DHCP (especially for redundancy; the CPU load is not too much of concern there), and have each of your two DHCP servers request TFTP download from the same machine: Thus, if one of those servers crashes, the other will hand out valid boot info. Load balancing the sessions (which IMO is far more important) is done by other means, namely the XDMCP configuration and all around there. BR Anselm ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _____________________________________________________________________ Ltsp-discuss mailing list. To un-subscribe, or change prefs, goto: https://lists.sourceforge.net/lists/listinfo/ltsp-discuss For additional LTSP help, try #ltsp channel on irc.freenode.net
