The application im working on currently requires me to increment an attribute belonging to an item in DynamoDB many times in a 20 to 30 minute period. I've been doing some additional reading about ...

Could you highligh major differences between the two in architecture & functionality in 2019? And how that differences affect performance? For some reason this excellent question was tagged as...

According to the "Guide to Scaling Web Databases with MySQL Cluster", MySQL Cluster 7.3 can acchieve 99,999% availability while using synchronous update replication. This would be a antithesis to t...

We are using Aerospike DB and was going through the documentation. I could not find good explanation of algorithm explaining how Primary & Secondary index works. The documentation says it uses ...

I am having trouble while trying to understand the concept of semi-join and how it is different from conventional join. I have tried some article already but not satisfied with the explanation, cou...

I am picking up knowledge of consensus protocols in a distributed system. Such a distributed system does primary-backup on databases. I learned that "every consensus protocol can loop forever." fr...

I need a way to do key-value lookups across (potentially) hundreds of GB of data. Ideally something based on a distributed hashtable, that works nicely with Java. It should be fault-tolerant, and o...

NoSQL refers to non-relational data stores that break with the history of relational databases and ACID guarantees. Popular open source NoSQL data stores include: Cassandra (tabular, writte...