subhrajit mohanty Subhraj07

## experiment_save_mode.md

      
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                kyrsideris
                / experiment_save_mode.md
            
            
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              November 30, 2022 04:03
            
              
                Apache Spark SQL's `SaveMode`s when writing to Apache Cassandra
              
          
    Experimentation on Spark's SaveMode

Experiment on the effect of different SaveMode and Cassandra starting from a populated table
Summary

If the cassandra table that spark targets exists then

SaveMode.Append will update it
SaveMode.Overwrite will truncate and insert (but it requires option "confirm.truncate" -> "true")
SaveMode.Ignore will not perform any action on existing table
SaveMode.ErrorIfExists (default) will throw the following exception:
https://github.com/datastax/spark-cassandra-connector/blob/v2.0.6/spark-cassandra-connector/src/main/scala/org/apache/spark/sql/cassandra/DefaultSource.scala#L93-L96


## Setting up Cassandra for remote access.md

      
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                andykuszyk
                / Setting up Cassandra for remote access.md
            
            
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              March 6, 2025 18:26
            
              
                Setting up Cassandra for remote access
              
          
    Make these changes in the cassandra.yaml config file:
start_rpc: true
rpc_address: 0.0.0.0
broadcast_rpc_address: [node-ip]
listen_address: [node-ip]