The terms worker and slave seem to be used interchangeably. Are they the same?
Worker is used more frequently in the codebase:
aash@aash-mbp ~/git/spark$ git grep -i worker | wc -l
981
aash@aash-mbp ~/git/spark$ git grep -i slave | wc -l
348
aash@aash-mbp ~/git/spark$
Does it make sense to unify on one or the other?
