Most companies simply don&#x27;t have the data volume to make Hadoop worthwhile. You can process tens of TB in an RDBMS on a beefy machine cheaper than a Hadoop cluster.<p>Hadoop is slow, but on huge data volume the overheads are dwarfed by the parallelism gained. Most companies don&#x27;t have huge volume though.<p>For example recently I saw someone propose using Hadoop for a sub-TB dataset...