influxdata · jstirnaman · Sep 9, 2025 · Sep 8, 2025 · Sep 8, 2025 · Sep 8, 2025
@@ -1,7 +1,8 @@
 ---
 title: InfluxDB Cloud Dedicated data durability
 description: >
-  InfluxDB Cloud Dedicated replicates all time series data in the storage tier across
+  Data written to {{% product-name %}} progresses through multiple stages to ensure durability, optimized performance and storage, and efficient querying. Configuration options at each stage affect system behavior, balancing reliability and resource usage.
+  {{% product-name %}} replicates all time series data in the storage tier across
   multiple availability zones within a cloud region and automatically creates backups
   that can be used to restore data in the event of a node failure or data corruption.
 weight: 102
@@ -13,73 +14,7 @@ influxdb3/cloud-dedicated/tags: [backups, internals]
 related:
   - https://docs.aws.amazon.com/AmazonS3/latest/userguide/DataDurability.html, AWS S3 Data Durabililty
   - /influxdb3/cloud-dedicated/reference/internals/storage-engine/
+source: /shared/v3-distributed-internals-reference/durability.md
 ---
 
-{{< product-name >}} writes data to multiple Write-Ahead-Log (WAL) files on local
-storage and retains WALs until the data is persisted to Parquet files in object storage.
-Parquet data files in object storage are redundantly stored on multiple devices
-across a minimum of three availability zones in a cloud region.
-
-## Data storage
-
-In {{< product-name >}}, all measurements are stored in
-[Apache Parquet](https://parquet.apache.org/) files that represent a
-point-in-time snapshot of the data. The Parquet files are immutable and are
-never replaced nor modified. Parquet files are stored in object storage and
-referenced in the [Catalog](/influxdb3/cloud-dedicated/reference/internals/storage-engine/#catalog), which InfluxDB uses to find the appropriate Parquet files for a particular set of data.
-
-### Data deletion
-
-When data is deleted or expires (reaches the database's [retention period](/influxdb3/cloud-dedicated/reference/internals/data-retention/#database-retention-period)), InfluxDB performs the following steps:
-
-1. Marks the associated Parquet files as deleted in the catalog.
-2. Filters out data marked for deletion from all queries.
-3. Retains Parquet files marked for deletion in object storage for approximately 30 days after the youngest data in the file ages out of retention.
-
-## Data ingest
-
-When data is written to {{< product-name >}}, InfluxDB first writes the data to a
-Write-Ahead-Log (WAL) on locally attached storage on the [Ingester](/influxdb3/cloud-dedicated/reference/internals/storage-engine/#ingester) node before
-acknowledging the write request. After acknowledging the write request, the
-Ingester holds the data in memory temporarily and then writes the contents of
-the WAL to Parquet files in object storage and updates the [Catalog](/influxdb3/cloud-dedicated/reference/internals/storage-engine/#catalog) to
-reference the newly created Parquet files. If an Ingester node is gracefully shut
-down (for example, during a new software deployment), it flushes the contents of
-the WAL to the Parquet files before shutting down.
-
-## Backups
-
-{{< product-name >}} implements the following data backup strategies:
-
-- **Backup of WAL file**: The WAL file is written on locally attached storage.
-  If an ingester process fails, the new ingester simply reads the WAL file on
-  startup and continues normal operation. WAL files are maintained until their
-  contents have been written to the Parquet files in object storage.
-  For added protection, ingesters can be configured for write replication, where
-  each measurement is written to two different WAL files before acknowledging
-  the write.
-
-- **Backup of Parquet files**: Parquet files are stored in object storage where
-  they are redundantly stored on multiple devices across a minimum of three
-  availability zones in a cloud region. Parquet files associated with each
-  database are kept in object storage for the duration of database retention period
-  plus an additional time period (approximately 30 days).
-
-- **Backup of catalog**: InfluxData keeps a transaction log of all recent updates
-  to the [InfluxDB catalog](/influxdb3/cloud-dedicated/reference/internals/storage-engine/#catalog) and generates a daily backup of
-  the catalog. Backups are preserved for at least 30 days in object storage across a minimum
-  of three availability zones.
-
-## Recovery
-
-InfluxData can perform the following recovery operations:
-
-- **Recovery after ingester failure**: If an ingester fails, a new ingester is
-  started up and reads from the WAL file for the recently ingested data.
-
-- **Recovery of Parquet files**: {{< product-name >}} uses the provided object
-  storage data durability to recover Parquet files.
-
-- **Recovery of the catalog**: InfluxData can restore the [Catalog](/influxdb3/cloud-dedicated/reference/internals/storage-engine/#catalog) to
-  the most recent daily backup and then reapply any transactions
-  that occurred since the interruption.
+<!--// SOURCE - content/shared/v3-distributed-internals-reference/durability.md -->
@@ -27,7 +27,7 @@ point-in-time snapshot of the data. The Parquet files are immutable and are
 never replaced nor modified. Parquet files are stored in object storage.
 
 <span id="influxdb-catalog"></span>
-The _InfluxDB catalog_ is a relational, PostreSQL-compatible database that
+The _InfluxDB catalog_ is a relational, PostgreSQL-compatible database that
 contains references to all Parquet files in object storage and is used as an
 index to find the appropriate Parquet files for a particular set of data.
 

@@ -0,0 +1,17 @@
+---
+title: InfluxDB Clustered data durability
+description: >
+  Data written to {{% product-name %}} progresses through multiple stages to ensure durability, optimized performance and storage, and efficient querying. Configuration options at each stage affect system behavior, balancing reliability and resource usage.
+weight: 102
+menu:
+  influxdb3_clustered:
+    name: Data durability
+    parent: InfluxDB internals
+influxdb3/clustered/tags: [backups, internals]
+related:
+  - https://docs.aws.amazon.com/AmazonS3/latest/userguide/DataDurability.html, AWS S3 Data Durabililty
+  - /influxdb3/clustered/reference/internals/storage-engine/
+source: /shared/v3-distributed-internals-reference/durability.md
+---
+
+<!--// SOURCE - content/shared/v3-distributed-internals-reference/durability.md -->
@@ -0,0 +1,92 @@
+## How data flows through {{% product-name %}}
+
+When data is written to {{% product-name %}}, it progresses through multiple stages to ensure durability, optimized performance and storage, and efficient querying. Configuration options at each stage affect system behavior, balancing reliability and resource usage.
+
+{{< svg "/static/svgs/v3-storage-architecture.svg" >}}
+
+<span class="caption">Figure: Write request, response, and ingest flow for {{% product-name %}}</span>
+
+- [Data ingest](#data-ingest)
+- [Data storage](#data-storage)
+- [Data deletion](#data-deletion)
+- [Backups](#backups)
+{{% hide-in "clustered" %}}- [Recovery](#recovery){{% /hide-in %}}
+
+## Data ingest
+
+1. [Write validation and memory buffer](#write-validation-and-memory-buffer)
+2. [Write-ahead log (WAL) persistence](#write-ahead-log-wal-persistence)
+
+### Write validation and memory buffer
+
+The [Router](/influxdb3/version/reference/internals/storage-engine/#router) validates incoming data to prevent malformed or unsupported data from entering the system.
+{{% product-name %}} writes accepted data to multiple write-ahead-log (WAL) files on local
+storage on the [Ingester](/influxdb3/version/reference/internals/storage-engine/#ingester) node before acknowledging the write request.
+The Ingester holds the data in memory to ensure leading edge data is available for querying.
+
+### Write-ahead log (WAL) persistence 
+
+The Ingester persists the contents of
+the WAL to Parquet files in object storage and updates the [Catalog](/influxdb3/version/reference/internals/storage-engine/#catalog) to
+reference the newly created Parquet files.
+{{% hide-in "clustered" %}}
+Parquet data files in object storage are redundantly stored on multiple devices
+across a minimum of three availability zones in a cloud region.
+{{% /hide-in %}}
+
+If an Ingester node is gracefully shut down (for example, during a new software deployment), it flushes the contents of the WAL to the Parquet files before shutting down.
+{{% product-name %}} retains WALs until the data is persisted to Parquet files in object storage.
+
+## Data storage
+
+In {{< product-name >}}, all measurements are stored in
+[Apache Parquet](https://parquet.apache.org/) files that represent a
+point-in-time snapshot of the data. The Parquet files are immutable and are
+never replaced nor modified. Parquet files are stored in object storage and
+referenced in the [Catalog](/influxdb3/version/reference/internals/storage-engine/#catalog), which InfluxDB uses to find the appropriate Parquet files for a particular set of data.
+
+## Data deletion
+
+When data is deleted or expires (reaches the database's [retention period](/influxdb3/version/reference/internals/data-retention/#database-retention-period)), InfluxDB performs the following steps:
+
+1. Marks the associated Parquet files as deleted in the catalog.
+2. Filters out data marked for deletion from all queries.
+{{% hide-in "clustered" %}}3. Retains Parquet files marked for deletion in object storage for approximately 30 days after the youngest data in the file ages out of retention.{{% /hide-in %}}
+
+## Backups
+
+{{< product-name >}} implements the following data backup strategies:
+
+- **Backup of WAL file**: The WAL file is written on locally attached storage.
+  If an ingester process fails, the new ingester simply reads the WAL file on
+  startup and continues normal operation. WAL files are maintained until their
+  contents have been written to the Parquet files in object storage.
+  For added protection, ingesters can be configured for write replication, where
+  each measurement is written to two different WAL files before acknowledging
+  the write.
+
+- **Backup of Parquet files**: Parquet files are stored in object storage {{% hide-in "clustered" %}}where
+  they are redundantly stored on multiple devices across a minimum of three
+  availability zones in a cloud region. Parquet files associated with each
+  database are kept in object storage for the duration of database retention period
+  plus an additional time period (approximately 30 days).{{% /hide-in %}}
+
+- **Backup of catalog**: InfluxData keeps a transaction log of all recent updates
+  to the [InfluxDB catalog](/influxdb3/version/reference/internals/storage-engine/#catalog) and generates a daily backup of
+  the catalog. {{% hide-in "clustered" %}}Backups are preserved for at least 30 days in object storage across a minimum of three availability zones.{{% /hide-in %}}
+
+{{% hide-in "clustered" %}}
+## Recovery
+
+InfluxData can perform the following recovery operations:
+
+- **Recovery after ingester failure**: If an ingester fails, a new ingester is
+  started up and reads from the WAL file for the recently ingested data.
+
+- **Recovery of Parquet files**: {{< product-name >}} uses the provided object
+  storage data durability to recover Parquet files.
+
+- **Recovery of the catalog**: InfluxData can restore the [Catalog](/influxdb3/version/reference/internals/storage-engine/#catalog) to
+  the most recent daily backup and then reapply any transactions
+  that occurred since the interruption.
+{{% /hide-in %}}