ALL COVERED TOPICS

NoSQL Benchmarks NoSQL use cases NoSQL Videos NoSQL Hybrid Solutions NoSQL Presentations Big Data Hadoop MapReduce Pig Hive Flume Oozie Sqoop HDFS ZooKeeper Cascading Cascalog BigTable Cassandra HBase Hypertable Couchbase CouchDB MongoDB OrientDB RavenDB Jackrabbit Terrastore Amazon DynamoDB Redis Riak Project Voldemort Tokyo Cabinet Kyoto Cabinet memcached Amazon SimpleDB Datomic MemcacheDB M/DB GT.M Amazon Dynamo Dynomite Mnesia Yahoo! PNUTS/Sherpa Neo4j InfoGrid Sones GraphDB InfiniteGraph AllegroGraph MarkLogic Clustrix CouchDB Case Studies MongoDB Case Studies NoSQL at Adobe NoSQL at Facebook NoSQL at Twitter

NAVIGATE MAIN CATEGORIES

Close

Cloudera Impala 1.0 Release Notes and A Couple of Questions

This is what I’ve been looking for since posting about Impala 1.0: the release notes. From the new features list:

  • support for ALTER TABLE
  • REFRESH for a single table
  • Hints for specifying particular join strategies
  • Dynamic resource management, allowing high concurrency for Impala queries

Question: if I remember correctly Impala uses a single process on each machine to execute queries.

  1. is it multi-threaded?
  2. does it do any memory/CPU management so one query is not completely exhausting any of these resources?
  3. what happens with the queries executing when this process fails?

Original title and link: Cloudera Impala 1.0 Release Notes and A Couple of Questions (NoSQL database©myNoSQL)