QDBM is a library of routines for managing a database. The database is a simple data file containing records, each is a pair of a key and a value. Every key and value is serial bytes with variable length. Both binary data and character string can be used as a key and a value. There is neither concept of data tables nor data types. Records are organized in hash table or B+ tree.
As for database of hash table, each key must be unique within a database, so it is impossible to store two or more records with a key overlaps. The following access methods are provided to the database: storing a record with a key and a value, deleting a record by a key, retrieving a record by a key. Moreover, traversal access to every key are provided, although the order is arbitrary. These access methods are similar to ones of DBM (or its followers: NDBM and GDBM) library defined in the UNIX standard. QDBM is an alternative for DBM because of its higher performance. ...
Tokyo Cabinet is a library of routines for managing a database. The database is a simple data file containing records, each is a pair of a key and a value. Every key and value is serial bytes with variable length. Both binary data and character string can be used as......
Kyoto Cabinet is a library of routines for managing a database. The database is a simple data file containing records, each is a pair of a key and a value. Every key and value is serial bytes with variable length. Both binary data and character string can be used as......
LevelDB stores keys and values in arbitrary byte arrays, and data is sorted by key. It supports batching writes, forward and backward iteration, and compression of the data via Google's Snappy compression library.LevelDB is not a SQL database. Like other NoSQL and Dbm stores, it does not have a relational......
ArangoDB database is an open-source NoSQL solution with a flexible data model for documents, graphs, and key-values. Build high performance applications using a convenient sql-like query language or JavaScript extensions.......
Berkeley DB (BDB) is a software library that provides a high-performance embedded database for key/value data., Berkeley DB is the most widely used database toolkit in the world, with hundreds of millions of deployed copies. Berkeley DB is written in C with API bindings for C++, PHP, Java, Perl, Python,......
Yet another in-memory key/value storage written in Go......
Redis is an open-source, networked, in-memory, key-value data store with optional durability. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets and sorted sets.......
Amazon DynamoDB is a fully managed NoSQL database service offered by Amazon.com as part of the Amazon Web Services portfolio. It was announced by Amazon CTO Werner Vogels on January 18, 2012.OverviewDynamoDB differs from other Amazon services by allowing developers to purchase a service based on throughput, rather than storage.......
EJDB — Embedded JSON Database engine. The main goal of this project to create the fast MongoDB-like database engine library which can be embed into C/C++ applications under terms of LGPL license.EJDB is the C library based on modified version of Tokyo Cabinet.Features: MongoDB-like queries and overall philosophy. Collection level......
HyperDex is the next generation key-value store. It provides a rich API, strong consistency, fault-tolerance, and transactions.......
UnQLite is a in-process software library which implements a self-contained, serverless, zero-configuration, transactional NoSQL database engine. UnQLite is a document store database similar to MongoDB, Redis, CouchDB etc. as well a standard Key/Value store similar to BerkeleyDB, LevelDB, etc.UnQLite is an embedded NoSQL (Key/Value store and Document-store) database engine. Unlike......
Datomic is a database of flexible, time-based facts, supporting queries and joins, with elastic scalability, and ACID transactions.......
SAP HANA is a completely re-imagined platform for real-time business.It transforms business by streamlining transactions, analytics, planning, predictive, sentiment data processing on a single in-memory database so business can operate in real-time.......
MarkLogic is the only Enterprise NoSQL database, bringing all the features you need into one unified system: a document-centric, schema-agnostic, structure-aware, clustered, transactional, secure, database server with built-in search and a full suite of application services.......
A high performance NoSQL like Redis powered by Go.......
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