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new 509d811d5 HDDS-14290. [Website v2] [Docs] [Core Concepts] SCM High
Availability (#205)
509d811d5 is described below
commit 509d811d53c5b2dbf76525a7ca78da250a0023a4
Author: Bolin Lin <[email protected]>
AuthorDate: Tue Jan 6 00:18:28 2026 -0500
HDDS-14290. [Website v2] [Docs] [Core Concepts] SCM High Availability (#205)
---
docs/03-core-concepts/05-high-availability/01-scm-ha.md | 17 +++++++++++++++++
docs/03-core-concepts/05-high-availability/README.mdx | 11 +++++++++++
2 files changed, 28 insertions(+)
diff --git a/docs/03-core-concepts/05-high-availability/01-scm-ha.md
b/docs/03-core-concepts/05-high-availability/01-scm-ha.md
new file mode 100644
index 000000000..ccb2f601c
--- /dev/null
+++ b/docs/03-core-concepts/05-high-availability/01-scm-ha.md
@@ -0,0 +1,17 @@
+---
+sidebar_label: SCM High Availability
+---
+
+# SCM High Availability
+
+Ozone has two metadata-manager nodes (*Ozone Manager* for key space management
and *Storage Container Management* for block space management) and multiple
storage nodes (Datanode). Data is replicated between Datanodes with the help of
RAFT consensus algorithm.
+
+To avoid any single point of failure the metadata-manager nodes also should
have a HA setup.
+
+Both Ozone Manager and Storage Container Manager supports HA. In this mode the
internal state is replicated via RAFT (with Apache Ratis)
+
+<!-- TODO: Link to OM HA page when created --> Please check the OM HA
documentation for HA setup of Ozone Manager (OM). While they can be setup for
HA independently, a reliable, full HA setup requires enabling HA for both
services.
+
+## Service ID and SCM Host Mapping
+
+To select between the available SCM nodes, a logical name (a `serviceId`) is
required for each of the clusters which can be resolved to the IP addresses
(and domain names) of the Storage Container Managers. <!-- TODO: Link to SCM HA
configuration documentation when created --> Check out the SCM HA configuration
documentation for details on how to configure the service ID and map it to
individual SCM nodes.
diff --git a/docs/03-core-concepts/05-high-availability/README.mdx
b/docs/03-core-concepts/05-high-availability/README.mdx
new file mode 100644
index 000000000..46728a6e5
--- /dev/null
+++ b/docs/03-core-concepts/05-high-availability/README.mdx
@@ -0,0 +1,11 @@
+---
+sidebar_label: High Availability
+---
+
+# High Availability
+
+import DocCardList from '@theme/DocCardList';
+
+This section describes how Ozone achieves high availability for its metadata
managers to eliminate single points of failure.
+
+<DocCardList/>
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