Data Balance

When adding a new Core node to the cluster, expanding Core nodes, or when node storage is unbalanced, the cluster can perform a data balance operation. Select the corresponding cluster instance and click on the “Data Balance” button to go to the pop-up operation page.

After selecting the clusters, click on the Data Balance button in the management interface on the right, to open the Data Balance pop-up as follows:

Data Balance provides two parameters:

• Disk Usage: The condition for cluster balance. The difference in disk usage between the DataNode node and the total cluster usage. When the difference is greater than this parameter, data balance will be triggered. Note: When there is an application reading and writing files to the cluster, some nodes may not temporarily reach the set threshold.

• Occupied Bandwidth: The maximum value of data migration bandwidth. Setting too high may affect the cluster’s own reading and writing, it is recommended to set as needed.

The process of balancing data will have a certain impact on the performance of the cluster, and the duration varies depending on the amount of data in the cluster and the degree of balance.