Increasing cache capacity

To increase the total disk space allocated to the cache on existing disks, or to add new disks to a Content Gateway node:

Stop Content Gateway. See Starting and stopping Content Gateway on the Command Line.

Add hardware, if necessary.

Set up the raw device and modify the permissions. For example:

mknod /etc/udev/devices/raw c 162 0

chmod 600 /etc/udev/devices/raw

Identify the physical device name and note the size in bytes (used later). For example:

fdisk -l | grep "^Disk"

Disk /dev/cciss/c0d1: 146.7 GB, 146778685440 bytes

For each real disk, create a node, change the owner of the node, and map that raw node to a physical disk. Note that the final argument increments by 1 for each disk added.

To create a node:

mknod /etc/udev/devices/raw_c0d1 c 162 1

You can change the device name to the name that is returned from the fdisk -l command in step b.

To change the owner:

chown Websense /etc/udev/devices/raw_c0d1

The owner is the installation user (default is Websense). Use the device name used in the mknod statement.

To map the raw node to a physical disk:

/usr/bin/raw /etc/udev/devices/raw_c0d1 /dev/cciss/c0d1

Use the device name used in the mknod statement.

Add the same /usr/bin/raw commands to the /etc/init.d/content_gateway file to make the changes effective on reboot. For example, at line 6 add:

...

case "$1" in

'start')

/usr/bin/raw /etc/udev/devices/raw_c0d1 /dev/cciss/c0d1

Edit the storage.config file in the Content Gateway config directory (/opt/WCG/config) to increase the amount of disk space allocated to the cache on existing disks or add the new disk devices. See storage.config.

Restart Content Gateway.