> ## 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.

# write_through_distributed_cache_* 会话设置

> ClickHouse 在 write_through_distributed_cache_* 生成组中的会话设置。

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
  }}>类型</div>
      <div style={{
    overflowWrap: "anywhere"
  }}>{type}</div>
      <div style={{
    fontWeight: 600,
    opacity: 0.72,
    marginInlineStart: "0.5rem"
  }}>默认值</div>
      <div style={{
    overflowWrap: "anywhere"
  }}>{default_value}</div>
      {changeable_without_restart && <div style={{
    fontWeight: 600,
    opacity: 0.72,
    marginInlineStart: "0.5rem"
  }}>
          无需重启即可更改
        </div>}
      {changeable_without_restart && <div style={{
    overflowWrap: "anywhere"
  }}>
          {changeable_without_restart}
        </div>}
    </div>;
};

export const CloudOnlyBadge = () => {
  return <div className="cloudBadge">
            <div className="cloudIcon">
            <svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
                <path fillRule="evenodd" clipRule="evenodd" d="M5.33395 12.6667H12.3739C13.6593 12.6667 14.7073 11.6187 14.7073 10.3334C14.7073 9.04804 13.6593 8.00004 12.3739 8.00004H12.0839V7.33337C12.0839 5.12671 10.2906 3.33337 8.08395 3.33337C6.09928 3.33337 4.45395 4.78537 4.14195 6.68204C2.55728 6.76271 1.29395 8.06204 1.29395 9.66671C1.29395 11.3234 2.63728 12.6667 4.29395 12.6667H5.33395Z" stroke="currentColor" strokeWidth="1.5" strokeLinecap="round" strokeLinejoin="round" />
            </svg>
        </div>
            {'仅限 ClickHouse Cloud'}
        </div>;
};

这些设置可在 [system.settings](/docs/zh/reference/system-tables/settings) 中查看，并由 [源代码](https://github.com/ClickHouse/ClickHouse/blob/master/src/Core/Settings.cpp) 自动生成。

<div id="write_through_distributed_cache">
  ## write\_through\_distributed\_cache
</div>

<CloudOnlyBadge />

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

<VersionHistory rows={[{"id": "row-1","items": [{"label": "24.10"},{"label": "0"},{"label": "ClickHouse Cloud 的一项设置"}]}]} />

仅在 ClickHouse Cloud 中生效。允许写入分布式缓存 (写入 S3 也将由分布式缓存完成)

<div id="write_through_distributed_cache_buffer_size">
  ## write\_through\_distributed\_cache\_buffer\_size
</div>

<CloudOnlyBadge />

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

<VersionHistory rows={[{"id": "row-1","items": [{"label": "25.7"},{"label": "0"},{"label": "新增云设置"}]}]} />

仅在 ClickHouse Cloud 中生效。设置直写分布式缓存的缓冲区大小。如果为 0，则使用未启用分布式缓存时本应使用的缓冲区大小。