CODEWITHSUNDEEP
hadoophdfs
Vishal786btc
Vishal786btc

Reputation: 438

why there is a need of hadoop commands in Pseudo-distributed mode?

It might be a stupid question but I needed to know.

For example: Why do we need hadoop fs -ls command to list files? Instead why can't just ls be used?

If in pseudo-distributed mode, is that case part of filesystem is given to hadoop file system that is only accessible to hadoop namenode daemon...this is my guess. Please explain.

Upvotes: 0

Views: 34

Answers (1)

OneCricketeer
OneCricketeer

Reputation: 191973

ls will list all file spaces available to your computer

You can set the fs.defaultFS property to be file:///, the default, then both will act the same, but this is not considered pseudodistributed mode.

Pseudodistributed node requires that you specify a list of datanode and namenode volumes on each respective system in the cluster, and hdfs dfs commands will only list those files that are known by the namenode.

And its called pseudodistributed only because it's a single node. Once you have that working, adding another node should be straightforward given appropriate networking connections

Upvotes: 1

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