Partitioning and Virtualization
The M-series supports Dynamic Domains and Dynamic Reconfiguration, which enable a single machine to be divided into multiple electrically isolated partitions.
The UltraSPARC T1, UltraSPARC T2/T2+ models partition the system using Logical Domains.
Both M-series and T-series models support Solaris Containers, which supports a maximum of 8191 non-global zones in each Dynamic Domain or Logical Domain.
Read more about this topic: SPARC Enterprise