Where is replication factor in Hadoop?
Thereof, what is replication factor in Hadoop?
Replication factor in HDFS is the number of copies of a file in file system. A Hadoop application can specify the number of replicas of a file it wants HDFS to maintain. This information is stored in NameNode.
Beside above, what is a replication factor? The total number of replicas across the cluster is referred to as the replication factor. A replication factor of 1 means that there is only one copy of each row on one node. A replication factor of 2 means two copies of each row, where each copy is on a different node.
In respect to this, how does Hadoop detect replication factor?
4 Answers. Try to use command hadoop fs -stat %r /path/to/file , it should print the replication factor. The second column in the output signify replication factor for the file and for the folder it shows - , as shown in below pic.
How do I change the replication factor in Hadoop?
For changing the replication factor across the cluster (permanently), you can follow the following steps:
- Connect to the Ambari web URL.
- Click on the HDFS tab on the left.
- Click on the config tab.
- Under "General," change the value of "Block Replication"
- Now, restart the HDFS services.