3.1. Use Cases

Parallel domain builds

When many domains need to be created and built, many domain builders compete for the same pools of memory, which can lead to inefficient NUMA placement of guest physical memory and thus suboptimal performance for the domains.

NUMA-aware claims can help solve this problem and ensure that memory is available on the appropriate NUMA nodes.

Domain builds

The process of constructing and configuring domains by domain builders, which includes installing claims, populating memory, and setting up other resources before the domains are started. When multiple domain builders can run in parallel, this is referred to as parallel domain builds, which can benefit from NUMA-aware claims because the domain builders are competing for the same pools of memory on the NUMA nodes.

Boot storms

It is common for many domains to be booted at the same time, such as during system startup or when large numbers of domains need to be started.

Parallel migrations

Similar to boot storms, except that the domains are being migrated instead of booted, which can happen when other hosts are being drained for maintenance (host evacuation) or when workloads are being rebalanced across hosts.