Pivot3 X5-6500 - Appendix C Configuring Pivot3 for IPv4; Pivot3 vCenter Plugin

Setup & User Guide
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DOC-246-GDE-Pivot3 Acuity 2.3 Setup & User Guide-v1.0.docx
Service Levels – Best Practices & Behavior
Service levels are a way to categorize the priority of applications. There are three service levels defined for Acuity and N5
volumes. Policies are assigned to the Mission Critical, Business Critical, and Non-Critical service levels in order of
performance priority.
Volumes assigned to the different service levels will have different behavior based on the current load and state of the
Acuity and N5 platforms. The enforcement of the performance policy targets is based on how the system responds in
different situations. Service levels guarantee performance to each application by isolating workloads from one another.
Service
Level
Steady-state Behavior Degraded Behavior
Mission
Critical
• Volumes in the Mission Critical service
level receive the highest priority in the
system.
• If there is contention for performance
resources in the system, Mission Critical
volumes will receive a higher priority
for I/O processing.
• Performance of Non-Critical and then
Business Critical volumes may be
impacted to meet the Mission Critical
service level.
• If there are available resources in the
system, Mission Critical volumes may
spike above the service level targets.
•
If the system is in a degraded state,
performance of Non-Critical and then
Business Critical volumes may be
impacted to meet the Mission Critical
service level.