You can set advanced attributes that affect the behavior of your VMware HA cluster.

VMware HA Advanced Attributes

Attribute

Description

das.isolationaddress[...]

Sets the address to ping to determine if a host is isolated from the network. This address is pinged only when heartbeats are not received from any other host in the cluster. If not specified, the default gateway of the management network is used. This default gateway has to be a reliable address that is available, so that the host can determine if it is isolated from the network. You can specify multiple isolation addresses (up to 10) for the cluster: das.isolationaddressX, where X = 1-10. Typically you should specify one per management network. Specifying too many addresses makes isolation detection take too long.

das.usedefaultisolationaddress

By default, VMware HA uses the default gateway of the console network as an isolation address. This attribute specifies whether or not this default is used (true|false).

das.failuredetectiontime

Changes the default failure detection time for host monitoring. The default is 15000 milliseconds (15 seconds). This is the time period, when a host has received no heartbeats from another host, that it waits before declaring that host as failed.

das.failuredetectioninterval

Changes the heartbeat interval among VMware HA hosts. By default, this occurs every 1000 milliseconds (1 second).

das.isolationshutdowntimeout

The period of time the system waits for a virtual machine to shut down before powering it off. This only applies if the host's isolation response is Shut down VM. Default value is 300 seconds.

das.slotmeminmb

Defines the maximum bound on the memory slot size. If this option is used, the slot size is the smaller of this value or the maximum memory reservation plus memory overhead of any powered-on virtual machine in the cluster.

das.slotcpuinmhz

Defines the maximum bound on the CPU slot size. If this option is used, the slot size is the smaller of this value or the maximum CPU reservation of any powered-on virtual machine in the cluster.

das.vmmemoryminmb

Defines the default memory resource value assigned to a virtual machine if its memory reservation is not specified or zero. This is used for the Host Failures Cluster Tolerates admission control policy. If no value is specified, the default is 0 MB.

das.vmcpuminmhz

Defines the default CPU resource value assigned to a virtual machine if its CPU reservation is not specified or zero. This is used for the Host Failures Cluster Tolerates admission control policy. If no value is specified, the default is 256MHz.

das.iostatsinterval

Changes the default I/O stats interval for VM Monitoring sensitivity. The default is 120 (seconds). Can be set to any value greater than, or equal to 0. Setting to 0 disables the check.

Note

If you change the value of any of the following advanced attributes, you must disable and then re-enable VMware HA before your changes take effect.

das.isolationaddress[...]

das.usedefaultisolationaddress

das.failuredetectiontime

das.failuredetectioninterval

das.isolationshutdowntimeout