Brian Long wrote: >Hello, > >While playing with Oracle 10gR2 RAC on OCFS2, we decided to run some >iozone benchmarks on a single node OCFS2 v. ext3 on the same LUNs. ext3 >outperforms OCFS2 by 12 - 27% in the tests. > >
You need to go into a bit more detail there. What's the problem: random reads? random writes? sequential writes? As long as my latency times for log sync writes don't get out of hand, I can live with even a frightening degredation in datafile read/write performance. With a magnified SGA, I don't plan on doing enough random IO to worry about random IO performance. My datafile IO drops dramatically when I add nodes to my cluster. >While we have not tested Oracle benchmarks like Swingbench on the two >filesystems yet, we are worried OCFS2 is going to cause an immediate >performance hit. > > Why not just test the app? I can do wicked things to the cluster interconnect that bear no resemblance to what actually happens in our app. >When running iozone to the shared OCFS2 on two nodes, performances gets >even worse. This doesn't bode well for running RAC on multiple nodes >and actually increasing performance vs. a single node on ext3. > >Any comments on how we can ensure performance of RAC will scale as >needed on OCFS2? > >/Brian/ > > _______________________________________________ Ocfs2-users mailing list [email protected] http://oss.oracle.com/mailman/listinfo/ocfs2-users
