Configuring Pools

How to Create a Static Configuration

Use the -s option to /usr/sbin/pooladm to create a static configuration file that matches the current dynamic configuration, preserving changes across reboots. Unless a different file name is specified, the default location /etc/pooladm.conf is used.

Commit your configuration using the pooladm command with the -c option. Then, use the pooladm command with the -s option to update the static configuration to match the state of the dynamic configuration.

Note - The later functionality pooladm -s is preferred over the earlier functionality poolcfg -c discover for creating a new configuration that matches the dynamic configuration.

Before You Begin

Enable pools on your system.

Become root or assume an equivalent role.
Update the static configuration file to match the current dynamic configuration.
```
# pooladm -s
```

View the contents of the configuration file in readable form.

Note that the configuration contains default elements created by the system.

# poolcfg -c info
system tester
        string  system.comment
        int     system.version 1
        boolean system.bind-default true
        int     system.poold.pid 177916

        pool pool_default
                int     pool.sys_id 0
                boolean pool.active true
                boolean pool.default true
                int     pool.importance 1
                string  pool.comment 
                pset    pset_default

        pset pset_default
                int     pset.sys_id -1
                boolean pset.default true
                uint    pset.min 1
                uint    pset.max 65536
                string  pset.units population
                uint    pset.load 10
                uint    pset.size 4
                string  pset.comment 
                boolean testnullchanged true

                cpu
                        int     cpu.sys_id 3
                        string  cpu.comment 
                        string  cpu.status on-line

                cpu
                        int     cpu.sys_id 2
                        string  cpu.comment 
                        string  cpu.status on-line

                cpu
                        int     cpu.sys_id 1
                        string  cpu.comment 
                        string  cpu.status on-line

                cpu
                        int     cpu.sys_id 0
                        string  cpu.comment 
                        string  cpu.status on-line

Commit the configuration at /etc/pooladm.conf.
```
# pooladm -c
```
(Optional) To copy the dynamic configuration to a static configuration file called /tmp/backup, type the following:
```
# pooladm -s /tmp/backup
```

How to Modify a Configuration

To enhance your configuration, create a processor set named pset_batch and a pool named pool_batch. Then join the pool and the processor set with an association.

Note that you must quote subcommand arguments that contain white space.

Become root or assume an equivalent role.

Create processor set pset_batch.

# poolcfg -c 'create pset pset_batch (uint pset.min = 2; uint pset.max = 10)'

Create pool pool_batch.
```
# poolcfg -c 'create pool pool_batch'
```

Join the pool and the processor set with an association.

# poolcfg -c 'associate pool pool_batch (pset pset_batch)'

Display the edited configuration.

# poolcfg -c info
system tester
        string  system.comment kernel state
        int     system.version 1
        boolean system.bind-default true
        int     system.poold.pid 177916

        pool pool_default
                int     pool.sys_id 0
                boolean pool.active true
                boolean pool.default true
                int     pool.importance 1
                string  pool.comment 
                pset    pset_default

        pset pset_default
                int     pset.sys_id -1
                boolean pset.default true
                uint    pset.min 1
                uint    pset.max 65536
                string  pset.units population
                uint    pset.load 10
                uint    pset.size 4
                string  pset.comment 
                boolean testnullchanged true

                cpu
                        int     cpu.sys_id 3
                        string  cpu.comment 
                        string  cpu.status on-line

                cpu
                        int     cpu.sys_id 2
                        string  cpu.comment 
                        string  cpu.status on-line

                cpu
                        int     cpu.sys_id 1
                        string  cpu.comment 
                        string  cpu.status on-line

                cpu
                        int     cpu.sys_id 0
                        string  cpu.comment 
                        string  cpu.status on-line

        pool pool_batch
                boolean pool.default false
                boolean pool.active true
                int pool.importance 1
                string pool.comment
                pset pset_batch

        pset pset_batch
                int pset.sys_id -2
                string pset.units population
                boolean pset.default true
                uint pset.max 10
                uint pset.min 2
                string pset.comment
                boolean pset.escapable false
                uint pset.load 0
                uint pset.size 0

                cpu
                        int     cpu.sys_id 5
                        string  cpu.comment
                        string  cpu.status on-line

                cpu
                        int     cpu.sys_id 4
                        string  cpu.comment
                        string  cpu.status on-line

Commit the configuration at /etc/pooladm.conf.
```
# pooladm -c
```
(Optional) To copy the dynamic configuration to a static configuration file named /tmp/backup, type the following:
```
# pooladm -s /tmp/backup
```

How to Associate a Pool With a Scheduling Class

You can associate a pool with a scheduling class so that all processes bound to the pool use this scheduler. To do this, set the pool.scheduler property to the name of the scheduler. This example associates the pool pool_batch with the fair share scheduler (FSS).

Become root or assume an equivalent role.

Modify pool pool_batch to be associated with the FSS.

# poolcfg -c 'modify pool pool_batch (string pool.scheduler="FSS")'

Display the edited configuration.

# poolcfg -c info
system tester
        string  system.comment
        int     system.version 1
        boolean system.bind-default true
        int     system.poold.pid 177916

        pool pool_default
                int     pool.sys_id 0
                boolean pool.active true
                boolean pool.default true
                int     pool.importance 1
                string  pool.comment 
                pset    pset_default

        pset pset_default
                int     pset.sys_id -1
                boolean pset.default true
                uint    pset.min 1
                uint    pset.max 65536
                string  pset.units population
                uint    pset.load 10
                uint    pset.size 4
                string  pset.comment 
                boolean testnullchanged true

                cpu
                        int     cpu.sys_id 3
                        string  cpu.comment 
                        string  cpu.status on-line

                cpu
                        int     cpu.sys_id 2
                        string  cpu.comment 
                        string  cpu.status on-line

                cpu
                        int     cpu.sys_id 1
                        string  cpu.comment 
                        string  cpu.status on-line

                cpu
                        int     cpu.sys_id 0
                        string  cpu.comment 
                        string  cpu.status on-line

        pool pool_batch
                boolean pool.default false
                boolean pool.active true
                int pool.importance 1
                string pool.comment
                string pool.scheduler FSS
                pset batch

        pset pset_batch
                int pset.sys_id -2
                string pset.units population
                boolean pset.default true
                uint pset.max 10
                uint pset.min 2
                string pset.comment
                boolean pset.escapable false
                uint pset.load 0
                uint pset.size 0

                cpu
                        int     cpu.sys_id 5
                        string  cpu.comment
                        string  cpu.status on-line

                cpu
                        int     cpu.sys_id 4
                        string  cpu.comment
                        string  cpu.status on-line

Commit the configuration at /etc/pooladm.conf:
```
# pooladm -c
```
(Optional) To copy the dynamic configuration to a static configuration file called /tmp/backup, type the following:
```
# pooladm -s /tmp/backup
```

How to Set Configuration Constraints

Constraints affect the range of possible configurations by eliminating some of the potential changes that could be made to a configuration. This procedure shows how to set the cpu.pinned property.

In the following examples, cpuid is an integer.

Become root or assume an equivalent role.
Modify the cpu.pinned property in the static or dynamic configuration:
- Modify the boot-time (static) configuration:
```
# poolcfg -c 'modify cpu <cpuid> (boolean cpu.pinned = true)'
```
- Modify the running (dynamic) configuration without modifying the boot-time configuration:
```
# poolcfg -dc 'modify cpu <cpuid> (boolean cpu.pinned = true)'
```

How to Define Configuration Objectives

You can specify objectives for poold to consider when taking corrective action.

In the following procedure, the wt-load objective is being set so that poold tries to match resource allocation to resource utilization. The locality objective is disabled to assist in achieving this configuration goal.

Become root or assume an equivalent role.

Modify system tester to favor the wt-load objective.

# poolcfg -c 'modify system tester (string system.poold.objectives="wt-load")'

Disable the locality objective for the default processor set.

# poolcfg -c 'modify pset pset_default (string pset.poold.objectives="locality none")'one line

Disable the locality objective for the pset_batch processor set.

# poolcfg -c 'modify pset pset_batch (string pset.poold.objectives="locality none")'one line

Display the edited configuration.

# poolcfg -c info
system tester
        string  system.comment
        int     system.version 1
        boolean system.bind-default true
        int     system.poold.pid 177916
        string  system.poold.objectives wt-load

        pool pool_default
                int     pool.sys_id 0
                boolean pool.active true
                boolean pool.default true
                int     pool.importance 1
                string  pool.comment 
                pset    pset_default

        pset pset_default
                int     pset.sys_id -1
                boolean pset.default true
                uint    pset.min 1
                uint    pset.max 65536
                string  pset.units population
                uint    pset.load 10
                uint    pset.size 4
                string  pset.comment 
                boolean testnullchanged true
                string  pset.poold.objectives locality none

                cpu
                        int     cpu.sys_id 3
                        string  cpu.comment 
                        string  cpu.status on-line

                cpu
                        int     cpu.sys_id 2
                        string  cpu.comment 
                        string  cpu.status on-line

                cpu
                        int     cpu.sys_id 1
                        string  cpu.comment 
                        string  cpu.status on-line

                cpu
                        int     cpu.sys_id 0
                        string  cpu.comment 
                        string  cpu.status on-line

        pool pool_batch
                boolean pool.default false
                boolean pool.active true
                int pool.importance 1
                string pool.comment
                string pool.scheduler FSS
                pset batch

        pset pset_batch
                int pset.sys_id -2
                string pset.units population
                boolean pset.default true
                uint pset.max 10
                uint pset.min 2
                string pset.comment
                boolean pset.escapable false
                uint pset.load 0
                uint pset.size 0
                string  pset.poold.objectives locality none

                cpu
                        int     cpu.sys_id 5
                        string  cpu.comment
                        string  cpu.status on-line

                cpu
                        int     cpu.sys_id 4
                        string  cpu.comment
                        string  cpu.status on-line

Commit the configuration at /etc/pooladm.conf.
```
# pooladm -c
```
(Optional) To copy the dynamic configuration to a static configuration file called /tmp/backup, type the following:
```
# pooladm -s /tmp/backup
```

How to Set the `poold` Logging Level

To specify the level of logging information that poold generates, set the system.poold.log-level property in the poold configuration. The poold configuration is held in the libpool configuration. For information, see poold Logging Information and the poolcfg(1M) and libpool(3LIB) man pages.

You can also use the poold command at the command line to specify the level of logging information that poold generates.

Become root or assume an equivalent role.
Set the logging level by using the poold command with the -l option and a parameter, for example, INFO.
```
# /usr/lib/pool/poold -l INFO
```
For information about available parameters, see poold Logging Information. The default logging level is NOTICE.

How to Use Command Files With `poolcfg`

The poolcfg command with the -f option can take input from a text file that contains poolcfg subcommand arguments to the -c option. This method is appropriate when you want a set of operations to be performed. When processing multiple commands, the configuration is only updated if all of the commands succeed. For large or complex configurations, this technique can be more useful than per-subcommand invocations.

Note that in command files, the # character acts as a comment mark for the rest of the line.

Create the input file poolcmds.txt.

$ cat > poolcmds.txt
create system tester
create pset pset_batch (uint pset.min = 2; uint pset.max = 10)
create pool pool_batch
associate pool pool_batch (pset pset_batch)

Become root or assume an equivalent role.
Execute the command:
```
# /usr/sbin/poolcfg -f poolcmds.txt
```

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