Adjusting Parameters Related to Damaged DataNode Disk Volumes
Scenario
In the open source version, if multiple data storage volumes are configured for a DataNode, the DataNode stops providing services by default if one of the volumes is damaged. You can change the value of dfs.datanode.failed.volumes.tolerated to specify the number of damaged disk volumes that are allowed. If the number of damaged volumes does not exceed the threshold, DataNode continues to provide services.
Configuration Description
Navigation path for setting parameters:
Go to the All Configurations page of HDFS and enter a parameter name in the search box by referring to Modifying Cluster Service Configuration Parameters.
|
Parameter |
Description |
Default Value |
|---|---|---|
|
dfs.datanode.failed.volumes.tolerated |
Specifies the number of damaged volumes that are allowed before the DataNode stops providing services. By default, there must be at least one valid volume. The value -1 indicates that the minimum value of a valid volume is 1. The value greater than or equal to 0 indicates the number of damaged volumes that are allowed. |
Versions earlier than MRS 3.x: 0 MRS 3.x or later: –1 |
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