These attributes are available in the blueprint.json file:
DataNode failed disk tolerance - Described as
dfs.datanode.failed.volumes.tolerated
DataNode maximum Java heap size - Described as
dtnode_heapsize
DataNode max data transfer threads - Described as
dfs.datanode.max.transfer.threads
I retrieved the full blueprint by using the following cURL statement:
curl -H "X-Requested-By: ambari" -X GET -u admin:admin <URL>:8080/api/v1/clusters/<CLUSTER_NAME>?format=blueprint > out.blueprint