# Manage data operations In Pentaho Data Catalog, data operations refer to the various processes and strategies employed to optimize the storage and management of data across different environments. Data operations are designed to improve performance, reduce costs, and ensure efficient utilization of storage resources. You can monitor, verify, and examine details about your past, current, and pending data operations on the Data Operations page. ## Tour the Data Operations page In Data Catalog, the Data Operations page gives a user-friendly interface to view the data operations. To access the page, see [View data operations](#view-data-operations). On the page, you can filter operations using the **Completed**, and **Failed** tabs. In addition, you can enter the keywords in **Search** to search in the Data Operations names and shows the results of the operations items. ![Data Operations Landing Page](/files/YA7mUOT1VWPScic5oPP2) On the Data Operations page, you can view the list of data operations according to their status and you can filter the results using the **Completed** and **Failed** tabs. In addition, you can enter the keywords in **Search** to find names and view the results of specific operations. The following table describes the features and information available on the page.

Column	Description
	More options icon. Click More options and choose Rehydration to rehydrate a file. For more information, see Rehydrate.
Name	Name of the file.
Path	Path of the file.
Source	The source of the file.
Type	The action performed or scheduled.
Icon	Definition
	File tiered.
	File purged.
	File rehydrated.
Destination	The destination of the file.
Source Type	The source type of the file.
Destination Type	The data target type for the tiered or rehydrated file.
Status	The status of the data operation: - SUCCESS INIT (Initializing) FAILED
Tag	The tag applied to the file.
Action	The method used to begin the operation:- UI RULE
File Format	The file format of data.
Size	The size of the file.
Message	The message returned about the data operation by Data Optimizer.
Started	Time the operation began.
Ended	Time the operation ended.
Time taken	Total time taken for the operation.

## View data operations You can use the Data Operations page to understand the results of the data operations. It provides a detailed view of all completed, failed, or terminated operations helping you ensure data integrity and traceability. Perform the following steps to view data operations: 1. On the left navigation menu, click **Data Operations**. The Manage Data Operations page appears. 2. On the **Data Operations** card, click any one, **Submitted**, **Completed**, **Failed**, or **Terminated**. The Data Operations page appears displaying data operation records based on the selected status. You can see detailed metadata about each data operation. For more information, see [Tour the Data Operations page](#tour-the-data-operations-page). ## Rehydrate You can restore tiered files using rehydration. Rehydration uses the stub file created from tiering to restore the contents of the file. The stub file contains recall information that Data Catalog uses to rehydrate the file from the target to its original data source. You can selectively recall any file from its storage location and perform rehydration if a stub file exists in the file system. **Note:** * When a file is tiered, the last access time of the file does not change. * You cannot rehydrate a purged or deleted file. ### Rehydrate a migrated file Perform the following steps to rehydrate a file, except for HDFS: 1. On the **Menu**, click **Management**. The Manage Your Environment page opens. 2. On the **Data Operations** card, click **Submitted**, **Completed**, or **Failed**. The Data Operations page appears. 3. On the Data Operations page, locate the data operation or file that you want to restore, click the more icon, and then select **Rehydrate**. **Note:** You can also use **Search** to locate the file by name. Rehydration begins. You can monitor the status of the file’s rehydration on the Data Operations page. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.pentaho.com/pdc-admin/pdc-manage-data-operations.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.