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<refentry id="systemd.slice">

<refentryinfo>

<title>systemd.slice</title>

<productname>systemd</productname>

<authorgroup>

<author>

<contrib>Developer</contrib>

<firstname>Lennart</firstname>

<surname>Poettering</surname>

<email>lennart@poettering.net</email>

</author>

</authorgroup>

</refentryinfo>

<refmeta>

<refentrytitle>systemd.slice</refentrytitle>

<manvolnum>5</manvolnum>

</refmeta>

<refnamediv>

<refname>systemd.slice</refname>

<refpurpose>Slice unit configuration</refpurpose>

</refnamediv>

<refsynopsisdiv>

<para><filename><replaceable>slice</replaceable>.slice</filename></para>

</refsynopsisdiv>

<refsect1>

<title>Description</title>

<para>A unit configuration file whose name ends in

<literal>.slice</literal> encodes information about a slice which

is a concept for hierarchically managing resources of a group of

processes. This management is performed by creating a node in the

Linux Control Group (cgroup) tree. Units that manage processes

(primarily scope and service units) may be assigned to a specific

slice. For each slice, certain resource limits may be set that

apply to all processes of all units contained in that

slice. Slices are organized hierarchically in a tree. The name of

the slice encodes the location in the tree. The name consists of a

dash-separated series of names, which describes the path to the

slice from the root slice. The root slice is named,

<filename>-.slice</filename>. Example:

<filename>foo-bar.slice</filename> is a slice that is located

within <filename>foo.slice</filename>, which in turn is located in

the root slice <filename>-.slice</filename>.

</para>

<para>By default, service and scope units are placed in

<filename>system.slice</filename>, virtual machines and containers

registered with

<citerefentry><refentrytitle>systemd-machined</refentrytitle><manvolnum>1</manvolnum></citerefentry>

are found in <filename>machine.slice</filename>, and user sessions

handled by

<citerefentry><refentrytitle>systemd-logind</refentrytitle><manvolnum>1</manvolnum></citerefentry>

in <filename>user.slice</filename>. See

<citerefentry><refentrytitle>systemd.special</refentrytitle><manvolnum>5</manvolnum></citerefentry>

for more information.</para>

<para>See

<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>

for the common options of all unit configuration

files. The common configuration items are configured

in the generic [Unit] and [Install] sections. The

slice specific configuration options are configured in

the [Slice] section. Currently, only generic resource control settings

as described in

<citerefentry><refentrytitle>systemd.resource-control</refentrytitle><manvolnum>5</manvolnum></citerefentry> are allowed.

</para>

<para>Unless <varname>DefaultDependencies=false</varname>

is used, slice units will implicitly have dependencies of

type <varname>Conflicts=</varname> and

<varname>Before=</varname> on

<filename>shutdown.target</filename>. These ensure

that slice units are removed prior to system

shutdown. Only slice units involved with early boot or

late system shutdown should disable this option.

</para>

</refsect1>

<refsect1>

<title>See Also</title>

<para>

<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,

<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,

<citerefentry><refentrytitle>systemd.resource-control</refentrytitle><manvolnum>5</manvolnum></citerefentry>,

<citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>,

<citerefentry><refentrytitle>systemd.scope</refentrytitle><manvolnum>5</manvolnum></citerefentry>,

<citerefentry><refentrytitle>systemd.special</refentrytitle><manvolnum>7</manvolnum></citerefentry>,

<citerefentry><refentrytitle>systemd.directives</refentrytitle><manvolnum>7</manvolnum></citerefentry>

</para>

</refsect1>

</refentry>