vSphere HA restarts VM protected by vSphere Replication or similar 3rd party service
Article ID: 379719
Updated On:
Products
VMware vSphere ESXi
Issue/Introduction
A VM crashes and is restarted by vSphere HA due to the fact there are more I/Os issued through the LWD I/O tracker than the maximum number of I/Os it was configured to handle. LWD (light weight delta) and SES (storage efficieny service) modules are leveraged by VM protection software such as vSphere Replication, Dell Recoverpoint etc.
Environment
ESXi 7.x
ESXi 8.x
Cause
The I/O pattern for the VMDK of the VM is such that there are too many COW fragments that are written to the SES and the I/O tracker limit for number of tracked I/Os seems to be under provisioned for the SES case. The current limit is 1536 but the limit should be increased to 8000.
Resolution
The issue is fixed in ESXi 8.0u3b
Feedback
Yes
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