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A comment on Tenzing: A SQL Implementation On The MapReduce Framework.

Re:Tenzing: A SQL Implementation On The MapReduce Framework by sigil on Tuesday January 24, 2012 @10:07AM (#3505024)
How does this relate to Dremel? I thought Dremel had a SQL frontend to MapReduce that was already in wide use at Google.

http://research.google.com/pubs/pub36632.html

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Re:Tenzing: A SQL Implementation On The MapReduce Framework by benmccann on Tuesday January 24, 2012 @11:07AM (#3505322)
Dremel is mostly used for SQL-like queries in logs processing while Tenzing is largely used to run SQL-like queries on BigTable.
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Re:Tenzing: A SQL Implementation On The MapReduce Framework by seporaitis on Tuesday January 24, 2012 @11:11AM (#3505341)
That's exactly the question I have. There seems to be couple of hints about it, e.g. in section #4.8:

"Tenzing has read-only support for structured (nested and repeated) data formats such as complex protocol buffer struc- tures. <...> The engine itself can only deal with flat relational data, unlike Dremel [17]"

And from section #5.4 I assume that currently they use Dremel query engine, but are in the works of creating another one.

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Re:Tenzing: A SQL Implementation On The MapReduce Framework by yaroslavvb on Tuesday January 24, 2012 @08:42PM (#3507977)
Dremel aka BigQuery has a dedicated execution engine, roughly an order of magnitude faster than MapReduce for typical SQL queries
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