Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Lars, Thanks for the reply. See below. > On Tue, Feb 17, 2009 at 03:52:16PM -0700, David.Livingstone at cn.ca wrote: > > Hello, > > > > I currently have two two-node clusters running heartbeat and drbd(see > > background below). I also have a two-node test which I decided to update > > to the latest releases of all. In so doing I downloaded and installed > > drbd 8.3.0(drbd-8.3.0.tar.gz) which includes three-node setups using > > stacked clusters. Specifically havng a third backup/brp node > > geograghically removed from our production cluster is very appealing. > > > > I have looked at the online manual(http://www.drbd.org/users-guide/) > > and read the current information for three-node setups and have some > > observations/questions : > > - An illustraion/figure of a three-node setup would help. > there are several ways to to it. > you can also have four nodes: two two-node DRBD, the primary of which is > the "lower" resource of a "stacked" DRBD. Are there some examples I can review somewhere ? > > - From your "Creating a three-node setup" example on which machine does > > the stacked-on-top-of address run(ie 192.168.42.1) ? > IP should be managed by heartbeat/pacemaker. it needs to be present > before you promote the "upper" resource to Primary. > > In my case my third > > node is not on the same ip segment as my two other nodes. > no matter. So in the "Creating a three-node setup" the ip would only ever be assigned to resource r0 nodes(alice or bob). Correct ? > > - After doing some searching I hit on the http://drbd-plus.linbit.com > > page which mentions configuraion keywords "ignore-on" and "use-csums". > > Neither of these exist in the drbd.conf man page. Are they needed ? > solved differently. > ignore-on was not flexible enough, so it was dropped. > use-csums has been replaced with csums-alg (so you can chose the > algorithm to be used for the checksum based resync). okay > > - The manual talks about the drbdupper resource used in R1 style > > clusters. What about CRM style clusters ? > "interessting" setups with "interessting" constraints. > or use drbdupper resource anyways. > We probably need a blog post or other feature about this. That would be great. Any examples ? > > - In the R1 style configuraion you state : > > "The third node, which is set aside from the Heartbeat cluster, will > > have the other half of the stacked resource available permanently." > > I presume by this you mean that if the two-node cluster disappears that > > the mounting/application startup on the backup node is done manually ? > more or less, yes. > > Other Questions : > > - Is the manual available for download/printing ? > No. We hand it out in training sessions, though. Vienna sounds good ... now if I could convince my boss ... > > - Has anyone used the nx_lsa(Linx Sockets Acceration) driver to run drbd ? > I'm not exactly sure what that is supposed to do. See http://www.netxen.com/technology/pdfs/Netxen_LinuxSocketsAcc_r3.pdf Essentially it implements a socket-level offload of the network subsystem to a TCP stack running in firmware on the NIC. By using the nxoffload facility you can specify tcp ip, ports or applications to offload. > > Background : > > 1. Current two-node production clusters : > > - HW : - Proliant DL380G5 > > - Crossover for drbd : HP NC510C(NetXen) 10GB using nx_nic > > - SW : - RHEL5 and kernel-PAE-2.6.18-92.1.10.el5 > > - drbd : drbd-8.2.6-3, drbd-km-2.6.18_92.1.10.el5PAE-8.2.6-3, > > - heartbeat/pacemaker : > > heartbeat-2.99.0-3.1 > > heartbeat-common-2.99.0-3.1 > > heartbeat-resources-2.99.0-3.1 > > pacemaker-heartbeat-0.6.6-17.2 > > pacemaker-pygui-1.4-5.1 > > > > 1. Test two-node cluster : > > - HW : - Proliant DL380G4 > > - SW : - Latest RHEL5 and kernel-2.6.18-128.1.1.el5 > > - drbd : drbd-8.3.0-3, drbd-km-2.6.18_128.1.1.el5-8.3.0-3 > > - heartbeat/pacemaker : > > heartbeat-2.99.2-6.1.i386.rpm > > heartbeat-common-2.99.2-6.1.i386.rpm > > heartbeat-resources-2.99.2-6.1.i386.rpm > > pacemaker-1.0.1-3.1.i386.rpm > > pacemaker-pygui-1.4-11.9.i386.rpm > > > > -- > : Lars Ellenberg -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20090218/19f1a0d0/attachment.htm>