On Tue, 2007-01-09 at 17:11 -0600, Brad Filipek wrote: > I have two boxes with RHEL4U4 and one application. Should the app be > installed locally on both nodes, and have the data on the SAN? Or > should the app and the data both be on the SAN? This will be an > active/passive config. That's a matter of "what works better for you". Either one works. For Oracle 10g, I installed everything on to the SAN. For something like Apache, you could make a new httpd.conf that points the docroot to the SAN mount point (since httpd was already installed on both nodes anyway). > Also, does the app and data both need to sit on a GFS? Not at all. You can use a non-cluster FS if you want (e.g. ext3). Remember that the service only runs on one node at a time; the file system is only mounted in one place at a time, etc. The key is that the file system may only be mounted in one place at a time. RHCS is designed to manage this, but you have to manually mount all this stuff up and bring up the service IP address during configuration / installation yourself. Basically: (a) partition disks (b) set up clvm (if you're going to use LVM in the cluster) (c) mkfs -t ext3 /dev/foo1 (d) mkdir /cluster/service0 (e) mount -t ext3 /dev/foo1 /cluster/service0 (f) ip addr add 192.168.1.2 dev eth0 (g) Install app. Make it use 192.168.1.2 for all traffic, and /cluster/service0 for data. (h) Start app; give it a test from your clients. (g) Stop app. (h) ip addr del 192.168.1.2 dev eth0 (j) umount /cluster/service0 (k) [configure RHCS service] -- Lon
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