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title: Fencing
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title: Fencing
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PVC features a fencing system to provide automatic recovery of nodes from certain failure scenarios. This document details the fencing process, limitations, and expectations, as well as how this factors into georedundant designs.
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PVC features a fencing system to provide automatic recovery of nodes from certain failure scenarios. This document details the fencing process, limitations, and expectations.
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You can also view a video demonstration of the fencing process in action here:
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[![Fencing Demonstration](https://img.youtube.com/vi/ZnhJ91-5y1Q/hqdefault.jpg)](https://youtu.be/ZnhJ91-5y1Q)
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[TOC]
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[TOC]
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@ -16,10 +20,6 @@ Fencing is enabled by default for all nodes that have the `fence_intervals` conf
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Fencing can be temporarily disabled by setting the cluster maintenance mode to `on` and resumed by setting it `off`. This can be useful during maintenance events however the administrator should be careful to `flush` any affected nodes of running VMs first to avoid trouble.
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Fencing can be temporarily disabled by setting the cluster maintenance mode to `on` and resumed by setting it `off`. This can be useful during maintenance events however the administrator should be careful to `flush` any affected nodes of running VMs first to avoid trouble.
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You can view a demonstration of the fencing process in action here:
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[![Fencing Demonstration](https://img.youtube.com/vi/ZnhJ91-5y1Q/hqdefault.jpg)](https://youtu.be/ZnhJ91-5y1Q)
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## IPMI Configuration
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## IPMI Configuration
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For fencing to be enabled, several configurations must be correctly set.
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For fencing to be enabled, several configurations must be correctly set.
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