Deleting Metadata in HDFS when Migrating Out of LDT
In an HDFS deployment, if you migrate from an LDT to a non-LDT environment, the administrator must delete the LDT mdstore file.
In the following example:
/hadoop/hdfs
is the mount point
/hadoop/hdfs/data
is the GuardPoint
To manage the migration:
-
In the CipherTrust Manager, click Client > Client Groups.
-
Click < host/client group name>. The Edit host/client group -
window opens. -
Click GuardPoints.
-
Select the appropriate HDFS directory with an LDT GuardPoint, and click Unguard.
-
Using the Ambari admin console, shutdown all NameNode/DataNode one by one. Ensure that no HDFS GuardPoints are busy.
-
Ensure that no GuardPoints are configured on any HDFS node in the cluster, type:
-
On the node running secfs, type:
-
On the system, verify that the metadata store has been removed from the secfs mount points, type:
-
Verify that the metadata store has been removed from the secfs mount points, type:
-
Repeat the above steps for each node in the HDFS cluster.