# MemcacheDB

> distributed key-value storage system designed for persistent

**Wikidata**: [Q10858569](https://www.wikidata.org/wiki/Q10858569)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/MemcacheDB)  
**Source**: https://4ort.xyz/entity/memcachedb

## Summary
MemcacheDB is a distributed key-value storage system designed for persistent data storage. Technically classified as a database management system and free software, it acts as a subclass of Memcached, intended to provide persistent storage capabilities where Memcached typically provides volatile memory caching. It is licensed under the 3-clause BSD License.

## Key Facts
- **Classification:** Instance of free software and a database management system.
- **Description:** A distributed key-value storage system designed specifically for persistent storage.
- **Technical Hierarchy:** A subclass of Memcached.
- **License:** Distributed under the 3-clause BSD License.
- **Programming Language:** Written in C (Wikidata ID Q15777).
- **Website:** http://memcached.org/
- **Debian Package:** A "memcachedb" package existed in Debian Stable but was marked with an end time of November 5, 2018.
- **Wikipedia Presence:** Available in 4 language editions (Bulgarian, English, Persian, Turkish).

## FAQs
### Q: What is the primary difference between MemcacheDB and Memcached?
A: While Memcached is software that caches strings in computer memory (volatile), MemcacheDB is a distributed key-value storage system designed for persistent storage. It is technically a subclass of Memcached.

### Q: Is MemcacheDB free to use?
A: Yes, MemcacheDB is classified as free software and is released under the 3-clause BSD License.

### Q: In what programming language is MemcacheDB written?
A: According to structured data records, MemcacheDB is written in the C programming language.

## Why It Matters
MemcacheDB represents a specific evolution in the field of database management systems by bridging the gap between high-speed memory caching and long-term data persistence. While standard Memcached is widely used to accelerate web applications by caching data in RAM, it is inherently volatile—data is lost when the system restarts. MemcacheDB addresses this limitation by functioning as a distributed key-value store designed for persistence.

This distinction allows systems to utilize the simple key-value interface of Memcached without sacrificing data durability. Although its presence in major package repositories like Debian was discontinued in 2018, it remains a notable example of adapting caching protocols for permanent storage solutions. Its significance lies in its classification as both a database management system and free software, providing a BSD-licensed alternative for developers requiring distributed, persistent data handling.

## Notable For
- **Persistence:** Distinct from standard Memcached, it is explicitly designed for persistent storage rather than temporary caching.
- **Open Licensing:** Distributed under the permissive 3-clause BSD License.
- **Lineage:** Functions as a subclass of the widely-used Memcached system.
- **Distributed Architecture:** Functions as a distributed key-value storage system.

## Body
### Technical Overview
MemcacheDB is a database management system that utilizes a distributed key-value architecture. Its core design goal is persistence, distinguishing it from its parent technology, Memcached. While Memcached acts as a volatile cache for strings in computer memory, MemcacheDB is engineered to store data permanently. It is officially classified as free software and is a subclass of Memcached.

### Development and Licensing
The software is written in the C programming language. It is distributed to the public under the terms of the 3-clause BSD License, a permissive free software license. The project maintains an online presence at http://memcached.org/.

### Distribution and Availability
MemcacheDB has been packaged for various software repositories, though its status has fluctuated over time.
- **Debian:** A package named "memcachedb" was available in the Debian Stable repository; however, records indicate an end time for this package on November 5, 2018.
- **Other Repositories:** The software is listed with a MacPorts port identifier of "memcached" and a SlackBuilds package identifier of "network/memcached." It is tracked under the Repology project name "memcachedb."
- **Pro-Linux:** It is assigned database application ID 14143 on pro-linux.de.

### Encyclopedic Presence
MemcacheDB is registered in multiple knowledge bases. It holds the Freebase ID `/m/05s_v0j` and has a designated Quora topic. Its Wikipedia entry is maintained in four languages: Bulgarian (bg), English (en), Persian (fa), and Turkish (tr), with a total of 4 sitelinks. The copyright status of the software is classified as copyrighted.

## References

1. Google Developers
2. Quora
3. [Source](https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=912841)