4 ms·

Correct, the technology is based on Google Dremel.

• jbellis 14y ago
  My reading was that columnar storage was a critical piece of Dremel. "Accessing the same data as Hive" doesn't sound like Impala is doing that. Is that optional then or is this just a query engine?
  • monstrado 14y ago
    I can't say for sure, but I believe Doug Cutting's Trevni format is already in the beta but it's a slow version. Impala is initially focusing on architecture, I'm sure columnar format will have attention eventually. https://github.com/cutting/trevni https://github.com/cutting/trevni
• hobbyist 14y ago
  But google's dremel actually doesnt use Map-Reduce at all. So is this using just the HDFS and a new layer along side map-r that is using the HDFS?
  • qwertymaniac 14y ago
    Impala does not seem to be using MR at all, see note: https://ccp.cloudera.com/display/IMPALA10BETADOC/Impala+Frequently+Asked+Questions#ImpalaFrequentlyAskedQuestions-HowdoesImpalacomparetoHive%2FPig%3FCanIdotransformsoraddnewfunctionality%3F https://ccp.cloudera.com/display/IMPALA10BETADOC/Impala+Freq...