The Concurrent Operations Limits for vCenter Server and View Composer have changed. VMware vCenter and View Composer Advanced Settings allow administrators to specify the maximum concurrent number of provisioning, power and maintenance operations. In View 5.0 only power and provisioning concurrent operations were available for configuration via the user Interface.
VMware View 5.1 not only implement management of maintenance and Linked-Clone provisioning operations but also increase the Default limits.
NEW (View 5.1)
OLD (View 5.0)
Max concurrent vCenter provisioning operations – Determines the maximum number of concurrent requests that View Manager can make to provision and delete full virtual machines in this vCenter Server instance.
Max concurrent power operations – Determines the maximum number of concurrent power
operations (startup, shutdown, suspend, and so on) that can take place on virtual machines managed by View Manager in this vCenter Server instance.
Max concurrent View Composer maintenance operations – Determines the maximum number of concurrent View Composer refresh, recompose, and rebalance operations that can take place on linked clones managed by this View Composer instance.
Max concurrent View Composer provisioning operations – Determines the maximum number of concurrent creation and deletion operations that can take place on linked clones managed by this View Composer instance.
The Default operation limits are recommended for most VMware View implementations. However, if you have a temporal workload in your environment you may want to have the ability to execute a large number of simultaneous operations; like when employees get to their workstations in the morning, or when students finish or start a class.
Changing the Default values may impact on vCenter and VMware View performance creating a performance bottlenecks on CPU, Memory or Storage. Be careful when changing those limits, always making sure you increase them by slow amounts while ensuring the infrastructure is handling well the new workload.
For more information refer to the VMware View 5.1 Administration Guide