new-post: introducing the prune command in REANA client

content/posts/2023/reana-client-prune-command.md

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+---
+title: "Optimizing disk space in REANA workspaces: the prune command"
+date: 2023-12-05T07:00:00+01:00
+---
+
+With the introduction of the `prune` command, managing disk space in REANA workspaces has been simplified.
+This feature offers an efficient way to identify and remove temporary files,
+thereby conserving storage while preserving the reproducibility of your workflows.
+
+<!--more-->
+
+To manage the disk space in REANA, you might have used the `rm` command to manually
+delete unnecessary files, for example by running `reana-client rm -w myanalysis.42 tmp/mytmpdata.csv`.
+Although it worked, it was time-consuming and required extra care not to delete essential input or output files.
+
+`reana-client` includes the `prune` command as a more convenient and safer way to free up disk space
+in your REANA workspaces.
+It is designed to manage workspace files intelligently, automatically identifying and deleting
+temporary files that are neither inputs nor outputs, freeing up your storage significantly and effortlessly.
+Here's how you can use it:
+
+```console
+$ reana-client prune -w my-analysis.42
+==> SUCCESS: The workspace has been correctly pruned.
+```
+
+This will delete all temporary files in the workspace of the workflow `my-analysis.42`.
+If you need to free up even more space, you can also delete input or output files 
+by using the `--include-inputs` or `--include-outputs` flags, respectively.
+
+However, a word of caution: it's important to remember that running the `prune` command will permanently delete the files
+from your workspace. This means that you should make sure you have backed up any files you want to keep
+before running the command. Additionally, be careful when using the `--include-inputs` or
+`--include-outputs` flags, as deleting inputs will make it impossible to run your workflow
+again and by deleting output files you will lose the results of your workflow run.
+
+By the way, did you know you can keep your workspaces clean automatically? REANA features the possibility
+to configure one or more *workspace file retention rules* for your workflows that will automatically
+and periodically delete the specified files after a certain amount of time.
+You can read more about this feature in the [related blog post](https://blog.reana.io/posts/2022/workspace-file-retention-rules/).
+
+We hope you find this feature useful for managing your REANA workspaces and freeing up
+valuable disk space. As always, if you have any feedback or suggestions for how we can improve
+REANA, please let us know!
+
+## See also
+
+- [REANA Client](https://reana-client.readthedocs.io/en/latest/) documentation page
+- [Workspace retention rules](https://blog.reana.io/posts/2022/workspace-file-retention-rules/) blog post