The recommended way to read data from Hadoop to Splunk is to use Splunk Analytics for Hadoop: https://docs.splunk.com/Documentation/Splunk/latest/HadoopAnalytics/MeetSplunkAnalyticsforHadoop
The recommended way to write data from Splunk to Hadoop is to use Splunk Hadoop Data Roll: https://docs.splunk.com/Documentation/Splunk/latest/Indexer/ArchivingindexestoHadoop
If you want to use Presto, our recommendation is to use Splunk DB Connect (https://docs.splunk.com/Documentation/DBX) with Presto JDBC driver (for example, the JDBC found here https://prestodb.github.io/docs/current/installation/jdbc.html )
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