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| VoltDB | Eloquera | LevelDB | |
|---|---|---|---|
| Category | |||
| Preference | (47% global votes) | (25% global votes) | (33% global votes) |
| Website | www.voltdb.com | eloquera.com | code.google.com/p/leveldb/ |
| License | |||
| Design | |||
| Database model | |||
| Data storage | |||
| Embeddable | Yes | Yes | Yes |
| Features | |||
| Query language | |||
| Conditional entry updates | ? | ? | Yes |
| Map and reduce | Yes | No | No |
| Unicode | Yes | Yes | Yes |
| TTL for entries | ? | ? | No |
| Compression | ? | ? | Yes |
| Integrity | |||
| Integrity model | ? | ? | |
| Atomicity | Yes | Yes | Yes |
| Consistency | Yes | ? | Yes |
| Isolation | Yes | ? | ? |
| Durability (data storage) | Yes | ? | Yes |
| Transactions | Yes | Yes | Yes |
| Referential integrity | Yes | Yes | No |
| Revision control | Yes | No | Yes |
| Locking model | ? | ? | |
| Indexing | |||
| Secondary Indexes | Yes | ? | No |
| Composite keys | Yes | ? | No |
| Full text search | Yes | No | No |
| Geospatial Indexes | No | No | No |
| Graph support | Yes | Yes | No |
| Distribution | |||
| Horizontal scalable | Yes | Yes | No |
| Replication | Yes | Yes | No |
| Replication mode | ? | ? | |
| Sharding | Yes | Yes | No |
| Shared nothing architecture | Yes | ? | Yes |
| System requirements | |||
| Operating system | |||
| Native driver | |||
| Memory minimum | 4 GB | ? | ? |
| Architecture | |||
| Programming language | |||
| More | |||
| Description | VoltDB is an ACID-compliant OLTP database that can process millions of transactions per second on commodity servers that are loosely connected over a fast network. It is a highly scalable alternative to legacy SQL databases such as Oracle and MySQL. VoltDB is accessed using SQL, the industry standard data language, and is also accessible using popular key-value and document-style interfaces. | Pure .NET dynamic object database with REST API | Key/Value database |
| Multi-user system | Yes | Conditional | No |
| Documentation level | ★★★★★ | ? | ★★★☆☆ |
| Free to use | Yes | Yes | Yes |
| Active | Yes | Yes | Yes |
| Real time analytics | Yes | ? | ? |
| Backup functionality | Good | ? | ? |
| Free for commercial use | Yes | ? | ? |
| Target audience | ? | ? | |
| Download | ? | www.eloquera.com/download | https://code.google.com/p…wnloads/list |
| Brand | ? | ? | |
| Log | ? | ? | Yes |
| + Add row | + | + | + |
| VoltDB | Eloquera | LevelDB | |
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