6.5.1
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
- 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
- Index
Getting Started with Resource
Management 1
To understand resource management, you must be aware of its components, its goals, and how best to
implement it in a cluster seing.
Resource allocation seings for a virtual machine (shares, reservation, and limit) are discussed, including
how to set them and how to view them. Also, admission control, the process whereby resource allocation
seings are validated against existing resources is explained.
Resource management is the allocation of resources from resource providers to resource consumers.
The need for resource management arises from the overcommitment of resources—that is, more demand
than capacity and from the fact that demand and capacity vary over time. Resource management allows you
to dynamically reallocate resources, so that you can more eciently use available capacity.
This chapter includes the following topics:
n
“Resource Types,” on page 9
n
“Resource Providers,” on page 9
n
“Resource Consumers,” on page 10
n
“Goals of Resource Management,” on page 10
Resource Types
Resources include CPU, memory, power, storage, and network resources.
N ESXi manages network bandwidth and disk resources on a per-host basis, using network trac
shaping and a proportional share mechanism, respectively.
Resource Providers
Hosts and clusters, including datastore clusters, are providers of physical resources.
For hosts, available resources are the host’s hardware specication, minus the resources used by the
virtualization software.
A cluster is a group of hosts. You can create a cluster using vSphere Web Client, and add multiple hosts to
the cluster. vCenter Server manages these hosts’ resources jointly: the cluster owns all of the CPU and
memory of all hosts. You can enable the cluster for joint load balancing or failover. See Chapter 10, “Creating
a DRS Cluster,” on page 63 for more information.
A datastore cluster is a group of datastores. Like DRS clusters, you can create a datastore cluster using the
vSphere Web Client, and add multiple datstores to the cluster. vCenter Server manages the datastore
resources jointly. You can enable Storage DRS to balance I/O load and space utilization. See Chapter 12,
“Creating a Datastore Cluster,” on page 91.
VMware, Inc.
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