Setting Up a Shared QFS

This section describes how to set up a shared QFS.

How to Set Up Shared QFS

Create the mcf file.

The following example uses sqfs1 and sqfs2 as file system names.

# Equipment        Eq Eq Family Dev Additional
# Identifier       Nm Tp Set    St  Parameters
# ---------------- -- -- ------ --- ----------
#      
sqfs1                            10 ma qfs3 - shared
/dev/dsk/c2t50020F2300000C98d0s2 11 mm qfs3 -
/dev/dsk/c2t50020F2300004921d0s2 12 mm qfs3 -
/dev/dsk/c2t50020F2300000C98d0s3 13 mr qfs3 -
/dev/dsk/c2t50020F2300004921d0s3 14 mr qfs3 -
#
sqfs2                                             20 mb qfs4 - shared
/dev/dsk/c2t50020F2300000C98d0s4                  21 mm qfs4 -
/dev/osd/osd0100080020E1381F00002A00479F7D98,root 22 o1 qfs4 -
/dev/osd/osd010000144F94A14C00002A00479F4EB4,root 23 o1 qfs4 -

Note - For the ms file system type in Shared QFS, set stripe=2 either in /etc/vfstab or samfs.cmd so that metadata is distributed across all devices.

Create the hosts files.

Copy the example hosts file.

# cp -i /opt/SUNWsamfs/examples/hosts* .

Create the hosts file for each file system.

A hosts file is required for each file system. You must include a server priority for any server that will be a metadata server.

The following example is for the hosts.sqfs1 file.

#
# Host Name  Network Interface  Server Priority Unused Server
# -----------------------------------------------------------
kingkong    kingkong-priv,kingkong   1      -    server
godzilla    godzilla-priv,godzilla   2      -
nebula      nebula-priv,nebula       -      -
cosmic      cosmic-priv,cosmic       -      -

The following example is for the hosts.sqfs2 file.

#
# Host Name  Network Interface   Server Priority Unused    Server
# ---------------------------------------------------------------
walleye      walleye-priv0,walleye      1       -          server
bass         bass-priv0,bass            2       -
northern     northern-priv0,northern    -       -
muskie       muskie-priv0,muskie        -       -
mallard      mallard-priv0,mallard      -       -
wood         wood-priv0,wood            -       -
ruddy        ruddy-priv0,ruddy          -       -
mandarin     mandarin-priv0,mandarin    -       -

Create the vfstab file. The file contents should be similar to the following example.

#device  devicemountFSfsckmount    mount
#to mount to fsckpointtypepassat bootoptions
#
sqfs1     -/sqfs1samfs-noshared
sqfs2     -/sqfs2samfs-yesshared,stripe=2,bg

Create the mount points and mount the file systems.
1. Create the mount points and set file permissions on the mount points.
  Note - You must create the mount points and set appropriate permissions on all hosts that are part of the shared file system.
  
  The following example commands uses sqfs1 as the file system name.
```
# mkdir /sqfs1
# chmod 755 /sqfs1
# mkdir /sqfs2
# chmod 755 /sqfs2
```
2. Verify that SAM-QFS is correctly configured in the /etc/inet/services file.
  For example, use the tail command as shown in the following example:
```
# tail /etc/inet/services
```
  The result of the tail command shows the appropriate SAM-QFS service, similar to the following example:
```
# sam-qfs   7105/tcp# SAM-QFS
```
3. Reconfigure the sam-fsd daemon based on the new mcf file and related configuration changes.
```
# samd config
```
4. Create the shared file systems using the mount points that you defined above.
  For example:
```
# sammkfs -S sqfs1
# sammkfs -S sqfs2
```
  Tip - The -S option identifies the file system as a shared file system.
5. Mount the new file system on the metadata server.
  For example:
```
server# mount sqfs1
server# mount sqfs2
```
6. Mount the new file systems on the clients.
  For example:
```
client# mount sqfs1
client# mount sqfs2
```
7. Confirm that space has been allocated for the file systems.
```
df -1h
```
8. Run the following if the configuration changes:
```
# samd config
```

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