Fair Share Scheduler on a System With Zones Installed

This section describes how to use the fair share scheduler (FSS) with zones.

FSS Share Division in a Global or Non-Global Zone

FSS CPU shares for a zone are hierarchical. The shares for the global and non-global zones are set by the global administrator through the zone-wide resource control zone.cpu-shares. The project.cpu-shares resource control can then be defined for each project within that zone to further subdivide the shares set through the zone-wide control.

To assign zone shares by using the zonecfg command, see How to Set zone.cpu-shares in the Global Zone. For more information on project.cpu-shares, see Available Resource Controls. Also see Using the Fair Share Scheduler on an Oracle Solaris System With Zones Installed for example procedures that show how to set shares on a temporary basis.

Share Balance Between Zones

You can use zone.cpu-shares to assign FSS shares in the global zone and in non-global zones. If FSS is the default scheduler on your system and shares are not assigned, each zone is given one share by default. If you have one non-global zone on your system and you give this zone two shares through zone.cpu-shares, that defines the proportion of CPU which the non-global zone will receive in relation to the global zone. The ratio of CPU between the two zones is 2:1.