Network statistics provide information about bandwidth usage on the front-end, back-end, and, if it is enabled, management networks used by the HCP system. HCP reports network statistics in these graphs:
•Front-end Network — This graph shows the number of bytes read from the node per second and the number of bytes written to the node per second over the front-end network. These are the total numbers of bytes across the [hcp_system] network and all user-defined networks.
•Back-end Network — This graph shows the number of bytes read from the node per second and the number of bytes written to the node per second over the back-end network.
•Management Network — This graph shows the number of bytes read from the node per second and the number of bytes written to the node per second over the management network. These are the total numbers of bytes across the [hcp_management] network. The management network graph is only shown if the network is enabled.
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Note: The amount of back-end network traffic generated by any given namespace is directly related to the ingest tier DPL defined for the namespace by its service plan. The higher the ingest tier DPL, the more back-end network traffic the namespace creates. |
Heavy traffic (greater than 120 MB per second) on both the front-end and back-end networks may mean that the HCP system has insufficient bandwidth to accommodate its workload. In this case, you may need to add nodes to the HCP system to increase the available bandwidth.
Heavy front-end traffic on some nodes, but not all of them, may indicate one of the following problems:
•The HCP subdomain is not correctly configured in your DNS. For information about configuring DNS for HCP, see Configuring DNS for HCP.
•Applications are repeatedly using the same IP addresses to access the system. In this case, you may want to suggest to tenant administrators that their applications use DNS or some other mechanism to help balance the workload across all the nodes in the system.
Heavy back-end traffic on some but not all nodes may mean that the distribution of objects across the nodes in the system is uneven. To verify that this is the case, check the logical volume usage statistics on the Hardware page in the System Management Console. To resolve the issue, submit a request to your authorized HCP service provider to run the Capacity Balancing service to bring the object distribution to a more balanced state.
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