What is the difference between HBase and Cassandra?

What is the difference between HBase and Cassandra?

Architecture Cassandra has a masterless architecture, while HBase has a master-based one. This is the same architectural difference as between Cassandra and HDFS. By its nature, HBase relies heavily on other technologies, such as HDFS for storage, Apache Zookeeper for server status management and metadata.

When to use Accumulo?

HBase and Accumulo are column oriented databases that are schema-less. Databases such as HBase and Accumulo are best at performing multiple row queries and row scans. HBase and Accumulo allow the database to be queried by ranges and not just matching columns values.

What is Accumulo used for?

Accumulo provides application developers with a client library that is used to locate and communicate with tablet servers for writing data, and reading one or more key-value pairs.

How does Accumulo work with Hadoop?

With Apache Accumulo, users can store and manage large data sets across a cluster. Accumulo uses Apache Hadoop’s HDFS to store its data and Apache ZooKeeper for consensus. While many users interact directly with Accumulo, several open source projects use Accumulo as their underlying store.

What is accumulo in sqoop?

The Accumulo in sqoop is a sorted, distributed key and value store. It provides robust, extensible data storage and retrieves data. This is stable and it has own security for key and value. A large amount of data store, retrieve and manage the HDFS data.

What is kudu in Hadoop?

Back to glossary Apache Kudu is a free and open source columnar storage system developed for the Apache Hadoop. It is an engine intended for structured data that supports low-latency random access millisecond-scale access to individual rows together with great analytical access patterns.

Who invented accumulo?

the US National Security Agency
History. Accumulo was created in 2008 by the US National Security Agency and contributed to the Apache Foundation as an incubator project in September 2011. On March 21, 2012, Accumulo graduated from incubation at Apache, making it a top-level project.

Should I use MongoDB or Cassandra?

Conclusion: The decision between the two depends on how you will query. If it is mostly by the primary index, Cassandra will do the job. If you need a flexible model with efficient secondary indexes, MongoDB would be a better solution.