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The total ranking of a product, represented by the bar length, is based on a weighted aggregate score. The score is calculated as follows: The product with the highest count in each area gets the highest available score. (20 points for Reviews; 16 points for Views, Comparisons, and Followers.) Every other product gets assigned points based on its total in proportion to the #1 product in that area. For example, if a product has 80% of the number of reviews compared to the product with the most reviews then the product's score for reviews would be 20% (weighting factor) * 80% = 16. For Average Rating, the maximum score is 32 points awarded linearly based on our rating scale of 1-10. If a product has fewer than ten reviews, the point contribution for Average Rating is reduced (one-third reduction in points for products with 5-9 reviews; two-thirds reduction for products with fewer than five reviews). Reviews that are more than 24 months old, as well as those written by resellers, are completely excluded from the ranking algorithm.
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NoSQL Databases Reviews

Read top reviews of NoSQL Databases solutions from the IT Central Station community:
Your trust is our top concern, so companies can't alter or remove reviews.
Real User
Vice President - Big Data and Delivery at a software R&D company with 51-200 employees
Nov 22 2016

What is most valuable?

* Cloudera Manager for administering the Hadoop cluster * Cloudera specific solutions like Impala * Extensive documentation * Good user community

How has it helped my organization?

Implementing a Hadoop cluster has become relatively straight-forward using CDH. Administering it is also less complex. As a result, efforts spent in these areas are less than anticipated.

What needs improvement?

* Some of the UI features seem confusing e.g. charts on the CM Services page * Sometimes it gets confusing to follow a single path for installation due to multiple recommended approaches e.g. parcels vs packages
Apache
Real User
Sr Manager, Engineering, Reporting & Analytics, Big data at a tech company with 1,001-5,000 employees
May 16 2017

What is most valuable?

I really appreciate the high availability, automated replication, linear scalability, and automated region fail-over.

How has it helped my organization?

We've used Apache Cassandra for solutions that we sell to our customers. It's used as our cloud based backend store as a temporary cache and for storing data that streams through our data pipe. It's an excellent high speed store.

What needs improvement?

Out-of-the-box monitoring, troubleshooting, and maintenance are involved. There are several utilities/interfaces available for use, but one would have to educate himself and learn the intricacies of managing a Cassandra cluster. For example,... more»

Have A Question About NoSQL Databases?

Our experts can help. 279,728 professionals have used our research on 6,322 solutions.
Apache
Real User
Principal Software Engineer at a tech company with 1,001-5,000 employees
Oct 10 2016

What do you think of Cassandra?

Valuable Features Log-structured storage CQL (Cassandra Structure Language) Ease of installation The node setup • Improvements to My Organization This product is used as the storage facility for a very-high-throughput application, where a lot of NoSQL data is being captured and it needs to be processed. • Room for Improvement The clustering needs to be better; it is getting there. • Use of Solution I have used it for four years. • Stability Issues Cassandra is stable thus far; the problems that I have encountered were with CQL and the JSON support in CQL. • Scalability Issues The scalability is good, as long as you understand how to set up the nodes. • Customer Service and Technical Support I did not have any interactions with technical support, because I...
MongoDB
Real User
Technical Architect at a tech services company with 51-200 employees
Jun 03 2018

What is most valuable?

* Its capability to do quick, powerful aggregations has caught my attention. * The search queries are pretty fast and mean time to get response is around 50-100/ms. * The installation is very stable.

How has it helped my organization?

We capture more than 30 million records every week in IoT NS. MongoDB has been serving us well so far. It is easier to maintain the data with its document-based storage.

What needs improvement?

Its indexing capabilities could be further improved. The libraries, e.g., Mongoose could still be improved to handle MongoDB. The improvements could be made to intelligence to detect disk storage and prevent MongoDB from crashing.
Apache
Real User
Java Architect at a tech vendor with 51-200 employees
Sep 06 2017

What do you think of Cassandra?

Valuable Features: Simple ring architecture Replication using peer-to-peer protocol rather than leader selection Linear scalability (99%) Configurable consistency • Improvements to My Organization: Ability to achieve write speeds 10k tps: Compared to existing, it is 300% percent higher. • Room for Improvement: Row-level locking is not available; might be very helpful in update use cases. • Use of Solution: for the past 2 years • Deployment Issues: older version of Cassandra 2.x having problem while restarting the nodes to the ring. New version from Cassandra 3.5.x onwards this issue got resolved. We are free to stop and start any nodes without any issues. • Stability Issues: no • Scalability Issues: no • Previous Solutions: The earlier solution...
Apache
Consultant
Database Developer at a tech services company with 10,001+ employees
Jan 18 2018

What do you think of Cassandra?

Primary Use Case I designed a product catalog data model in Cassandra according to their features and properties, loading millions of data and performing the required queries over it.  Now, I am getting much better performance than relational databases. • Valuable Features Here are some features which have been really helpful in my organisation: High Avaialability No downtime Better performance Greater scalability. HA is one of the great features of Cassandra with no downtime, e.g., you can achieve continuous data without a single downtime because of node to node ring architecture. • Room for Improvement Maybe they can improve their performance in data fetching from a high volume of data sets.  • Use of Solution One to three years. • Other Solutions Considered ...

Have A Question About NoSQL Databases?

Our experts can help. 279,728 professionals have used our research on 6,322 solutions.
24
Database Developer
Over 2 year of experience as a NoSQL database developer providing support and solutions for the projects. Experienced in NoSQL database like MongoDB Cassandra . Apart form that, I also have hands-on experience of PostgreSQL. Experienced in ETL Tool like Talend & Pentaho. Expertise in data... more>>

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