On Feb 07, 2008 15:05 -0800, Klaus Steden wrote: > When Lustre is configured in an environment where there are multiple paths > to the same destination of the same length (i.e. two paths, each one hop > away), which path(s) will be used for sending and receiving data?
That depends on how you configure it in /etc/modprobe.conf. > I have my cluster configured with two OSTs with two GigE NICs in each. I am > seeing identical performance metrics when I use LACP to aggregate, and when > I use two separate network addresses to connect them (ditto on the client > side). > > So what I'm wondering is if I've hit the peak performance of my disk array, > or if Lustre is just using only one path. The numbers I'm seeing in both > scenarios indicate 95% utilization of GigE, times two. I'm not sure I understand - if you are getting aggregate performance that is 190% of a single GigE from the client then you _have_ to be using both paths (assuming there are two GigE NICs in the client, and not four). > How can I get Lustre to use both paths simultaneously? ifconfig should show you clearly via TX/RX byte counts which NICs are being used in each configuration. Cheers, Andreas -- Andreas Dilger Sr. Staff Engineer, Lustre Group Sun Microsystems of Canada, Inc. _______________________________________________ Lustre-discuss mailing list [email protected] http://lists.lustre.org/mailman/listinfo/lustre-discuss
