hadoop - how client will Get access to DataNodes -


I have a little doubt about reading and writing HDFS. In general, when the customer wants to read / write data from HDFS, then he will ask NameNode for block information. After that, there will be some information about the enrollment block, which will include data. After that, the customers will go directly to Daytonode and will conduct the operation.

What if the customer does not ask for nomination for block information and should reach the detention directly without any authentication?

Can anyone explain this?

It depends on whether an authentication (such as Kerberos) was configured for the cluster. If not - this hack should work, even if it is good for it, it is not clear.

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