Quality of Service (QoS)

The performance of a high priority server is guaranteed by configuring the performance limit of each connected server.

When the load from one application is high in a storage integrated environment and sufficient resources to process other operations cannot be secured, performance may be reduced.

The QoS function guarantees performance by limiting resources for applications with a low priority so that resources are secured for high priority applications.

Sixteen priority levels of bandwidth limits (maximum performance limits) can be configured on the hosts, CA ports, volumes, and LUN groups. The performance configuration patterns of the bandwidth limit can be individually changed via ETERNUS Web GUI or ETERNUS CLI.

In addition, scheduled operations (when setting a bandwidth limit for hosts, CA ports, and LUN groups) are possible by setting a duration using ETERNUS CLI.

Linking with ETERNUS SF Storage Cruiser significantly reduces the operation workload on the system administrator when applying the QoS function because performance designing and tuning are automatically performed.

A bandwidth upper limit can be set for each copy path in the remote copy session.

Even if a specific path fails, the line bandwidth can be maintained without centralizing the load to other paths.

The bandwidth limit can be specified in increments of Mbit/s.