Editing SAMBA CLUSTER PUNJAB GOVT IFMS-IWDMS PROJECT (section)

== Clustered Samba Configuration  ==
You create clustered volume groups and logical volumes on one node of the cluster only. 


To create a GFS2 file system on a logical volume, run the mkfs.gfs2 command. You run this command on one cluster node only. 

To create the file system to host the Samba share on the logical volume /dev/csmb_vg/csmb_lv, execute the following command: 


<nowiki># mkfs.gfs2 -j3 -p lock_dlm -t csmb:gfs2 /dev/csmb_vg/csmb_lv</nowiki> 


The meaning of the parameters is as follows: 

-j 

Specifies the number of journals to create in the filesystem. This example uses a cluster with two nodes, so we create one journal per node. One journal is extra for future use.


-p 

Specifies the locking protocol. lock_dlm is the locking protocol GFS2 uses for inter-node communication. 


-t 

Specifies the lock table name and is of the format cluster_name:fs_name. In our structure, the cluster name as specified in the cluster.conf file is csmb, and we use gfs2 as the name for the file system. 


The /dev/csmb_vg/csmb_lv file system will be mounted at /mnt/gfs2 on all nodes. This mount point must match the value that you specify as the location of the share directory with the path = option in the /etc/samba/smb.conf file. 


To create the file system to host the CTDB state information on the logical volume /dev/csmb_vg/ ctdb_lv, execute the following command: 


<nowiki># mkfs.gfs2 -j3 -p lock_dlm -t csmb:ctdb_state /dev/csmb_vg/ctdb_lv</nowiki> 


Note that this command specifies a different lock table name than the lock table in the example that created the filesystem on /dev/csmb_vg/csmb_lv. This distinguishes the lock table names for the different devices used for the file systems. 


In this example, the /dev/csmb_vg/ctdb_lv file system will be mounted at /mnt/ctdb on all nodes. This mount point must match the value that you specify as the location of the .ctdb.lock file with the CTDB_RECOVERY_LOCK option in the /etc/sysconfig/ctdb file.