cassandra architecture - Wikitechy https://www.wikitechy.com/interview-questions/tag/cassandra-architecture/ Interview Questions Mon, 13 Sep 2021 11:46:51 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.4 https://www.wikitechy.com/interview-questions/wp-content/uploads/2025/10/cropped-wikitechy-icon-32x32.png cassandra architecture - Wikitechy https://www.wikitechy.com/interview-questions/tag/cassandra-architecture/ 32 32 What is the use of Cassandra database ? https://www.wikitechy.com/interview-questions/cassandra/what-is-the-use-of-cassandra-database/ https://www.wikitechy.com/interview-questions/cassandra/what-is-the-use-of-cassandra-database/#respond Tue, 13 Jul 2021 05:36:30 +0000 https://www.wikitechy.com/interview-questions/?p=440

Cassandra database:

  • Apache Cassandra is a high-performance provides database to manage large number of data among many commodity servers and then it is highly scalable.
  • It is a type of NoSQL database.
  • Apache Cassandra can be used for different applications.

In activity-tracking and monitoring applications:

  • Numerous entertainment and media organisations use Cassandra to observe user activity based on movies, music, albums, artists or other parameters.

In heavy write systems or in time-series-based applications:

  • Cassandra is best for heavy write systems .For example, data is logged for each request based on hits in web analytics, by type of browser, traffic sources, position, character, technology, tools, etc.

In social media analytics:

  • Cassandra is used by many social media providers to recognize the data and gives recommendations to their users.

In product catalogues and retail applications:

  • A very popular use case of Cassandra is to show fast product catalog inputs and lookup, and in retail applications.

Messaging:

  • Cassandra serves as the database backbone for countless mobile phone and message providers’ applications.
what is the cassandra database

What is the use of Cassandra?

cap theorem
  • Apache Cassandra is a high-performance provides database to manage large number of data among many commodity servers and then it is highly scalable.
Use of apache cassandra
]]> https://www.wikitechy.com/interview-questions/cassandra/what-is-the-use-of-cassandra-database/feed/ 0 What is the most widely used API to write data to Cassandra ? https://www.wikitechy.com/interview-questions/cassandra/what-is-the-most-widely-used-api-to-write-data-to-cassandra/ https://www.wikitechy.com/interview-questions/cassandra/what-is-the-most-widely-used-api-to-write-data-to-cassandra/#respond Tue, 13 Jul 2021 05:21:20 +0000 https://www.wikitechy.com/interview-questions/?p=434

API to write data to Cassandra:

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  • In contrast, using the REST API allows the Java piece to be changed or replaced without having to re-create your input process.
  • Another advantage to using an API for writing is that you can queue input requests if there is a surge in usage or incoming requests to handle them as quickly as possible without message loss due to maximum connection limits or other networking issues.
  • NoSQL stores are now an mandatory part of any framework, the SMACK stack (Spark, Mesos, Akka, Cassandra and Kafka) is becoming well popular.
  • Its demonstrated scalability and its high write throughput create it the perfect partner to manage the flood of time series, IOT and industrial scale streams or financial data.
  • This made Apache Cassandra an clear choice as a Connect API in Kafka sink.
api to write data to cassandra
]]> https://www.wikitechy.com/interview-questions/cassandra/what-is-the-most-widely-used-api-to-write-data-to-cassandra/feed/ 0 What is the internal architecture of the Cassandra database ? https://www.wikitechy.com/interview-questions/cassandra/what-is-the-internal-architecture-of-the-cassandra-database/ https://www.wikitechy.com/interview-questions/cassandra/what-is-the-internal-architecture-of-the-cassandra-database/#respond Tue, 13 Jul 2021 05:17:52 +0000 https://www.wikitechy.com/interview-questions/?p=432

Internal Architecture For Cassandra database:

  • Cassandra is build to manage big data workloads among multiple nodes with no single point of failure.
  • Its architecture is depend on the understanding of system and hardware failures can and do exist.
  • Cassandra is a row-oriented database.
  • Cassandra is build to manage big data.
  • Cassandra’s main characteristic is to store data on multiple nodes with no single point of failure.
  • The reason for this kind of Cassandra’s architecture was that the hardware failure can happened at any time. Any node can be down.
cap theorem
  • Cassandra is build in distributed architecture.In case of failure data stored in another node can be used.
  • Cassandra saves data in various nodes with a peer to peer distributed fashion framework.
  • All the nodes exchange information with each other using Gossip protocol.
  • Gossip is a protocol in Cassandra by which nodes can transfer with each other.

Components of Cassandra:

cassandar cluster node
]]> https://www.wikitechy.com/interview-questions/cassandra/what-is-the-internal-architecture-of-the-cassandra-database/feed/ 0 What is the best method for storing lists of large objects in Cassandra ? https://www.wikitechy.com/interview-questions/cassandra/what-is-the-best-method-for-storing-lists-of-large-objects-in-cassandra/ https://www.wikitechy.com/interview-questions/cassandra/what-is-the-best-method-for-storing-lists-of-large-objects-in-cassandra/#respond Tue, 13 Jul 2021 05:08:24 +0000 https://www.wikitechy.com/interview-questions/?p=428

Cassandra large objects:

nosql database
  • All header information variables become static attached to your primary key.
  • Parcel information will become non-static variables.
  • Your clustering column will identify each parcel data object.
  • This way you should get all parcel information belonging to a header with just one lookup. (There are many examples out there in the web, describing this pattern).
  • Generally speaking, it’s never a good idea to build relationships in Cassandra with the use of multiple tables.
  • If there’s no way out use data duplication to achieve “single read get’s all” queries.
storing lists of large objects in cassandra
]]> https://www.wikitechy.com/interview-questions/cassandra/what-is-the-best-method-for-storing-lists-of-large-objects-in-cassandra/feed/ 0 What is the history of the Cassandra database ? https://www.wikitechy.com/interview-questions/cassandra/what-is-the-history-of-the-cassandra-database/ https://www.wikitechy.com/interview-questions/cassandra/what-is-the-history-of-the-cassandra-database/#respond Tue, 13 Jul 2021 04:45:53 +0000 https://www.wikitechy.com/interview-questions/?p=411

History of the Cassandra database:

  • Amazon’s dynamo and Prashant malik are written by Avinash Lakshman at first succeed Cassandra at Facebook to capable the Facebook inbox search purpose.
  • In July 2008,Facebook published Cassandra as an open-source project on Google code.
  • In March 2009 it develop an Apache incubator project.
  • On february 17, 2010 it qualify to a top-ranking project.
history of database

Releases after graduation include

  • Added help for integrated caching, and Apache Hadoop MapReduce distributed 0.6 in Apr 12 2010.
  • Added secondary indexes and online schema changes distributed 0.7 in Jan 08 2011.
  • Added the Cassandra Query Language (CQL), self-tuning memTables, and help for zero-downtime upgrades distributed 0.8 in Jun 2 2011.
  • Added integrated compression, levelled compaction, and improved read-performance distributed 1.0 in Oct 17 2011,
  • Added self-tuning caches, row-level isolation, and support for mixed ssd/spinning disk deployments distributed 1.1 in Apr 23 2012,
  • Added clustering among virtual nodes, inter-node communication, atomic batches, and request tracing distributed 1.2 in Jan 2 2013,
  • Added lightweight transactions (based on the Paxos consensus protocol), triggers, improved compactions distributed 2.0 in Sep 4 2013,
  • In Sep 10 2014 publish 2.1
  • In July 20, 2015 publish 2.2
  • In November 11, 2015 publish 3.0
  • Monthly publish tick-tock like release model in 3.1 across 3.10. When even-numbered contain both bug fixes and new features while odd-numbered involve bug fixes only.
  • In June 23, 2017 publish 3.11 as a stable and it distributed series and bug fix from the last tick-tock characteristic publish.
history of the cassandra database
]]> https://www.wikitechy.com/interview-questions/cassandra/what-is-the-history-of-the-cassandra-database/feed/ 0 What is Cassandra database software ? https://www.wikitechy.com/interview-questions/cassandra/what-is-cassandra-database-software/ https://www.wikitechy.com/interview-questions/cassandra/what-is-cassandra-database-software/#respond Tue, 13 Jul 2021 04:40:35 +0000 https://www.wikitechy.com/interview-questions/?p=409

Cassandra database software

  • Apache Cassandra is a simple and open-source provides NoSQL DBMS build to handle huge volume of data against more fabric servers.It providing high availability with no single point of failure.
  • The performance of Cassandra place a high value. In 2012, University of Toronto researchers studying NoSQL systems resulted that “Scalability defined there is a clear winner throughout our experiments.Cassandra achieves the largest throughput for the large number of nodes in all experiments” although “it determine at the price of high write and read latencies.”
cap theorem

Main features:

Decentralized

  • Cluster contain every node has the same role.
  • There is no single point of failure.
  • To provides data across the cluster so every node have various data, but there is no master as every node can service if any request.

Supports replication and multi data center replication:

  • Replication strategies are configurable.
  • Cassandra is built as a distributed system, for deployment of maximum numbers of nodes across many data centers.
  • Key features of Cassandra’s distributed architecture are specifically change for multiple-data center deployment, for redundancy, for fail over and disaster recovery.

Scalability:

  • As new machines are added read and write throughput both increase linearly, with the achieve of no halt or interrupt to applications.

Fault-tolerant

  • Data is automatically replicated to many nodes for fault-tolerance. Replication across multiple data centers is maintained. Failed nodes can be changed with no downtime.
cassandra

Tunable consistency

  • Writes and reads gives a adjustable level of consistency, all the way from “writes never fail” to “block for all replicas to be readable”, with the quorum level in the middle.

MapReduce support

  • Cassandra has Hadoop integration, with MapReduce support.
  • There is support also for Apache Pig and Apache Hive.
apache cassandra
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