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Which of the following Hadoop file formats is supported by Impala?

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Which of the following Hadoop file formats is supported by Impala?

How Impala Works with Hadoop File Formats

File Type Format Compression Codecs
Text Unstructured bzip2, deflate, gzip, LZO, Snappy, zstd
Avro Structured Snappy, gzip, deflate
Hudi Structured Snappy, gzip, zstd, lz4; currently Snappy by default
RCFile Structured Snappy, gzip, deflate, bzip2

How does Impala work in Hadoop?

Impala uses the distributed filesystem HDFS as its primary data storage medium. Impala relies on the redundancy provided by HDFS to guard against hardware or network outages on individual nodes. Impala table data is physically represented as data files in HDFS, using familiar HDFS file formats and compression codecs.

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What is the difference between Cloudera Impala and hive?

Apache Hive might not be ideal for interactive computing whereas Impala is meant for interactive computing. Hive is batch based Hadoop MapReduce whereas Impala is more like MPP database. Hive supports complex types but Impala does not. Apache Hive is fault tolerant whereas Impala does not support fault tolerance.

What are the different file formats supported by HDFS system?

Hive and Impala table in HDFS can be created using four different Hadoop file formats:

  • Text files.
  • Sequence File.
  • Avro data files.
  • Parquet file format.

What is the difference between Avro and parquet?

AVRO is a row-based storage format, whereas PARQUET is a columnar-based storage format. PARQUET is much better for analytical querying, i.e., reads and querying are much more efficient than writing. Write operations in AVRO are better than in PARQUET. AVRO is much matured than PARQUET when it comes to schema evolution.

Can Impala work without hive?

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Hive (optional). Although only the Hive metastore database is required for Impala to function, you might install Hive on some client machines to create and load data into tables that use certain file formats.

What Enhancement do both hive and Impala provide to Hadoop How do they differ?

Hive LLAP allows customers to perform sub-second interactive queries without the need for additional SQL-based analytical tools. Impala offers fast, interactive SQL queries directly on our Apache Hadoop data stored in HDFS or HBase.

Who use Apache Impala?

Who uses Apache Impala? 18 companies reportedly use Apache Impala in their tech stacks, including Stripe, Agoda, and Expedia.com.

What is Apache Impala used for?

The Apache Impala project provides high-performance, low-latency SQL queries on data stored in popular Apache Hadoop file formats. The fast response for queries enables interactive exploration and fine-tuning of analytic queries, rather than long batch jobs traditionally associated with SQL-on-Hadoop technologies.

What is the Cloudera Impala open source codebase?

Today, we are announcing a fully functional, open-sourced codebase that delivers on that vision – and, we believe, a bit more – which we call Cloudera Impala. An Impala binary is now available in public beta form, but if you would prefer to test-drive Impala via a pre-baked VM, we have one of those for you, too.

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How does Impala integrate with CDH?

The high level of integration with Hive, and compatibility with the HiveQL syntax, lets you use either Impala or Hive to create tables, issue queries, load data, and so on. Impala integrates with the existing CDH ecosystem, meaning data can be stored, shared, and accessed using the various solutions included with CDH.

How does Impala work with HDFS?

Impala can access data directly from the HDFS file system. Impala also provides a SQL front-end to access data in the HBase database system, or in the Amazon Simple Storage System (S3). Impala returns results typically within seconds or a few minutes, rather than the many minutes or hours that are often required for Hive queries to complete.