Resource Manager Settings for Managing Migrations
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Resource Manager Settings for Managing Migrations

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Article ID: 326281

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Updated On:

Products

VMware vSphere ESXi

Issue/Introduction

Symptoms:
This article provides information on how to use various resource manager settings to control the number of maximum concurrent migrations.

Environment

VMware vSphere ESXi 5.x
VMware vSphere ESXi 6.x
VMware vSphere ESXi 7.x

 

 

Resolution

Caution:

Modifying or changing these values are unsupported. These are some advance configurations, modifying them without careful performance studies could lead to adverse effect. Blindly decrease concurrent operations could lead to prolonged total migrations time, especially during maintenance mode. Blindly increase concurrent operations could lead to resource starvations for each individual operation, and potentially failure.

Types of Resources Involved in Migration
  • For compute migration (vMotion) and compute + storage migration (XvMotion), host, network, and datastore resources are involved.
  • For storage only migration (SvMotion), host and datastore resources are involved.
How Does Resource Costs Impact Max Concurrent Operations
  • Max concurrent operations is calculated by dividing max cost by per operation cost.
  • Because XvMotion is both compute and storage migration, its max concurrent operations is the minimal of (max vMotion concurrent operations, max SvMotion concurrent operations)


Host Resource

Max Costs
 
vSphere Version Config Setting Default Value
Pre vSphere 6.0 vpxd.ResourceManager.maxCostPerEsx41Host 8
vSphere 6.0 and beyond vpxd.ResourceManager.maxCostPerEsx6xHost 16
Per Operation Costs
 
Migration
Type		 vSphere
Version		 Config Setting Default
Value		 Default
Max
Concurrent
Operations
vMotion Pre
vSphere
6.0		 vpxd.ResourceManager.costPerVmotionESX41 1 8
  vSphere
6.0 and
beyond		 vpxd.ResourceManager.costPerVmotionESX6x 2 8
SvMotion Pre
vSphere
6.0		 vpxd.ResourceManager.costPerSVmotionESX41 4 2
  vSphere
6.0 and
beyond		 vpxd.ResourceManager.costPerSVmotionESX6x 8 2


Datastore Resource


Max Costs
 
vSphere Version Config Setting Default Value
Pre vSphere 6.0 vpxd.ResourceManager.maxCostPerEsx41Ds 128
vSphere 6.0 and beyond vpxd.ResourceManager.maxCostPerEsx6xDs 128
Per Operation Costs
 
Migration
Type		 vSphere
Version		 Config Setting Default
Value		 Default
Max
Concurrent
Operations
vMotion Pre
vSphere
6.0		 vpxd.ResourceManager.CostPerEsx41Vmotion 1 128
  vSphere
6.0 and
beyond		 vpxd.ResourceManager.CostPerEsx6xVmotion 1 128
SvMotion Pre
vSphere
6.0		 vpxd.ResourceManager.CostPerEsx41SVmotion 16 8
  vSphere
6.0 and
beyond		 vpxd.ResourceManager.CostPerEsx6xSVmotion 16 8

 


Network Resource

Max Costs
 
Link Speed Config Setting Default Value
1G Nic vpxd.ResourceManager.maxCostPer1GNic 4
10G Nic vpxd.ResourceManager.maxCostPer10GNic 8

Per Operation Costs
 
Migration
Type		 Link
Speed		 Config Setting Default
Value		 Default Max
Concurrent
Operations
vMotion 1G Nic vpxd.ResourceManager.networkCostPerVmotion 1 4
vMotion 10G
Nic		 vpxd.ResourceManager.networkCostPerVmotion 1 8

Where to Edit These Settings?

These settings can be edited by modifying vpxd.cfg directly or via the advanced settings of the vCenter
Server Settings in the administration view.

< config >
< vpxd >
< ResourceManager >
< costPerVmotionESX6x > new value < /costPerVmotionESX6x >
< /ResourceManager >
< /vpxd >
< /config >

Advanced settings example



Note: The full config option name is vpxd.ResourceManager.maxCostPerEsx6xDs


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