[role="xpack"]
[[slm-settings]]
=== {slm-cap} settings in {es}
[subs="attributes"]
++++
<titleabbrev>{slm-cap} settings</titleabbrev>
++++

These are the settings available for configuring
<<snapshot-lifecycle-management, {slm}>> ({slm-init}).

==== Cluster-level settings

[[slm-history-index-enabled]]
`slm.history_index_enabled`::
(<<static-cluster-setting,Static>>, Boolean)
Controls whether {slm-init} records the history of actions taken as part of {slm-init} policies
to the `slm-history-*` indices. Defaults to `true`.

[[slm-retention-schedule]]
`slm.retention_schedule`::
(<<dynamic-cluster-setting,Dynamic>>, <<schedule-cron,cron scheduler value>>)
Controls when the <<slm-retention,retention task>> runs.
Can be a periodic or absolute time schedule.
Supports all values supported by the <<schedule-cron,cron scheduler>>.
Defaults to daily at 1:30am UTC: `0 30 1 * * ?`.

[[slm-retention-duration]]
`slm.retention_duration`::
(<<dynamic-cluster-setting,Dynamic>>, <<time-units,time value>>)
Limits how long {slm-init} should spend deleting old snapshots.
Defaults to one hour: `1h`.

[[repositories-url-allowed]]
// tag::repositories-url-allowed[]
`repositories.url.allowed_urls` {ess-icon}::
(<<static-cluster-setting,Static>>)
Specifies the <<snapshots-read-only-repository,read-only URL repositories>> that snapshots can be restored from.
// end::repositories-url-allowed[]