<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> <HTML> <HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"> <META NAME="Generator" CONTENT="MS Exchange Server version 5.5.2658.34"> <TITLE>GFS performance</TITLE> </HEAD> <BODY> Hello guru's, Interesting problem I am hoping someone on this forum has seen before, and can give me pointers to what may be wrong. Here is the setup: 2 HP DL380 G4 systems with RHEL4U4 1 unmanaged switch (for Cluster interconnect and Oracle RAC interconnect.) Public network for Oracle NET and normal network traffic RHCS4 using DLM locking protocol (three servers to keep GULM lock info for a two node RAC seemed pretty wasteful) GFS6.1 Oracle Clusterware (latest) Oracle Database 10gR2 Fiber-Channel shared storage Here is my issue: I have set up a two-node Oracle 10gR2 RAC system with RHCS/GFS (OCFS2 was such a disappointment), and Oracle Clusterware. Everything on the OS cluster level is good and fine. Shortly after setting up the cluster and handing it over to the DBAs to install Clusterware and Oracle RAC. They come to me saying that they have uneven performance between the nodes. (Node one does adatabase import in an hour whereas the same import on Node2 takes 10 hours) I have been doing everything I can do on my side using various tools to try to isolate the issue (protocol analysis, iostat, strace, dd to do writes from both nodes to GFS, etc.) and I have been unable to isolate the issue as performance is quite even on an OS level. The cluster configuration has been ruled out by Redhat support as an issue. (Yay for me and Redhat!) I am hoping someone here has run into issues using Oracle Clusterware on RHCS/GFS. Thanx in advance Darrell J. Frazier CAUTION: This electronic transmission may contain information protected by deliberative process or other privilege, which is protected from disclosure under the Freedom of Information Act, 5 U.S.C. § 552. The information is intended for the use of the individual or agency to which it was sent. If you are not the intended recipient, be aware that any disclosure, distribution or use of the contents of this information is prohibited. Do not release outside of DoD channels without prior authorization from the sender. The sender provides no assurance as to the integrity of the content of this electronic transmission after it has been sent and received by the intended email recipient. </BODY> </HTML>