# Scheduling refresh for datasets

Scheduling a refresh keeps your dataset current without manual updates. It ensures your data—and any linked dashboards or business views—stay accurate, aligned, and ready for decisions in real time.

1. Under **Data → Prepare → Schedule**, you can find the following window for scheduling the refresh of the selected dataset.

<figure><img src="https://content.gitbook.com/content/z4Tm2IzKyAiWUWiskgq5/blobs/cRQtTxkp7kLMaehR2TmM/image.png" alt="" width="563"><figcaption><p>Scheduling refresh for file-based dataset</p></figcaption></figure>

* **Refresh Mode**: **R**eplaces existing data with new data. Overwrites the old dataset.
* **Linked Datasets**: If enabled, refreshing this dataset also refreshes any child or derived datasets that depend on it.

{% hint style="info" %}
Large parallel refreshes can overload the system, so recommended practice is refreshing key datasets individually or in a controlled manner.

**“Linked datasets”** can auto-refresh if the parent dataset changes, but this is often turned off by default to avoid a chain reaction of massive refreshes.
{% endhint %}

* **Refresh all BVs with Dataset refresh**: If enabled, any Business View built on this dataset gets refreshed automatically.
* **Drag & Drop a File**: For file-based datasets (CSV, XLSX, etc.) you can upload a new version in the same schema to refresh content (limit up to 2GB). Click on **Upload** to manually trigger an upload process for the replacement data.
* **Schedule refresh:** For other datasets, you can perform an instant refresh, schedule a one-time or periodic refresh. For more details, check out [this](https://help.tellius.com/tellius-5.4/data/refreshing-a-datasource) page.

<figure><img src="https://content.gitbook.com/content/z4Tm2IzKyAiWUWiskgq5/blobs/Md4RdqQCUvF3T150at7o/image.png" alt="" width="563"><figcaption><p>Schedule refresh</p></figcaption></figure>

* **Delivery Report:** If enabled, sends a delivery report for the refresh task. Provide the following details:
  * **To:** Specify the recipient(s) of the email (mandatory).
  * **CC/BCC:** Add additional recipients if needed.
  * **Subject:** Enter a subject for the email notification (mandatory).
  * **Email Message:** Provide additional details or notes to include in the delivery report.