Is there a mandatory order to use when bringing up nodes in a cluster? I usually do: OSTs MDS Clients I do this by hand, which is OK for now, but will become an issue as my cluster gets bigger. Can anyone recommend a way to automatically start lustre in the desired order? -Roger _________________________________________________________________ Is your PC infected? Get a FREE online computer virus scan from McAfee® Security. http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963
On Fri, 18 Aug 2006, RS RS wrote:> Is there a mandatory order to use when bringing up nodes in a cluster? > > I usually do: > OSTs > MDS > ClientsWe do this too. The MDS connects to the OSSes, so it makes sense to start it after; same for clients.> I do this by hand, which is OK for now, but will become an issue as my > cluster gets bigger. > > Can anyone recommend a way to automatically start lustre in the desired > order?Use our GPLed admin tools. :) http://www.bullopensource.org/lustre/ Plus, they do a nice job of parallelizing mkfs, OSS startup, as well as client mounts, and have many other great features too. </shameless plug> -- Jean-Marc Saffroy - jean-marc.saffroy@ext.bull.net
Jean-Marc Saffroy wrote:> On Fri, 18 Aug 2006, RS RS wrote: > >> Is there a mandatory order to use when bringing up nodes in a cluster? >> >> I usually do: >> OSTs >> MDS >> Clients > > > We do this too. The MDS connects to the OSSes, so it makes sense to > start it after; same for clients.FYI, in Lustre 1.6 the OST/MDT ordering requirement is eliminated. Clients must still be started after the (new obd) MGS, in order to retrieve their configuration logs, but can be started before OSTs and MDT (but will not be usable).
On Fri, 18 Aug 2006, Nathaniel Rutman wrote:>> We do this too. The MDS connects to the OSSes, so it makes sense to start >> it after; same for clients. > > FYI, in Lustre 1.6 the OST/MDT ordering requirement is eliminated. Clients > must still be started after the (new obd) MGS, in order to retrieve their > configuration logs, but can be started before OSTs and MDT (but will not be > usable).For our tests we usually have the MGS and MDS in the same device, so in such a case, the order still matters (except it''s reversed). As for clients started before the OSTs, I would suspect it''s not a very common use case, is it? -- Jean-Marc Saffroy - jean-marc.saffroy@ext.bull.net