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System Administration Guide: Oracle Solaris Containers-Resource Management and Oracle Solaris Zones     Oracle Solaris Legacy Containers
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Part I Resource Management

1.  Introduction to Solaris 10 Resource Management

2.  Projects and Tasks (Overview)

3.  Administering Projects and Tasks

4.  Extended Accounting (Overview)

5.  Administering Extended Accounting (Tasks)

6.  Resource Controls (Overview)

7.  Administering Resource Controls (Tasks)

8.  Fair Share Scheduler (Overview)

Introduction to the Scheduler

CPU Share Definition

CPU Shares and Process State

CPU Share Versus Utilization

CPU Share Examples

Example 1: Two CPU-Bound Processes in Each Project

Example 2: No Competition Between Projects

Example 3: One Project Unable to Run

FSS Configuration

Projects and Users

CPU Shares Configuration

FSS and Processor Sets

FSS and Processor Sets Examples

Combining FSS With Other Scheduling Classes

Setting the Scheduling Class for the System

Scheduling Class on a System with Zones Installed

Commands Used With FSS

9.  Administering the Fair Share Scheduler (Tasks)

10.  Physical Memory Control Using the Resource Capping Daemon (Overview)

11.  Administering the Resource Capping Daemon (Tasks)

12.  Resource Pools (Overview)

13.  Creating and Administering Resource Pools (Tasks)

14.  Resource Management Configuration Example

15.  Resource Control Functionality in the Solaris Management Console

Part II Zones

16.  Introduction to Solaris Zones

17.  Non-Global Zone Configuration (Overview)

18.  Planning and Configuring Non-Global Zones (Tasks)

19.  About Installing, Halting, Cloning, and Uninstalling Non-Global Zones (Overview)

20.  Installing, Booting, Halting, Uninstalling, and Cloning Non-Global Zones (Tasks)

21.  Non-Global Zone Login (Overview)

22.  Logging In to Non-Global Zones (Tasks)

23.  Moving and Migrating Non-Global Zones (Tasks)

24.  Oracle Solaris 10 9/10: Migrating a Physical Oracle Solaris System Into a Zone (Tasks)

25.  About Packages and Patches on an Oracle Solaris System With Zones Installed (Overview)

26.  Adding and Removing Packages and Patches on an Oracle Solaris System With Zones Installed (Tasks)

27.  Oracle Solaris Zones Administration (Overview)

28.  Oracle Solaris Zones Administration (Tasks)

29.  Upgrading an Oracle Solaris 10 System That Has Installed Non-Global Zones

30.  Troubleshooting Miscellaneous Oracle Solaris Zones Problems

Part III lx Branded Zones

31.  About Branded Zones and the Linux Branded Zone

32.  Planning the lx Branded Zone Configuration (Overview)

33.  Configuring the lx Branded Zone (Tasks)

34.  About Installing, Booting, Halting, Cloning, and Uninstalling lx Branded Zones (Overview)

35.  Installing, Booting, Halting, Uninstalling and Cloning lx Branded Zones (Tasks)

36.  Logging In to lx Branded Zones (Tasks)

37.  Moving and Migrating lx Branded Zones (Tasks)

38.  Administering and Running Applications in lx Branded Zones (Tasks)



Introduction to the Scheduler

A fundamental job of the operating system is to arbitrate which processes get access to the system's resources. The process scheduler, which is also called the dispatcher, is the portion of the kernel that controls allocation of the CPU to processes. The scheduler supports the concept of scheduling classes. Each class defines a scheduling policy that is used to schedule processes within the class. The default scheduler in the Solaris Operating System, the TS scheduler, tries to give every process relatively equal access to the available CPUs. However, you might want to specify that certain processes be given more resources than others.

You can use the fair share scheduler (FSS) to control the allocation of available CPU resources among workloads, based on their importance. This importance is expressed by the number of shares of CPU resources that you assign to each workload.

You give each project CPU shares to control the project's entitlement to CPU resources. The FSS guarantees a fair dispersion of CPU resources among projects that is based on allocated shares, independent of the number of processes that are attached to a project. The FSS achieves fairness by reducing a project's entitlement for heavy CPU usage and increasing its entitlement for light usage, in accordance with other projects.

The FSS consists of a kernel scheduling class module and class-specific versions of the dispadmin(1M) and priocntl(1) commands. Project shares used by the FSS are specified through the project.cpu-shares property in the project(4) database.

Note - If you are using the project.cpu-shares resource control on a system with zones installed, see Zone Configuration Data, Resource Controls Used in Non-Global Zones, and Using the Fair Share Scheduler on an Oracle Oracle Solaris System With Zones Installed.