Shared Zone State in Oracle Solaris 11.4
Since Oracle Solaris 11.4, state of Zones on the system is kept in a shared database in /var/share/zones/, meaning a single database is accessed from all boot environments (BEs). However, up until Oracle Solaris 11.3, each BE kept its own local copy in /etc/zones/index, and individual copies were never synced across BEs.
This Blog provides some history, why we moved to the shared zones state database, and what it means for administrators when updating from 11.3 to 11.4.
See at: https://blogs.oracle.com/solaris/shared-zone-state-in-oracle-solaris-114