# vSAN Managed Object Overview

The vSAN API centers around a small set of Managed Objects, which allow to set up and configure all aspects of vSAN, as well as query runtime state.

- VsanVcDiskManagementSystem – vSAN disks related configuration and query APIs, operating at a vSAN Cluster level in vCenter Server only
- VsanVcStretchedClusterSystem – vSAN Stretched Cluster related configuration and query APIs, operating at a vSAN Cluster level in vCenter Server only
- VsanVcClusterConfigSystem – vSAN cluster configuration setting and query APIs, operating at a vSAN Cluster level in vCenter Server only
- VsanVcClusterHealthSystem – vSAN Health related configuration and query APIs, operating at a vSAN Cluster level in vCenter Server only
- VsanPerformanceManager – vSAN Performance related configuration and query APIs, operating at both vCenter Server and ESXi host sides
- HostVsanHealthSystem – vSAN Health related configuration and query APIs, operating at a single ESXi host level
- VsanUpgradeSystemEx – vSAN upgrade and disk format convernsion related APIs, operating at a vSAN Cluster level in vCenter Server only. This MO extends the APIs of VsanUpgradeSystem
- VsanSpaceReportSystem – vSAN cluster space usage related query APIs, operating at a vSAN Cluster level in vCenter Server side only
- VsanObjectSystem – the vSAN object related status query and storage policy setting APIs, operating at both vCenter Service and ESXi host sides
- HostVsanSystem – vSAN Health related configuration and query APIs, operating at a single ESXi host level
- VsanUpgradeSystem – Used to perform and monitor vSAN on-disk format upgrades, operating at a vSAN Cluster level in vCenter Server only
- VsanIscsiTargetSystem – vSAN iSCSI target service related configuration and management APIs, operating at both vCenter Server and ESXi hosts
- VsanVcsaDeployerSystem – Virtual Center Service Appliance deployment APIs onto vSAN datastore, operating at both vCenter Server and ESXi host sides
- VsanSystemEx – vSAN system extended management APIs, operating at a single ESXi Host level
- VsanVdsSystem – vSAN system optimized VDS related operations, especially migrations from VSS to VDS
- VsanUpdateManager – VIB installation engine operating at vSAN cluster level (optimized for vSAN clusters)
- VsanCapabilitySystem – APIs to query vSAN capability, available on both vCenter and ESXi
- VsanMassCollector – vSAN system management query API's to access data and managed object properties, operating at a vSAN Cluster level in vCenter Server only
- VsanPhoneHomeSystem – vSAN online health related query API, operating at a vSAN Cluster level in vCenter Server only
- VsanVumSystem – vSAN VUM integration related API, operating at a vSAN Cluster level in vCenter Server only
- VsanResourceCheckSystem – vSAN resource check related API, operating at both vCenter Server and ESXi host sides
- CnsVolumeManager – vSAN Cloud Native Storage service related API, operating at a vSAN Cluster level in vCenter Server only
- VsanFileServiceSystem – vSAN file service related API, operating at a vSAN Cluster level in vCenter Server only
- VsanIoInsightManager – vSAN IOInsight related APIs, operating at both vCenter Server and ESXi Host sides
- VsanRemoteDatastoreSystem – vSAN remote datastore related APIs, operating at vCenter Server only
- VsanDiagnosticsSystem – vSAN diagnostics system related APIs, operating at vCenter Server only
- VsanClusterPowerSystem – vSAN cluster power system related APIs, operating at vCenter Server only

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