---
title: "Checkpoints and Recovery"
canonical: "https://rmanwiki-27.pixar.com/space/RFH27/544645601/Checkpoints%20and%20Recovery"
format: markdown
---
> ℹ️ For Rendering to Disk only. Checkpoints and recovery are ignored for interactive rendering.
### Recovery
Recovery allows us to resume/recover from the previously paused or incomplete stopped render. To turn it on, check **Recover Render** in RenderMan RIS ROP's **Advanced **Tab.
### Checkpoints
Render recovery is often used with checkpointing. To turn it on, check **Recover Render** in RenderMan RIS ROP's **Advanced** > **Render **Tab.
- Interval - the time between checkpoint saves
- Exit At - Exit the render at this time and render no more
- As Final - Even if the render completes, save the data necessary to pick up the render. This will result in a larger file
- Keep Files - Name and preserve all the past checkpoints instead of only the more recent one
- Command - Command for the RIB file location (if one is generated)
**Incremental Renders**
> ❌ Incremental renders are not recoverable without checkpointing enabled. With incremental on and checkpoints off, the buckets are not written out until the end of the render. See table below:
| **incremental** | **checkpoints** | **recoverable** |
| --- | --- | --- |
| On | Disabled | No |
| On | Enabled | Yes |
| Off | Disabled | Yes |
| Off | Enabled | Yes |
*Recoverable Render Settings*
**Recovery and 'keepfiles'**
> ❌ Do not enable the keepfiles option for checkpointing if you want to use the recover capability.
> ❌
> ❌ Option "checkpoint" "uniform int keepfiles" [0]
The keepfiles option causes prman to save a sequence of checkpoints for debugging purposes giving each checkpoint image a unique file name tagged with increment and elapsed render time. However, when attempting to recover a file, prman won't scan your directory for checkpointed files or try to choose one. It will only look for the file by the original render output name.
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