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
Using Datastore Clusters to
Manage Storage Resources 14
After you create a datastore cluster, you can customize it and use it to manage storage I/O and space
utilization resources.
This chapter includes the following topics:
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Using Storage DRS Maintenance Mode
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Applying Storage DRS Recommendations
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Change Storage DRS Automation Level for a Virtual Machine
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Set Up Off-Hours Scheduling for Storage DRS
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Storage DRS Anti-Affinity Rules
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Clear Storage DRS Statistics
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Storage vMotion Compatibility with Datastore Clusters
Using Storage DRS Maintenance Mode
You place a datastore in maintenance mode when you need to take it out of use to service it. A datastore
enters or leaves maintenance mode only as the result of a user request.
Maintenance mode is available to datastores within a Storage DRS-enabled datastore cluster. Standalone
datastores cannot be placed in maintenance mode.
Virtual disks that are located on a datastore that is entering maintenance mode must be migrated to
another datastore, either manually or using Storage DRS. When you attempt to put a datastore in
maintenance mode, the Placement Recommendations tab displays a list of migration
recommendations, datastores within the same datastore cluster where virtual disks can be migrated. On
the Faults tab, vCenter Server displays a list of the disks that cannot be migrated and the reasons why. If
Storage DRS affinity or anti-affinity rules prevent disks from being migrated, you can choose to enable the
Ignore Affinity Rules for Maintenance option.
The datastore is in a state of Entering Maintenance Mode until all virtual disks have been migrated.
Place a Datastore in Maintenance Mode
If you need to take a datastore out of service, you can place the datastore in Storage DRS maintenance
mode.
VMware, Inc.
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