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
Managing Resource Pools 9
A resource pool is a logical abstraction for flexible management of resources. Resource pools can be grouped
into hierarchies and used to hierarchically partition available CPU and memory resources.
Each standalone host and each DRS cluster has an (invisible) root resource pool that groups the resources of
that host or cluster. The root resource pool does not appear because the resources of the host (or cluster) and
the root resource pool are always the same.
Users can create child resource pools of the root resource pool or of any user-created child resource pool.
Each child resource pool owns some of the parent’s resources and can, in turn, have a hierarchy of child
resource pools to represent successively smaller units of computational capability.
A resource pool can contain child resource pools, virtual machines, or both. You can create a hierarchy of
shared resources. The resource pools at a higher level are called parent resource pools. Resource pools and
virtual machines that are at the same level are called siblings. The cluster itself represents the root resource
pool. If you do not create child resource pools, only the root resource pools exist.
In the following example, RP-QA is the parent resource pool for RP-QA-UI. RP-Marketing and RP-QA are
siblings. The three virtual machines immediately below RP-Marketing are also siblings.
Figure 9‑1. Parents, Children, and Siblings in Resource Pool Hierarchy
root resource pool
siblings
siblings
parent resource pool
child resource pool
For each resource pool, you specify reservation, limit, shares, and whether the reservation should be
expandable. The resource pool resources are then available to child resource pools and virtual machines.
This chapter includes the following topics:
n
“Why Use Resource Pools?,” on page 56
n
“Create a Resource Pool,” on page 57
n
“Edit a Resource Pool,” on page 58
n
“Add a Virtual Machine to a Resource Pool,” on page 58
n
“Remove a Virtual Machine from a Resource Pool,” on page 59
n
“Remove a Resource Pool,” on page 60
n
“Resource Pool Admission Control,” on page 60
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