Hi Lance, > We ran into a situation yesterday, where it appears there is a limit > on > the number of targets that DM Multipath can use. We are switching to > a > switch/zoning configuration at our office which may present as many > as > 2500 targets to the system. Yesterday, we were testing a smaller > config, > and the limit on the number of targets appears to be 640. When we > exceed > 640, the system locks up. When we try 656 targets, it locks up, then > if > we back out the last 16 targets and replace them with 16 different > ones, > it still locks up. We backed off the zoning for the meantime (which > cripples the connection/bandwidth) to about 280 targets, but every > filesystem multipaths properly. > > Do you know what is going on, and is there some way to increase this > limit? Could you tell what is locking up, the kernel or multipathd? In general, both the kernel dm-multipath driver and multipath-tools can handle thousands of paths. You'll need to provide much more detailed material (log files etc). Regards, Martin -- Dr. Martin Wilck <mwilck@xxxxxxxx>, Tel. +49 (0)911 74053 2107 SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton HRB 21284 (AG Nürnberg) -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
