How to configure OCFS2

What is OCFS2? Visit this web site.

1. Connect iSCSI

iscsiadm -m discovery -p [IP_OF_NAS] -t st
iscsiadm -m node -login



2. Check if iSCSI is connected correctly

fdisk -l

Success if you can see [/dev/sdX]
* X may be b, but it can be c, d or other if you have several attached HDDs.


3. Generate Cluster

/etc/ocfs2/cluster.conf

• Configure Cluster Driver : /etc/init.d/o2cb configure
• NM : Node Manager, cluster.conf - Track status of all installed nodes
• HB : Heartbeat - Notify UP/DOWN status when a node join/drop into a cluster
• TCP : Communicate inter-nodes
• DLM : Distributed Lock Manager - Track status and owner of LOCK
• CONFIGFS : Configuration File System mounted to User Space(/config)
• DLMFS : User Space Interface for Kernel Space DLM


4. Make partition

fdisk /dev/sdX

or

cfdisk /dev/sdX



5. Make filesystem(run once on a server)

mkfs -t ocfs2 /dev/sdb1



6. Mount filesystem(run on all servers)

mount -t ocfs2 -o _netdev,nointr /dev/sdb1 /mnt/ocfs2



7. Test read/write operation