# Data Object - VsanUpgradeSystemUpgradeHistoryItem(vim.VsanUpgradeSystem.UpgradeHistoryItem)

Property of
  VsanUpgradeSystemUpgradeStatus
Extended by
  VsanUpgradeSystemUpgradeHistoryDiskGroupOp, VsanUpgradeSystemUpgradeHistoryPreflightFail
Extends
  DynamicData
See also
  HostSystem, Task
Since
  vSphere API 6.0

## Data Object Description

Captures one "log entry" of an upgrade process.

Properties

Name | Type | Description
--- | --- | ---
host* | ManagedObjectReference to a HostSystem | The host a history item pertains to. May be unset when item related to no particular host.
message | xsd:string | Description of the history item.
task* | ManagedObjectReference to a Task | A task associated with the history item. May be unset if no task is associated.
timestamp | xsd:dateTime | Time stamp when the history is record.
Properties inherited from DynamicData
None

*Need not be set
Show WSDL type definition
<complexType xmlns="http://www.w3.org/2001/XMLSchema" xmlns:vsan="urn:vsan" name="VsanUpgradeSystemUpgradeHistoryItem"> <complexContent> <extension base="vsan:DynamicData"> <sequence> <element name="timestamp" type="xsd:dateTime"/> <element name="host" type="vsan:ManagedObjectReference" minOccurs="0"/> <element name="message" type="xsd:string"/> <element name="task" type="vsan:ManagedObjectReference" minOccurs="0"/> </sequence> </extension> </complexContent> </complexType>