Altinity · zvonand · Dec 9, 2025 · Nov 24, 2025 · Nov 24, 2025 · Dec 8, 2025
diff --git a/docs/en/antalya/swarm.md b/docs/en/antalya/swarm.md
@@ -0,0 +1,73 @@
+# Antalya branch
+
+## Swarm
+
+### Difference with upstream version
+
+#### `storage_type` argument in object storage functions
+
+In upstream ClickHouse, there are several table functions to read Iceberg tables from different storage backends such as `icebergLocal`, `icebergS3`, `icebergAzure`, `icebergHDFS`, cluster variants, the `iceberg` function as a synonym for `icebergS3`, and table engines like `IcebergLocal`, `IcebergS3`, `IcebergAzure`, `IcebergHDFS`.
+
+In the Antalya branch, the `iceberg` table function and the `Iceberg` table engine unify all variants into one by using a new named argument, `storage_type`, which can be one of `local`, `s3`, `azure`, or `hdfs`.
+
+Old syntax examples:
+
+```sql
+SELECT * FROM icebergS3('http://minio1:9000/root/table_data', 'minio', 'minio123', 'Parquet');
+SELECT * FROM icebergAzureCluster('mycluster', 'http://azurite1:30000/devstoreaccount1', 'cont', '/table_data', 'devstoreaccount1', 'Eby8vdM02xNOcqFlqUwJPLlmEtlCDXJ1OUzFT50uSRZ6IFsuFq2UVErCz4I6tq/K1SZFPTOtr/KBHBeksoGMGw==', 'Parquet');
+CREATE TABLE mytable ENGINE=IcebergHDFS('/table_data', 'Parquet');
+```
+
+New syntax examples:
+
+```sql
+SELECT * FROM iceberg(storage_type='s3', 'http://minio1:9000/root/table_data', 'minio', 'minio123', 'Parquet');
+SELECT * FROM icebergCluster('mycluster', storage_type='azure', 'http://azurite1:30000/devstoreaccount1', 'cont', '/table_data', 'devstoreaccount1', 'Eby8vdM02xNOcqFlqUwJPLlmEtlCDXJ1OUzFT50uSRZ6IFsuFq2UVErCz4I6tq/K1SZFPTOtr/KBHBeksoGMGw==', 'Parquet');
+CREATE TABLE mytable ENGINE=Iceberg('/table_data', 'Parquet', storage_type='hdfs');
+```
+
+Also, if a named collection is used to store access parameters, the field `storage_type` can be included in the same named collection:
+
+```xml
+<named_collections>
+    <s3>
+        <url>http://minio1:9001/root/</url>
+        <access_key_id>minio</access_key_id>
+        <secret_access_key>minio123</secret_access_key>
+        <storage_type>s3</storage_type>
+    </s3>
+</named_collections>
+```
+
+```sql
+SELECT * FROM iceberg(s3, filename='table_data');
+```
+
+By default `storage_type` is `'s3'` to maintain backward compatibility.
+
+
+#### `object_storage_cluster` setting
+
+The new setting `object_storage_cluster` controls whether a single-node or cluster variant of table functions reading from object storage (e.g., `s3`, `azure`, `iceberg`, and their cluster variants like `s3Cluster`, `azureCluster`, `icebergCluster`) is used.
+
+Old syntax examples:
+
+```sql
+SELECT * from s3Cluster('myCluster', 'http://minio1:9001/root/data/{clickhouse,database}/*', 'minio', 'minio123', 'CSV',
+        'name String, value UInt32, polygon Array(Array(Tuple(Float64, Float64)))');
+SELECT * FROM icebergAzureCluster('mycluster', 'http://azurite1:30000/devstoreaccount1', 'cont', '/table_data', 'devstoreaccount1', 'Eby8vdM02xNOcqFlqUwJPLlmEtlCDXJ1OUzFT50uSRZ6IFsuFq2UVErCz4I6tq/K1SZFPTOtr/KBHBeksoGMGw==', 'Parquet');
+```
+
+New syntax examples:
+
+```sql
+SELECT * from s3('http://minio1:9001/root/data/{clickhouse,database}/*', 'minio', 'minio123', 'CSV',
+        'name String, value UInt32, polygon Array(Array(Tuple(Float64, Float64)))')
+        SETTINGS object_storage_cluster='myCluster';
+SELECT * FROM icebergAzure('http://azurite1:30000/devstoreaccount1', 'cont', '/table_data', 'devstoreaccount1', 'Eby8vdM02xNOcqFlqUwJPLlmEtlCDXJ1OUzFT50uSRZ6IFsuFq2UVErCz4I6tq/K1SZFPTOtr/KBHBeksoGMGw==', 'Parquet')
+        SETTINGS object_storage_cluster='myCluster';
+```
+
+This setting also applies to table engines and can be used with tables managed by Iceberg Catalog.
+
+Note: The upstream ClickHouse has introduced analogous settings, such as `parallel_replicas_for_cluster_engines` and `cluster_for_parallel_replicas`. Since version 25.10, these settings work with table engines. It is possible that in the future, the `object_storage_cluster` setting will be deprecated.
diff --git a/docs/en/engines/table-engines/integrations/iceberg.md b/docs/en/engines/table-engines/integrations/iceberg.md
@@ -296,6 +296,62 @@ CREATE TABLE example_table ENGINE = Iceberg(
 
 `Iceberg` table engine and table function support metadata cache storing the information of manifest files, manifest list and metadata json. The cache is stored in memory. This feature is controlled by setting `use_iceberg_metadata_files_cache`, which is enabled by default.
 
+## Altinity Antalya branch
+
+### Specify storage type in arguments
+
+Only in the Altinity Antalya branch does `Iceberg` table engine support all storage types. The storage type can be specified using the named argument `storage_type`. Supported values are `s3`, `azure`, `hdfs`, and `local`.
+
+```sql
+CREATE TABLE iceberg_table_s3
+    ENGINE = Iceberg(storage_type='s3', url,  [, NOSIGN | access_key_id, secret_access_key, [session_token]], format, [,compression])
+
+CREATE TABLE iceberg_table_azure
+    ENGINE = Iceberg(storage_type='azure', connection_string|storage_account_url, container_name, blobpath, [account_name, account_key, format, compression])
+
+CREATE TABLE iceberg_table_hdfs
+    ENGINE = Iceberg(storage_type='hdfs', path_to_table, [,format] [,compression_method])
+
+CREATE TABLE iceberg_table_local
+    ENGINE = Iceberg(storage_type='local', path_to_table, [,format] [,compression_method])
+```
+
+### Specify storage type in named collection
+
+Only in Altinity Antalya branch `storage_type` can be included as part of a named collection. This allows for centralized configuration of storage settings.
+
+```xml
+<clickhouse>
+    <named_collections>
+        <iceberg_conf>
+            <url>http://test.s3.amazonaws.com/clickhouse-bucket/</url>
+            <access_key_id>test<access_key_id>
+            <secret_access_key>test</secret_access_key>
+            <format>auto</format>
+            <structure>auto</structure>
+            <storage_type>s3</storage_type>
+        </iceberg_conf>
+    </named_collections>
+</clickhouse>
+```
+
+```sql
+CREATE TABLE iceberg_table ENGINE=Iceberg(iceberg_conf, filename = 'test_table')
+```
+
+The default value for `storage_type` is `s3`.
+
+### The `object_storage_cluster` setting.
+
+Only in the Altinity Antalya branch is an alternative syntax for the `Iceberg` table engine available. This syntax allows execution on a cluster when the `object_storage_cluster` setting is non-empty and contains the cluster name.
+
+```sql
+CREATE TABLE iceberg_table_s3
+    ENGINE = Iceberg(storage_type='s3', url,  [, NOSIGN | access_key_id, secret_access_key, [session_token]], format, [,compression]);
+
+SELECT * FROM iceberg_table_s3 SETTINGS object_storage_cluster='cluster_simple';
+```
+
 ## See also {#see-also}
 
 - [iceberg table function](/sql-reference/table-functions/iceberg.md)
diff --git a/docs/en/sql-reference/distribution-on-cluster.md b/docs/en/sql-reference/distribution-on-cluster.md
@@ -0,0 +1,23 @@
+# Task distribution in *Cluster family functions
+
+## Task distribution algorithm
+
+Table functions such as `s3Cluster`, `azureBlobStorageCluster`, `hdsfCluster`, `icebergCluster`, and table engines like `S3`, `Azure`, `HDFS`, `Iceberg` with the setting `object_storage_cluster` distribute tasks across all cluster nodes or a subset limited by the `object_storage_max_nodes` setting. This setting limits the number of nodes involved in processing a distributed query, randomly selecting nodes for each query.
+
+A single task corresponds to processing one source file.
+
+For each file, one cluster node is selected as the primary node using a consistent Rendezvous Hashing algorithm. This algorithm guarantees that:
+  * The same node is consistently selected as primary for each file, as long as the cluster remains unchanged.
+  * When the cluster changes (nodes added or removed), only files assigned to those affected nodes change their primary node assignment.
+
+This improves cache efficiency by minimizing data movement among nodes.
+
+## `lock_object_storage_task_distribution_ms` setting
+
+Each node begins processing files for which it is the primary node. After completing its assigned files, a node may take tasks from other nodes, either immediately or after waiting for `lock_object_storage_task_distribution_ms` milliseconds if the primary node does not request new files during that interval. The default value of `lock_object_storage_task_distribution_ms` is 500 milliseconds. This setting balances between caching efficiency and workload redistribution when nodes are imbalanced.
+
+## `SYSTEM STOP SWARM MODE` command
+
+If a node needs to shut down gracefully, the command `SYSTEM STOP SWARM MODE` prevents the node from receiving new tasks for *Cluster-family queries. The node finishes processing already assigned files before it can safely shut down without errors.
+
+Receiving new tasks can be resumed with the command `SYSTEM START SWARM MODE`.
diff --git a/docs/en/sql-reference/table-functions/azureBlobStorageCluster.md b/docs/en/sql-reference/table-functions/azureBlobStorageCluster.md
@@ -53,6 +53,20 @@ SELECT count(*) FROM azureBlobStorageCluster(
 
 See [azureBlobStorage](/sql-reference/table-functions/azureBlobStorage#using-shared-access-signatures-sas-sas-tokens) for examples.
 
+## Altinity Antalya branch
+
+### `object_storage_cluster` setting.
+
+Only in the Altinity Antalya branch, the alternative syntax for the `azureBlobStorageCluster` table function is avilable. This allows the `azureBlobStorage` function to be used with the non-empty `object_storage_cluster` setting, specifying a cluster name. This enables distributed queries over Azure Blob Storage across a ClickHouse cluster.
+
+```sql
+SELECT count(*) FROM azureBlobStorage(
+        'http://azurite1:10000/devstoreaccount1', 'testcontainer', 'test_cluster_count.csv', 'devstoreaccount1',
+        'Eby8vdM02xNOcqFlqUwJPLlmEtlCDXJ1OUzFT50uSRZ6IFsuFq2UVErCz4I6tq/K1SZFPTOtr/KBHBeksoGMGw==', 'CSV',
+        'auto', 'key UInt64')
+SETTINGS object_storage_cluster='cluster_simple'
+```
+
 ## Related {#related}
 
 - [AzureBlobStorage engine](../../engines/table-engines/integrations/azureBlobStorage.md)

diff --git a/docs/en/sql-reference/table-functions/deltalakeCluster.md b/docs/en/sql-reference/table-functions/deltalakeCluster.md
@@ -36,6 +36,17 @@ A table with the specified structure for reading data from cluster in the specif
 - `_time` — Last modified time of the file. Type: `Nullable(DateTime)`. If the time is unknown, the value is `NULL`.
 - `_etag` — The etag of the file. Type: `LowCardinality(String)`. If the etag is unknown, the value is `NULL`.
 
+## Altinity Antalya branch
+
+### `object_storage_cluster` setting.
+
+Only in the Altinity Antalya branch alternative syntax for `deltaLakeCluster` table function is available. This allows the `deltaLake` function to be used with the non-empty `object_storage_cluster` setting, specifying a cluster name. This enables distributed queries over Delta Lake Storage across a ClickHouse cluster.
+
+```sql
+SELECT count(*) FROM deltaLake(url [,aws_access_key_id, aws_secret_access_key] [,format] [,structure] [,compression])
+SETTINGS object_storage_cluster='cluster_simple'
+```
+
 ## Related {#related}
 
 - [deltaLake engine](engines/table-engines/integrations/deltalake.md)

diff --git a/docs/en/sql-reference/table-functions/hdfsCluster.md b/docs/en/sql-reference/table-functions/hdfsCluster.md
@@ -59,6 +59,18 @@ FROM hdfsCluster('cluster_simple', 'hdfs://hdfs1:9000/{some,another}_dir/*', 'TS
 If your listing of files contains number ranges with leading zeros, use the construction with braces for each digit separately or use `?`.
 :::
 
+## Altinity Antalya branch
+
+### `object_storage_cluster` setting.
+
+Only in the Altinity Antalya branch alternative syntax for `hdfsCluster` table function is available. This allows the `hdfs` function to be used with the non-empty `object_storage_cluster` setting, specifying a cluster name. This enables distributed queries over HDFS Storage across a ClickHouse cluster.
+
+```sql
+SELECT count(*)
+FROM hdfs('hdfs://hdfs1:9000/{some,another}_dir/*', 'TSV', 'name String, value UInt32')
+SETTINGS object_storage_cluster='cluster_simple'
+```
+
 ## Related {#related}
 
 - [HDFS engine](../../engines/table-engines/integrations/hdfs.md)

diff --git a/docs/en/sql-reference/table-functions/hudiCluster.md b/docs/en/sql-reference/table-functions/hudiCluster.md
@@ -42,6 +42,18 @@ A table with the specified structure for reading data from cluster in the specif
 - `_time` — Last modified time of the file. Type: `Nullable(DateTime)`. If the time is unknown, the value is `NULL`.
 - `_etag` — The etag of the file. Type: `LowCardinality(String)`. If the etag is unknown, the value is `NULL`.
 
+## Altinity Antalya branch
+
+### `object_storage_cluster` setting.
+
+Only in the Altinity Antalya branch alternative syntax for `hudiCluster` table function is available. This allows the `hudi` function to be used with the non-empty `object_storage_cluster` setting, specifying a cluster name. This enables distributed queries over Hudi Storage across a ClickHouse cluster.
+
+```sql
+SELECT *
+FROM hudi(url [,aws_access_key_id, aws_secret_access_key] [,format] [,structure] [,compression])
+SETTINGS object_storage_cluster='cluster_simple'
+```
+
 ## Related {#related}
 
 - [Hudi engine](engines/table-engines/integrations/hudi.md)

diff --git a/docs/en/sql-reference/table-functions/iceberg.md b/docs/en/sql-reference/table-functions/iceberg.md
@@ -302,6 +302,47 @@ Table function `iceberg` is an alias to `icebergS3` now.
 - `_time` — Last modified time of the file. Type: `Nullable(DateTime)`. If the time is unknown, the value is `NULL`.
 - `_etag` — The etag of the file. Type: `LowCardinality(String)`. If the etag is unknown, the value is `NULL`.
 
+## Altinity Antalya branch
+
+### Specify storage type in arguments
+
+Only in the Altinity Antalya branch does the `iceberg` table function support all storage types. The storage type can be specified using the named argument `storage_type`. Supported values are `s3`, `azure`, `hdfs`, and `local`.
+
+```sql
+iceberg(storage_type='s3', url [, NOSIGN | access_key_id, secret_access_key, [session_token]] [,format] [,compression_method])
+
+iceberg(storage_type='azure', connection_string|storage_account_url, container_name, blobpath, [,account_name], [,account_key] [,format] [,compression_method])
+
+iceberg(storage_type='hdfs', path_to_table, [,format] [,compression_method])
+
+iceberg(storage_type='local', path_to_table, [,format] [,compression_method])
+```
+
+### Specify storage type in named collection
+
+Only in the Altinity Antalya branch can storage_type be included as part of a named collection. This allows for centralized configuration of storage settings.
+
+```xml
+<clickhouse>
+    <named_collections>
+        <iceberg_conf>
+            <url>http://test.s3.amazonaws.com/clickhouse-bucket/</url>
+            <access_key_id>test<access_key_id>
+            <secret_access_key>test</secret_access_key>
+            <format>auto</format>
+            <structure>auto</structure>
+            <storage_type>s3</storage_type>
+        </iceberg_conf>
+    </named_collections>
+</clickhouse>
+```
+
+```sql
+iceberg(named_collection[, option=value [,..]])
+```
+
+The default value for `storage_type` is `s3`.
+
 ## See Also {#see-also}
 
 * [Iceberg engine](/engines/table-engines/integrations/iceberg.md)

diff --git a/docs/en/sql-reference/table-functions/icebergCluster.md b/docs/en/sql-reference/table-functions/icebergCluster.md
@@ -49,6 +49,81 @@ SELECT * FROM icebergS3Cluster('cluster_simple', 'http://test.s3.amazonaws.com/c
 - `_time` — Last modified time of the file. Type: `Nullable(DateTime)`. If the time is unknown, the value is `NULL`.
 - `_etag` — The etag of the file. Type: `LowCardinality(String)`. If the etag is unknown, the value is `NULL`.
 
+## Altinity Antalya branch
+
+### `icebergLocalCluster` table function
+
+Only in the Altinity Antalya branch, `icebergLocalCluster` designed to make distributed cluster queries when Iceberg data is stored on shared network storage mounted with a local path. The path must be identical on all replicas.
+
+```sql
+icebergLocalCluster(cluster_name, path_to_table, [,format] [,compression_method])
+```
+
+### Specify storage type in function arguments
+
+Only in the Altinity Antalya branch, the `icebergCluster` table function supports all storage backends. The storage backend can be specified using the named argument `storage_type`. Valid values include `s3`, `azure`, `hdfs`, and `local`.
+
+```sql
+icebergCluster(storage_type='s3', cluster_name, url [, NOSIGN | access_key_id, secret_access_key, [session_token]] [,format] [,compression_method])
+
+icebergCluster(storage_type='azure', cluster_name, connection_string|storage_account_url, container_name, blobpath, [,account_name], [,account_key] [,format] [,compression_method])
+
+icebergCluster(storage_type='hdfs', cluster_name, path_to_table, [,format] [,compression_method])
+
+icebergCluster(storage_type='local', cluster_name, path_to_table, [,format] [,compression_method])
+```
+
+### Specify storage type in a named collection
+
+Only in the Altinity Antalya branch, `storage_type` can be part of a named collection.
+
+```xml
+<clickhouse>
+    <named_collections>
+        <iceberg_conf>
+            <url>http://test.s3.amazonaws.com/clickhouse-bucket/</url>
+            <access_key_id>test</access_key_id>
+            <secret_access_key>test</secret_access_key>
+            <format>auto</format>
+            <structure>auto</structure>
+            <storage_type>s3</storage_type>
+        </iceberg_conf>
+    </named_collections>
+</clickhouse>
+```
+
+```sql
+icebergCluster(iceberg_conf[, option=value [,..]])
+```
+
+The default value for `storage_type` is `s3`.
+
+### `object_storage_cluster` setting.
+
+Only in the Altinity Antalya branch, an alternative syntax for `icebergCluster` table function is available. This allows the `iceberg` function to be used with the non-empty `object_storage_cluster` setting, specifying a cluster name. This enables distributed queries over Iceberg table across a ClickHouse cluster.
+
+```sql
+icebergS3(url [, NOSIGN | access_key_id, secret_access_key, [session_token]] [,format] [,compression_method]) SETTINGS object_storage_cluster='cluster_name'
+
+icebergAzure(connection_string|storage_account_url, container_name, blobpath, [,account_name], [,account_key] [,format] [,compression_method]) SETTINGS object_storage_cluster='cluster_name'
+
+icebergHDFS(path_to_table, [,format] [,compression_method]) SETTINGS object_storage_cluster='cluster_name'
+
+icebergLocal(path_to_table, [,format] [,compression_method]) SETTINGS object_storage_cluster='cluster_name'
+
+icebergS3(option=value [,..]) SETTINGS object_storage_cluster='cluster_name'
+
+iceberg(storage_type='s3', url [, NOSIGN | access_key_id, secret_access_key, [session_token]] [,format] [,compression_method]) SETTINGS object_storage_cluster='cluster_name'
+
+iceberg(storage_type='azure', connection_string|storage_account_url, container_name, blobpath, [,account_name], [,account_key] [,format] [,compression_method]) SETTINGS object_storage_cluster='cluster_name'
+
+iceberg(storage_type='hdfs', path_to_table, [,format] [,compression_method]) SETTINGS object_storage_cluster='cluster_name'
+
+iceberg(storage_type='local', path_to_table, [,format] [,compression_method]) SETTINGS object_storage_cluster='cluster_name'
+
+iceberg(iceberg_conf[, option=value [,..]]) SETTINGS object_storage_cluster='cluster_name'
+```
+
 **See Also**
 
 - [Iceberg engine](/engines/table-engines/integrations/iceberg.md)

diff --git a/docs/en/sql-reference/table-functions/s3Cluster.md b/docs/en/sql-reference/table-functions/s3Cluster.md
@@ -90,6 +90,23 @@ Users can use the same approaches as document for the s3 function [here](/sql-re
 
 For details on optimizing the performance of the s3 function see [our detailed guide](/integrations/s3/performance).
 
+## Altinity Antalya branch
+
+### `object_storage_cluster` setting.
+
+Only in the Altinity Antalya branch alternative syntax for `s3Cluster` table function is available. This allows the `s3` function to be used with the non-empty `object_storage_cluster` setting, specifying a cluster name. This enables distributed queries over S3 Storage across a ClickHouse cluster.
+
+```sql
+SELECT * FROM s3(
+    'http://minio1:9001/root/data/{clickhouse,database}/*',
+    'minio',
+    'ClickHouse_Minio_P@ssw0rd',
+    'CSV',
+    'name String, value UInt32, polygon Array(Array(Tuple(Float64, Float64)))'
+) ORDER BY (name, value, polygon)
+SETTINGS object_storage_cluster='cluster_simple'
+```
+
 ## Related {#related}
 
 - [S3 engine](../../engines/table-engines/integrations/s3.md)