MemcacheDB (pronunciation: mem-cash-dee-bee) is a persistence enabled variant of

memcached Memcached (pronounced variously ''mem-cash-dee'' or ''mem-cashed'') is a general-purpose distributed memory caching, memory-caching system. It is often used to speed up dynamic database-driven websites by caching data and Object (computer science) ...

. MemcacheDB has not been actively maintained since 2009. It is a general-purpose distributed memory caching system often used to speed up dynamic

database In computing, a database is an organized collection of data stored and accessed electronically. Small databases can be stored on a file system, while large databases are hosted on computer clusters or cloud storage. The design of databases spa ...

-driven websites by caching data and

objects Object may refer to: General meanings * Object (philosophy), a thing, being, or concept ** Object (abstract), an object which does not exist at any particular time or place ** Physical object, an identifiable collection of matter * Goal, an ai ...

memory Memory is the faculty of the mind by which data or information is encoded, stored, and retrieved when needed. It is the retention of information over time for the purpose of influencing future action. If past events could not be remembered ...

. It was developed by Steve Chu and Howard Chu. The main difference between MemcacheDB and memcached is that MemcacheDB has its own key-value database system. based on

Berkeley DB Berkeley DB (BDB) is an unmaintained embedded database software library for key/value data, historically significant in open source software. Berkeley DB is written in C with API bindings for many other programming languages. BDB stores arbit ...

, so it is meant for persistent storage rather than limited to a non-persistent cache. A version of MemcacheDB using

Lightning Memory-Mapped Database Lightning Memory-Mapped Database (LMDB) is a software library that provides an embedded transactional database in the form of a key-value store. LMDB is written in C with API bindings for several programming languages. LMDB stores arbitrary ...

(LMDB) is also available, offering greater performance. MemcacheDB is accessed through the same protocol as memcached, so applications may use any memcached API as a means of accessing a MemcacheDB database. MemcacheQ is a MemcacheDB variant that provides a simple

message queue In computer science, message queues and mailboxes are software-engineering components typically used for inter-process communication (IPC), or for inter-thread communication within the same process. They use a queue for messaging – th ...

service. Active development of MemcacheDB seems to have currently stopped; the web page hasn't been updated since 2009.

References

{{Reflist Cross-platform software Structured storage Free database management systems Software using the BSD license

See also

References