partition.config

The partition.config file lets you manage your cache space more efficiently by creating cache partitions of different sizes. You can further configure these partitions to store data from certain origin servers and domains in the hosting.config file. This allows you to take better advantage of caching of frequently visited sites where the content changes infrequently.


	Important The partition configuration must be the same on all nodes in a cluster.

You must stop Content Gateway before you change the cache partition size.

Format

For each partition you want to create, enter a line with the following format:

partition=<partition_number> scheme=http size=<partition_size>

Here:

<partition_number> is a number between 1 and 255 (the maximum number of partitions is 255).

<partition_size> is the amount of cache space allocated to the partition. This value can be either a percentage of the total cache space or an absolute value. The absolute value must be a multiple of 128 MB, where 128 MB is the smallest value. If you specify a percentage, the size is rounded down to the closest multiple of 128 MB. Each partition is striped across several disks to achieve parallel I/O. For example, if there are four disks, a 1 GB partition will have 256 MB on each disk (assuming each disk has enough free space available).


	Note If you do not allocate all the disk space in the cache, the extra disk space is not used. You can use the extra space later to create new partitions without deleting and clearing the existing partitions.

Examples

The following example partitions the cache evenly:

partition=1 scheme=http size=50%

partition=2 scheme=http size=50%