Need advice about which tool to choose?Ask the StackShare community!
Cassandra vs YugabyteDB: What are the differences?
What is Cassandra? A partitioned row store. Rows are organized into tables with a required primary key. Partitioning means that Cassandra can distribute your data across multiple machines in an application-transparent matter. Cassandra will automatically repartition as machines are added and removed from the cluster. Row store means that like relational databases, Cassandra organizes data by rows and columns. The Cassandra Query Language (CQL) is a close relative of SQL.
What is YugabyteDB? High-performance, , cloud-native distributed SQL database. It is a high-performance distributed SQL database for powering global, internet-scale applications. Built using a unique combination of high-performance document store, per-shard distributed consensus replication and multi-shard ACID transactions.
Cassandra can be classified as a tool in the "Databases" category, while YugabyteDB is grouped under "Search Engines".
Cassandra and YugabyteDB are both open source tools. Cassandra with 5.54K GitHub stars and 2.46K forks on GitHub appears to be more popular than YugabyteDB with 3.15K GitHub stars and 277 GitHub forks.
The problem I have is - we need to process & change(update/insert) 55M Data every 2 min and this updated data to be available for Rest API for Filtering / Selection. Response time for Rest API should be less than 1 sec.
The most important factors for me are processing and storing time of 2 min. There need to be 2 views of Data One is for Selection & 2. Changed data.

By 55M do you mean 55 million entity changes per 2 minutes? It is relatively high, means almost 460k per second. If I had to choose between Scylla or Cassandra, I would opt for Scylla as it is promising better performance for simple operations. However, maybe it would be worth to consider yet another alternative technology. Take into consideration required consistency, reliability and high availability and you may realize that there are more suitable once. Rest API should not be the main driver, because you can always develop the API yourself, if not supported by given technology.

i love syclla for pet projects however it's license which is based on server model is an issue. thus i recommend cassandra

Scylla can handle 1M/s events with a simple data model quite easily. The api to query is CQL, we have REST api but that's for control/monitoring

Cassandra is quite capable of the task, in a highly available way, given appropriate scaling of the system. Remember that updates are only inserts, and that efficient retrieval is only by key (which can be a complex key). Talking of keys, make sure that the keys are well distributed.
Pros of Cassandra
- Distributed115
- High performance95
- High availability80
- Easy scalability74
- Replication52
- Multi datacenter deployments26
- Reliable26
- OLTP9
- Open source7
- Schema optional7
- Workload separation (via MDC)2
- Fast1
Pros of YugabyteDB
Sign up to add or upvote prosMake informed product decisions
Cons of Cassandra
- Reliability of replication3
- Updates1