What Is Dynamic Cache Partitioning?

1.	What Is Dynamic Cache Partitioning?
Answer» A QoS feature, dynamic cache partitioning allows the Administrator the means to dynamically control the cache area size, servicing a GIVEN device group I/O, by defining flexible partitions through cache memory. Dynamic Cache Partitioning divides the cache memory into multiple partitions with unique names and their device path assignments. Partition areas can be made static or dynamic in size. The dynamic partitioning PROVIDES flexibility to the amount of FLOATING memory that can be allocated with a high and low watermark. This allows memory resources to be temporarily donated to other partitions when NEEDED. The symqos command allows you to create partitions for different device groupings in addition to the default partition that all devices belong to initially. Each partition will have a target cache percentage as well as a MINIMUM and maximum percentage. In addition, you can donate unused cache to other partitions after a specified donation time.

Answer»

A QoS feature, dynamic cache partitioning allows the Administrator the means to dynamically control the cache area size, servicing a GIVEN device group I/O, by defining flexible partitions through cache memory.
Dynamic Cache Partitioning divides the cache memory into multiple partitions with unique names and their device path assignments.
Partition areas can be made static or dynamic in size. The dynamic partitioning PROVIDES flexibility to the amount of FLOATING memory that can be allocated with a high and low watermark. This allows memory resources to be temporarily donated to other partitions when NEEDED.
The symqos command allows you to create partitions for different device groupings in addition to the default partition that all devices belong to initially. Each partition will have a target cache percentage as well as a MINIMUM and maximum percentage. In addition, you can donate unused cache to other partitions after a specified donation time.

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