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Knowledge Base

Resource Manager Settings for Managing Migrations (57868)

Last Updated: 1/23/2024Categories: How toTotal Views: 642Language:
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Symptoms

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

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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