Difference between Impala and hBASE

1. Impala: Impala is a query engine that runs on Hadoop. It provides high-performance, low-latency SQL queries on data stored in Hadoop. It is open-source software. It supports in-memory data processing. It is pioneering the use of the Parquet file format, a columnar storage layout that is optimized for large-scale queries typical in data warehouse scenarios. 

2. HBase: This model is used to provide random access to a large amount of structured data. It builds on the top of the hadoop file system and is column-oriented in nature. It is used to store the data in HDFS. It is an open-source database that provides data replication. 

Similarities:

1. Integration with the Hadoop ecosystem.
   Both Impala and hBASE are part of the Apache Hadoop ecosystem and are designed to work with HDFS. They leverage the distributed computing power of Hadoop and can be used alongside other Hadoop tools such as Hive, Pig, and MapReduce.
2. Scalability
   Both Impala and hBASE are designed to scale horizontally, meaning that additional nodes can be added to the cluster to increase capacity and handle growing amounts of data. This makes them suitable for big data processing and storage.
3. Distributed computing
   Both Impala and hBASE use a distributed computing architecture, with data distributed across multiple nodes in a cluster. This allows for parallel processing of queries and faster data retrieval.
4. Open source
   Impala and hBASE are both open-source technologies that are freely available to the public. This allows for greater collaboration and innovation within the developer community.
5. Fault tolerance
   Both Impala and hBASE are designed to be fault-tolerant, meaning that they can handle node failures without losing data. They use techniques such as replication and data sharding to ensure that data is always available and can be recovered in the event of a failure.

Difference between Impala and HBase:

Conclusion: mpala and hBASE are both powerful technologies that are designed for different use cases. Impala provides fast query performance and support for SQL querying and BI tools, while hBASE provides fast data access and retrieval for unstructured or semi-structured data.