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Ceph Cookbook - Second Edition by Karan Singh, Michael Hackett, Vikhyat Umrao

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Troubleshooting network issues

Ceph storage depends highly upon the underlying network configuration and having a dedicated and reliable network connection. The network is one of the most important pieces in the cluster and is used by Ceph nodes in order to communicate with each other. An issue with the networking infrastructure can cause numerous issues on the Ceph cluster, from flapping OSDs (OSDs going down and up) to monitoring clock skew errors. Additionally, networking errors, such as packet loss or high latency, can cause stability and performance issues throughout the cluster.

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