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When you share physical hardware in a Dell Isilon cluster with other workloads, competition exists for the following services:
Quality of service
Quality of service (QoS) addresses physical hardware performance characteristics that can be measured, improved, and sometimes guaranteed. Characteristics that are measured for QoS include throughput rates, CPU usage, and disk capacity.
Although access zones do not provide logical QoS guarantees to these resources, you can partition the resources between access zones on a single cluster. The following table describes ways to partition resources to improve QoS:
Feature | Description |
NICs | You can assign specific NICs on specific nodes to an IP address pool that is associated with an access zone. By assigning these NICs, you can determine the nodes and interfaces that are associated with an access zone, enabling the separation of CPU, memory, and network bandwidth. |
SmartPools | Node hardware equivalence classes separate SmartPools, usually into multiple tiers of high, medium, and low performance. The data written to a SmartPool is written only to the disks in the nodes of that pool. Associating an IP address pool with only the nodes of a single SmartPool enables partitioning of disk I/O resources. |
SmartQuotas | Through SmartQuotas, you can limit disk capacity by user or group or in a directory. By applying a quota to an access zone's base directory, you can limit the disk capacity that is used in that access zone. |
In SAP HANA environments, Isilon nodes and resources are logically dedicated to SAP HANA performance. With additional workloads, Dell Technologies recommends that you add more Isilon nodes to the cluster with logically separated resources.