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Chapter 9. Monitoring Red Hat Hyperconverged Infrastructure for Virtualization
9.1. Monitoring Virtual Data Optimizer (VDO)
Monitoring VDO helps in understanding when the physical storage is running out of space. Physical space in VDO needs to be monitored like thin provisioned storage. VDO devices should use thin provisioning because more logical space will be available and VDO space will be used in a more effective way. By default thin provisioning is enabled and it can be unchecked as required.
You can check available blocks, used space, and device information by clicking on View Details.
9.1.1. Monitoring VDO using the command line interface
There are several options for monitoring VDO using the command line interface.
- The
vdostatscommand -
This command displays volume statistics including available blocks, number of blocks used, device name, percentage of physical blocks saved, and percentage of physical blocks on a VDO volume. For more information on vdostats, see the manual page:
man vdostats. - The
vdo statuscommand - This command reports VDO system and volume status in YAML format.
- The
/sys/kvdo/<vdo_volume>/statisticsdirectory -
Files in this directory include volume statistics for VDO. You can read these files instead of using the
vdostatscommand.
9.1.2. Monitoring VDO using the Web Console
Events related to VDO usage are displayed under the Notifications tab. Events provide information about the physical space remaining on the VDO volume, and keep you up to date about whether more physical space is needed.
| Type | Text | Actions |
|---|---|---|
| Warn | Warning, low confirmed disk space. StorageDomainName domain has DiskSpace GB of confirmed free space. |
|
