On Feb 18, 2008 7:33 PM, Eddie C <[EMAIL PROTECTED]> wrote: > The reason I began researching this type of replication is that we had > several applications that could not be easily clustered because they > had some persistant data such as logs and state information that was > stored locally on disk. So it seemed like the best way was to create > drbd disks, I went with the active/active disk configuration in DRBD8, > and putting OCFS2 on top of it.
If you merely need a persistent data store for each application, why not just make a DRBD resource with ext3/xfs on top for each application, and let Heartbeat colocate the each DRBD resources and application? This is basically the sort of setup we are running now. > First note that as a rule of thumb I never build custom kernels. Maybe > I am too new school, but I figure if the application does not work > with the kernel I am running now it is very bleeding edge and probably > not ready for mainstream deployment. > > I did find that OCFS2 and or DRBB 0.8 would not work with the stock > FC5 kernel. A yum update to the newest kernel got the system to the > point of running the software in memory without Dynamic Link issues. > Firstly I had to handle the drbd partitioning. This is not a big deal > but, its not 1,2,3. You can not really kickstart it well. have to > configure OCFS2, have to open firewall ports, also add a crossover > cable, put the system on two networks. > > But I did get it up and working in active/active mode. I should have > ran UnixBench on it to see the raw performance but I did not. > > Also at the time the OCF could not handle active/active drbd > configurations. I hacked together some LSB scripts for DRBD, ocfs2. > > All in all the setup time was vast. I felt that I could get better > value out of one machine well administered and backed up. the major > problem is that you had to be an HA expert, a DRBD expert, and an OCFS > expert to get anything working on the systems. > > I think the active active ocfs2 would be great for a large SAN type > disk, but it was just too much management for servers you would like > to replicate. > > > On Feb 18, 2008 11:39 AM, Atul Athavale <[EMAIL PROTECTED]> wrote: > > Hello, > > > > You may find some starting point at > > > > http://wiki.linux-ha.org/AtulAthavale > > > > or at > > > > http://www.debian-administration.org/articles/578 > > > > Regards, > > > > Atul Athavale. > > > > _______________________________________________ > > Linux-HA mailing list > > [email protected] > > http://lists.linux-ha.org/mailman/listinfo/linux-ha > > See also: http://linux-ha.org/ReportingProblems > > > _______________________________________________ > Linux-HA mailing list > [email protected] > http://lists.linux-ha.org/mailman/listinfo/linux-ha > See also: http://linux-ha.org/ReportingProblems > _______________________________________________ Linux-HA mailing list [email protected] http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
