> ## Documentation Index
> Fetch the complete documentation index at: https://clickhouse.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# azure_* session settings

> ClickHouse session settings in the azure_* generated group.

export const SettingsInfoBlock = ({type, default_value, changeable_without_restart}) => {
  return <div className="not-prose" style={{
    display: "flex",
    flexWrap: "wrap",
    alignItems: "baseline",
    columnGap: "0.5rem",
    rowGap: "0.125rem",
    margin: "0.375rem 0",
    fontSize: "0.8125rem",
    lineHeight: "1.125rem"
  }}>
      <div style={{
    fontWeight: 600,
    opacity: 0.72
  }}>Type</div>
      <div style={{
    overflowWrap: "anywhere"
  }}>{type}</div>
      <div style={{
    fontWeight: 600,
    opacity: 0.72,
    marginInlineStart: "0.5rem"
  }}>Default</div>
      <div style={{
    overflowWrap: "anywhere"
  }}>{default_value}</div>
      {changeable_without_restart && <div style={{
    fontWeight: 600,
    opacity: 0.72,
    marginInlineStart: "0.5rem"
  }}>
          Changeable without restart
        </div>}
      {changeable_without_restart && <div style={{
    overflowWrap: "anywhere"
  }}>
          {changeable_without_restart}
        </div>}
    </div>;
};

These settings are available in [system.settings](/docs/reference/system-tables/settings) and are autogenerated from [source](https://github.com/ClickHouse/ClickHouse/blob/master/src/Core/Settings.cpp).

<h2 id="azure_allow_parallel_part_upload">
  azure\_allow\_parallel\_part\_upload
</h2>

<SettingsInfoBlock type="Bool" default_value="1" />

<VersionHistory rows={[{"id": "row-1","items": [{"label": "24.4"},{"label": "true"},{"label": "Use multiple threads for azure multipart upload."}]}]} />

Use multiple threads for azure multipart upload.

<h2 id="azure_check_objects_after_upload">
  azure\_check\_objects\_after\_upload
</h2>

<SettingsInfoBlock type="Bool" default_value="0" />

<VersionHistory rows={[{"id": "row-1","items": [{"label": "24.11"},{"label": "0"},{"label": "Check each uploaded object in azure blob storage to be sure that upload was successful"}]}, {"id": "row-2","items": [{"label": "24.10"},{"label": "0"},{"label": "Check each uploaded object in azure blob storage to be sure that upload was successful"}]}]} />

Check each uploaded object in azure blob storage to be sure that upload was successful

<h2 id="azure_connect_timeout_ms">
  azure\_connect\_timeout\_ms
</h2>

<SettingsInfoBlock type="UInt64" default_value="1000" />

<VersionHistory rows={[{"id": "row-1","items": [{"label": "25.8"},{"label": "1000"},{"label": "New setting"}]}]} />

Connection timeout for host from azure disks.

<h2 id="azure_create_new_file_on_insert">
  azure\_create\_new\_file\_on\_insert
</h2>

<SettingsInfoBlock type="Bool" default_value="0" />

Enables or disables creating a new file on each insert in azure engine tables

<h2 id="azure_ignore_file_doesnt_exist">
  azure\_ignore\_file\_doesnt\_exist
</h2>

<SettingsInfoBlock type="Bool" default_value="0" />

<VersionHistory rows={[{"id": "row-1","items": [{"label": "24.6"},{"label": "0"},{"label": "Allow to return 0 rows when the requested files don't exist instead of throwing an exception in AzureBlobStorage table engine"}]}]} />

Ignore absence of file if it does not exist when reading certain keys.

Possible values:

* 1 — `SELECT` returns empty result.
* 0 — `SELECT` throws an exception.

<h2 id="azure_list_object_keys_size">
  azure\_list\_object\_keys\_size
</h2>

<SettingsInfoBlock type="UInt64" default_value="1000" />

Maximum number of files that could be returned in batch by ListObject request

<h2 id="azure_min_upload_part_size">
  azure\_min\_upload\_part\_size
</h2>

<SettingsInfoBlock type="UInt64" default_value="16777216" />

<VersionHistory rows={[{"id": "row-1","items": [{"label": "24.3"},{"label": "16777216"},{"label": "The minimum size of part to upload during multipart upload to Azure blob storage."}]}]} />

The minimum size of part to upload during multipart upload to Azure blob storage.

<h2 id="azure_request_timeout_ms">
  azure\_request\_timeout\_ms
</h2>

<SettingsInfoBlock type="UInt64" default_value="30000" />

<VersionHistory rows={[{"id": "row-1","items": [{"label": "25.8"},{"label": "30000"},{"label": "New setting"}]}]} />

Idleness timeout for sending and receiving data to/from azure. Fail if a single TCP read or write call blocks for this long.

<h2 id="azure_skip_empty_files">
  azure\_skip\_empty\_files
</h2>

<SettingsInfoBlock type="Bool" default_value="0" />

<VersionHistory rows={[{"id": "row-1","items": [{"label": "24.6"},{"label": "0"},{"label": "Allow to skip empty files in azure table engine"}]}]} />

Enables or disables skipping empty files in S3 engine.

Possible values:

* 0 — `SELECT` throws an exception if empty file is not compatible with requested format.
* 1 — `SELECT` returns empty result for empty file.

<h2 id="azure_strict_upload_part_size">
  azure\_strict\_upload\_part\_size
</h2>

<SettingsInfoBlock type="UInt64" default_value="0" />

<VersionHistory rows={[{"id": "row-1","items": [{"label": "24.3"},{"label": "0"},{"label": "The exact size of part to upload during multipart upload to Azure blob storage."}]}]} />

The exact size of part to upload during multipart upload to Azure blob storage.

<h2 id="azure_throw_on_zero_files_match">
  azure\_throw\_on\_zero\_files\_match
</h2>

<SettingsInfoBlock type="Bool" default_value="0" />

<VersionHistory rows={[{"id": "row-1","items": [{"label": "24.6"},{"label": "0"},{"label": "Allow to throw an error when ListObjects request cannot match any files in AzureBlobStorage engine instead of empty query result"}]}]} />

Throw an error if matched zero files according to glob expansion rules.

Possible values:

* 1 — `SELECT` throws an exception.
* 0 — `SELECT` returns empty result.

<h2 id="azure_truncate_on_insert">
  azure\_truncate\_on\_insert
</h2>

<SettingsInfoBlock type="Bool" default_value="0" />

Enables or disables truncate before insert in azure engine tables.

<h2 id="azure_use_adaptive_timeouts">
  azure\_use\_adaptive\_timeouts
</h2>

<SettingsInfoBlock type="Bool" default_value="1" />

<VersionHistory rows={[{"id": "row-1","items": [{"label": "25.8"},{"label": "1"},{"label": "New setting"}]}]} />

When set to `true` than for all azure requests first two attempts are made with low send and receive timeouts.
When set to `false` than all attempts are made with identical timeouts.