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Copy file name to clipboardExpand all lines: src/current/v25.3/failover-replication.md
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key: cutover-replication.html
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Physical cluster replication is supported in CockroachDB {{ site.data.products.core }} clusters and is in [limited access]({% link {{ page.version.version }}/cockroachdb-feature-availability.md %}) on [Cockroach Cloud]({% link cockroachcloud/physical-cluster-replication.md %}).
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_Failover_ in [**physical cluster replication (PCR)**]({% link {{ page.version.version }}/physical-cluster-replication-overview.md %}) allows you to move application traffic from the active primary cluster to the passive standby cluster. When you complete the replication stream to initiate a failover, the job stops replicating data from the primary, sets the standby [virtual cluster]({% link {{ page.version.version }}/physical-cluster-replication-technical-overview.md %}) to a point in time (in the past or future) where all ingested data is consistent, and then makes the standby virtual cluster ready to accept traffic.
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After a failover event, you may want to return your operations to the original primary cluster (or a new cluster). _Failback_ in PCR does this by replicating new application traffic back onto the original primary cluster. When you initiate a failback, the job ensures the original primary is up to date with writes from the standby that happened after failover. The original primary cluster is then set as ready to accept application traffic once again.
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-[**Job management**](#job-management) after a failover or failback.
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Failover and failback do **not** redirect traffic automatically to the standby cluster. Once the failover or failback is complete, you must redirect application traffic to the standby (new) cluster.
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Failover and failback do **not** redirect traffic automatically to the standby cluster. Once the failover or failback is complete, you must redirect application traffic to the standby cluster.
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## Failover
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### Step 1. Initiate the failover
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To initiate a failover to the standby cluster, specify the point in time for the its promotion. At failover, the standby cluster’s data will reflect the state of the primary at the specified moment. Refer to the following sections for steps:
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To initiate a failover to the standby cluster, specify the point in time for its promotion. At failover, the standby cluster’s data will reflect the state of the primary at the specified moment. Refer to the following sections for steps:
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-[`LATEST`](#fail-over-to-the-most-recent-replicated-time): The most recent replicated timestamp. This minimizes any data loss from the replication lag in asynchronous replication.
Copy file name to clipboardExpand all lines: src/current/v25.3/set-up-physical-cluster-replication.md
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docs_area: manage
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Physical cluster replication is supported in CockroachDB {{ site.data.products.core }} clusters and is in [limited access]({% link {{ page.version.version }}/cockroachdb-feature-availability.md %}) on [Cockroach Cloud]({% link cockroachcloud/physical-cluster-replication.md %}).
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In this tutorial, you will set up [**physical cluster replication (PCR)**]({% link {{ page.version.version }}/physical-cluster-replication-overview.md %}) between a primary cluster and standby cluster. The primary cluster is _active_, serving application traffic. The standby cluster is _passive_, continuously receiving updates from the primary cluster. The replication stream replicates changes from the primary to the standby.
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The unit of replication is a [virtual cluster]({% link {{ page.version.version }}/cluster-virtualization-overview.md %}), which is part of the underlying infrastructure in the primary and standby clusters.
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