Robert Clark wrote: > On Mon, 2007-06-11 at 11:05 +0100, Patrick Caulfield wrote: >> Robert Clark wrote: > >>> Well, I was missing the dlm package. The system was still booting >>> occasionally without it. Now I've installed that, the device file is >>> being created in /dev/misc/dlm-control instead, but ccsd still spends >>>> 10 seconds waiting for it to appear and fenced often fails to start as >>> a result. >>> >>> Is the delay here likely to simply be udev being slow? >> It sounds like udev isn't creating it at all. What happens is that libdlm waits >> 10 seconds for udev to create the device file, and if it doesn't appear after >> that time it will do the job itself. >> >> Not being a udev expert I'm not really sure why that might be. > > As an experiment, I've tried just loading the dlm module on a node > with no cluster services running and confirmed that dlm-control is being > created by udev. > > I must admit - I'm pretty confused now about the role of libdlm. Since > it turns out that I've been running a 4U4 cluster without the dlm > package installed (and so no libdlm) and, until this morning, my 4U5 > cluster in the same state, I'm wondering: What uses libdlm? > I don't think anything is, that might be the problem. But magma (which ccsd uses to talk to the cluster manager) checks for the existence of dlm-controld anyway! just in case you need to create any locks using magma I suppose. -- Patrick Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 ITE, UK. Registered in England and Wales under Company Registration No. 3798903 -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
