6.7
Table Of Contents
- vSphere Resource Management
- Contents
- About vSphere Resource Management
- Getting Started with Resource Management
- Configuring Resource Allocation Settings
- CPU Virtualization Basics
- Administering CPU Resources
- Memory Virtualization Basics
- Administering Memory Resources
- Persistent Memory
- Configuring Virtual Graphics
- Managing Storage I/O Resources
- Managing Resource Pools
- Creating a DRS Cluster
- Using DRS Clusters to Manage Resources
- Creating a Datastore Cluster
- Initial Placement and Ongoing Balancing
- Storage Migration Recommendations
- Create a Datastore Cluster
- Enable and Disable Storage DRS
- Set the Automation Level for Datastore Clusters
- Setting the Aggressiveness Level for Storage DRS
- Datastore Cluster Requirements
- Adding and Removing Datastores from a Datastore Cluster
- Using Datastore Clusters to Manage Storage Resources
- Using NUMA Systems with ESXi
- Advanced Attributes
- Fault Definitions
- Virtual Machine is Pinned
- Virtual Machine not Compatible with any Host
- VM/VM DRS Rule Violated when Moving to another Host
- Host Incompatible with Virtual Machine
- Host Has Virtual Machine That Violates VM/VM DRS Rules
- Host has Insufficient Capacity for Virtual Machine
- Host in Incorrect State
- Host Has Insufficient Number of Physical CPUs for Virtual Machine
- Host has Insufficient Capacity for Each Virtual Machine CPU
- The Virtual Machine Is in vMotion
- No Active Host in Cluster
- Insufficient Resources
- Insufficient Resources to Satisfy Configured Failover Level for HA
- No Compatible Hard Affinity Host
- No Compatible Soft Affinity Host
- Soft Rule Violation Correction Disallowed
- Soft Rule Violation Correction Impact
- DRS Troubleshooting Information
- Cluster Problems
- Load Imbalance on Cluster
- Cluster is Yellow
- Cluster is Red Because of Inconsistent Resource Pool
- Cluster Is Red Because Failover Capacity Is Violated
- No Hosts are Powered Off When Total Cluster Load is Low
- Hosts Are Powered-off When Total Cluster Load Is High
- DRS Seldom or Never Performs vMotion Migrations
- Host Problems
- DRS Recommends Host Be Powered on to Increase Capacity When Total Cluster Load Is Low
- Total Cluster Load Is High
- Total Cluster Load Is Low
- DRS Does Not Evacuate a Host Requested to Enter Maintenance or Standby Mode
- DRS Does Not Move Any Virtual Machines onto a Host
- DRS Does Not Move Any Virtual Machines from a Host
- Virtual Machine Problems
- Cluster Problems
Creating a Datastore Cluster 13
A datastore cluster is a collection of datastores with shared resources and a shared management
interface. Datastore clusters are to datastores what clusters are to hosts. When you create a datastore
cluster, you can use vSphere Storage DRS to manage storage resources.
Note Datastore clusters are referred to as storage pods in the vSphere API.
When you add a datastore to a datastore cluster, the datastore's resources become part of the datastore
cluster's resources. As with clusters of hosts, you use datastore clusters to aggregate storage resources,
which enables you to support resource allocation policies at the datastore cluster level. The following
resource management capabilities are also available per datastore cluster.
Space utilization load
balancing
You can set a threshold for space use. When space use on a datastore
exceeds the threshold, Storage DRS generates recommendations or
performs Storage vMotion migrations to balance space use across the
datastore cluster.
I/O latency load
balancing
You can set an I/O latency threshold for bottleneck avoidance. When I/O
latency on a datastore exceeds the threshold, Storage DRS generates
recommendations or performs Storage vMotion migrations to help alleviate
high I/O load.
Anti-affinity rules You can create anti-affinity rules for virtual machine disks. For example, the
virtual disks of a certain virtual machine must be kept on different
datastores. By default, all virtual disks for a virtual machine are placed on
the same datastore.
This chapter includes the following topics:
n
Initial Placement and Ongoing Balancing
n
Storage Migration Recommendations
n
Create a Datastore Cluster
n
Enable and Disable Storage DRS
n
Set the Automation Level for Datastore Clusters
n
Setting the Aggressiveness Level for Storage DRS
VMware, Inc.
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