"Spark graduated from the Apache incubator. Spark claims up to 100x speed improvements over Apache Hadoop over in-memory datasets and gracefully falling back to 10x speed improvement for on-disk performance.
Since it was open sourced in 2010, Spark has been one of the most active projects in the community.Its fast growth can be attributed to a number of reasons. It can combine its own DSL with SQL for leveraging of the well known SQL language. Spark’s primary API is a Scala DSL"
Apache Spark™ - Lightning-Fast Cluster Computing
Run programs up to 100x faster than Hadoop MapReduce in memory,
or 10x faster on disk.
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