6.0.1
Table Of Contents
- vSphere Resource Management
- Contents
- About vSphere Resource Management
- Updated Information
- Getting Started with Resource Management
- Configuring Resource Allocation Settings
- CPU Virtualization Basics
- Administering CPU Resources
- Memory Virtualization Basics
- Administering Memory Resources
- View Graphics Information
- 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
- Index
Using Datastore Clusters to Manage
Storage Resources 13
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,” on page 97
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“Applying Storage DRS Recommendations,” on page 99
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“Change Storage DRS Automation Level for a Virtual Machine,” on page 100
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“Set Up Off-Hours Scheduling for Storage DRS,” on page 100
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“Storage DRS Anti-Affinity Rules,” on page 101
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“Clear Storage DRS Statistics,” on page 104
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“Storage vMotion Compatibility with Datastore Clusters,” on page 105
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.
Prerequisites
Storage DRS is enabled on the datastore cluster that contains the datastore that is entering maintenance
mode.
VMware, Inc.
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