What is a good use case for Cassandra?
Why use Apache Cassandra – modernise your cloud Here we have outlined common use-cases: Time-series data: Cassandra excels at storing time-series data, where old data does not need to be updated. An example is log files from cloud infrastructure and apps.
What is Cassandra useful for?
Cassandra is one of the most efficient and widely-used NoSQL databases. Another key benefit of Cassandra is the massive volume of data that the system can handle. It can effectively and efficiently handle huge amounts of data across multiple servers.
Where is Cassandra database used?
Cassandra implements a Dynamo-style replication model with no single point of failure, but adds a more powerful “column family” data model. Cassandra is being used by some of the biggest companies such as Facebook, Twitter, Cisco, Rackspace, ebay, Twitter, Netflix, and more.
What problem does Cassandra solve?
Cassandra helps solve complicated tasks with ease Event logging, metrics collection, performing queries against the historical data — all of these tasks can seem dull, yet they are of utmost importance both for Big Data and DevOps workflows.
How does Netflix use Cassandra?
Netflix uses Cassandra for its scalability and lack of single points of failure and for cross-regional deployments. ” In effect, a single global Cassandra cluster can simultaneously service applications and asynchronously replicate data across multiple geographic locations.”
Why is Cassandra write heavy?
Conclusion: Cassandra’s Log-structured merge trees storage engine makes Cassandra suitable database for write heavy workload. There are also other factors which compliments it further like Cassandra’s Multi-master architecture and Partitioning of data across all nodes.
Is Cassandra good for reporting?
Cassandra reads data pretty well. But it’s good at reading as long as you know the primary key of data you want. If you don’t, Cassandra will have to scan all nodes to find what you need, which will take a while. And if the latency threshold is exceeded, the scan will not be completed at all.
Is Cassandra good for reads?
Cassandra has an excellent single-row read performance as long as eventual consistency semantics are sufficient for the use-case. Cassandra quorum reads, which are required for strict consistency, will naturally be slower than Hbase reads. Cassandra is excellent for write operations but not so fast on read operations.
Is Cassandra widely used?
Cassandra is the most popular wide column store database system on the market.
Why does Instagram use Cassandra?
Instagram uses Cassandra as a general key-value storage service, to support the user photo feed, direct messages, as well as for fraud detection. While exceptionally fast at writing data to disk, Instagram was finding that read times were starting to increase, resulting in slow performance for users.
Is Cassandra free for commercial use?
Cassandra is a free and open-source, distributed, wide-column store, NoSQL database management system designed to handle large amounts of data across many commodity servers, providing high availability with no single point of failure.
Is Cassandra good for searching?
What are the disadvantages of using Cassandra?
Using any of the above features the way you would expect them to work in a traditional database is certain to result in serious performance problems and in some cases a broken database. Another major mistake developers make in building a Cassandra database is making a poor choice for partition keys. Cassandra is distributed.
What are the common mistakes developers make in building a Cassandra database?
Another major mistake developers make in building a Cassandra database is making a poor choice for partition keys. Cassandra is distributed. This means you need to have a way to distribute the data across multiple nodes.
How is data distributed in Cassandra?
Cassandra is distributed. This means you need to have a way to distribute the data across multiple nodes. Cassandra does this by hashing a part of every table’s primary key called the partition key and assigning the hashed values (called tokens) to specific nodes in the cluster.
What are some companies using Cassandra?
Comcast is developing a highly scalable cloud DVR scheduling system on top of Cassandra. The system is responsible for managing all DVR data and scheduling logic for devices on the company’s X1 platform. Constant Contact uses Cassandra to manage social media data for over 400k small business customers.