hdfsConnectAsUser()

Supported by libMapRClient for hadoop-2.x

Connects to a MapR File System cluster as specified user.

If a connection to the cluster in which the remote host is located already exists, the functions return a handle to this existing connection.

If a connection to the cluster does not already exist, the functions return a unique handle to a connection instance for each user.

NOTE If default is used for the host parameter, this means connect to the first cluster listed in the MAPR_HOME/conf/mapr-clusters.conf file on the client.

For more information about connections, see Establishing Connections to MapR File System.

Signature

hdfsFS hdfsConnectAsUser(const char* host, tPort port, const char* user)

Parameters

Parameter Description
host A string containing either a hostname or an IP address of a CLDB node of a MapR File System cluster.

To connect to the first MapR File System cluster that is specified in MAPR_HOME/conf/mapr-clusters.conf on the client, pass the value default and use the port number 0.

This parameter does not accept NULL as a value.
port The port on which the host is listening.
user The user connected to the cluster.

Return Value

Returns a handle to the connected file system, or NULL on error.