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

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Tuning the network

The Ethernet frames that are more than 1,500 bytes of payload MTU are known as jumbo frames. Enabling jumbo frames on all the network interfaces that Ceph is using for both the cluster and client network should improve the network throughput and overall network performance.

Jumbo frames should be enabled on the host as well as on the network switch side, otherwise, a mismatch in the MTU size will result in packet loss. To enable jumbo frames on the interface eth0, execute the following command:

# ifconfig eth0 mtu 9000

Similarly, you should do this for other interfaces that are participating in the Ceph networks. To make this change permanent, you should add this configuration in the interface configuration file.

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