Hi Andrew, Thanks for answering my question. While looking at the current source tree, I noticed newer versions, at least dlm_controld, will not use cman anymore. So I'll keep using 3.0.12 for now (with dlm_controld.pcmk). Do you have any estimate on the first release without cman? Regards, Jeroen > -----Original Message----- > From: linux-cluster-bounces@xxxxxxxxxx [mailto:linux-cluster- > bounces@xxxxxxxxxx] On Behalf Of Andrew Beekhof > Sent: Monday, June 27, 2011 1:24 AM > To: linux clustering > Subject: Re: relationship corosync + dlm + cman in > cluster 3.1.3 > > On Wed, Jun 22, 2011 at 5:55 PM, Jeroen Koekkoek <j.koekkoek@xxxxxxxxx> > wrote: > > Hi, > > > > I have a question regarding the relationship between Corosync, DLM, > and CMAN. Is the following statement correct? > > > > The DLM is a kernel module, dlm_controld is the control daemon. > > CMAN is the old messaging layer, and is now stacked on OpenAIS, which > in turn is stacked on Corosync. > > > > The DLM does not use CMAN (or Corosync for that matter) to > communicate, but does fetch node information from CMAN. > > > > The filesystem (GFS or OCFS2) speaks to the DLM locally (in kernel?) > and the DLM takes care of the communication. > > > > > > Now for the real question. > > > > In the 3.1.3 release dlm_controld still depends on CMAN, but is it > safe to say that I can just use Pacemaker and Heartbeat resource agents > and only install CMAN so that dlm_controld can query node information? > > > > Or did I misunderstand the documentation? > > You need to make sure everyone is getting the same membership and quorum > information. > So yes, install CMAN for dlm_controld but also tell pacemaker to use it > too (make sure you're on 1.1.5 or higher). > > > > > Regards, > > Jeroen > > > > -- > > Linux-cluster mailing list > > Linux-cluster@xxxxxxxxxx > > https://www.redhat.com/mailman/listinfo/linux-cluster > > > > -- > Linux-cluster mailing list > Linux-cluster@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/linux-cluster -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
