Polyhedra RDBMS VS MarkLogic Server

Enea Polyhedra is a family of the two main products Polyhedra IMDB and Polyhedra FlashLite.

MarkLogic Server is a multi-model database that has both NoSQL and trusted enterprise data management capabilities.

Real-Time Performance
Polyhedra RDBMS is designed for real-time applications, providing high-speed data processing and low-latency response times, which is critical for systems requiring immediate data updates and retrieval.
In-Memory Storage
The system stores data primarily in memory, allowing for quick access and updates, which significantly boosts performance for applications where speed is a priority.
Active-Active Replication
Polyhedra supports active-active replication, ensuring high availability and resilience by allowing multiple database instances to handle read/write operations simultaneously.
Event-Driven Architecture
The RDBMS supports an event-driven model that makes it suitable for dynamic environments, allowing the database to react to changes instantly without polling.
Flexible Data Model
Polyhedra provides a flexible data model with dynamic schema changes, allowing developers to evolve database schema without unnecessary downtime.

Memory Dependency
The reliance on in-memory storage means that data is vulnerable to loss in the event of a system crash unless proper mechanisms are in place for data persistence.
Limited Ecosystem
Polyhedra may have a smaller community and ecosystem compared to more widely-used databases like MySQL or PostgreSQL, potentially leading to limited third-party support and integrations.
Specialized Use Case
The focus on real-time performance makes Polyhedra ideal for specific applications, but it may not be the best fit for general-purpose databases where the emphasis is on storage capacity or complex query support.
Vendor Lock-In
As a proprietary solution, users may face challenges if moving away from Polyhedra in terms of both technical migration and licensing negotiations.
Cost
Polyhedra is a commercial product, and licensing costs can be a concern for small businesses or projects with tight budgets compared to open-source alternatives.

Multi-Model Database
MarkLogic Server is a multi-model database that supports documents, graphs, and relational data, allowing for versatility in storing and managing various data types.
Enterprise Features
Includes enterprise-grade features such as ACID transactions, built-in search capability, scalability, high availability, and disaster recovery.
Security
Offers advanced security controls including role-based access, encryption, and auditing, which are crucial for handling sensitive and regulated data.
Integrated Search
Provides powerful search capabilities out-of-the-box, which can index and search text, structure, and metadata across all data types efficiently.
Data Integration
Facilitates data integration from multiple sources, supporting seamless interoperability and operational data hubs, which is beneficial for complex data environments.

Complexity and Learning Curve
While rich in features, it may have a steep learning curve for new users, which could lead to a longer setup and training time.
Cost
Can be expensive, especially for smaller organizations, as it comes with licensing costs typical of enterprise-grade software.
Vendor Lock-in
Using a proprietary database like MarkLogic can create risks of vendor lock-in, potentially complicating data migrations to other platforms if needed.
Limited Community Support
Compared to open-source alternatives, there might be less community support available, which can be a drawback for troubleshooting or finding resources.
Performance Overhead
Due to its extensive feature set, there can be performance overhead, requiring careful management and optimal configuration to achieve desired performance.