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Berkeley DB
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<p>Berkeley DB (BDB) is an <a href="/facts/Embedded_database/FMl3mz5S">embedded database</a> <a href="/facts/Software/RP79lVSW">software</a> <a href="/facts/Library_(computing)/xRzL3P7q">library</a> for <a href="/facts/Key%25E2%2580%2593value_database/Yee8EIGE">key/value</a> data, historically significant in <a href="/facts/Open-source_software/HzTaB8E9">open-source software</a>. Berkeley DB is written in <a href="/facts/C_(programming_language)/Ky2No763">C</a> with API bindings for many other <a href="/facts/Programming_language/cWTYbgWa">programming languages</a>. BDB stores arbitrary key/data pairs as byte arrays and supports multiple data items for a single key. Berkeley DB is not a <a href="/facts/Relational_database/pEKGmJLy">relational database</a>, although it has database features including <a href="/facts/Database_transaction/q1Etrsl8">database transactions</a>, <a href="/facts/Multiversion_concurrency_control/bktUeU82">multiversion concurrency control</a> and <a href="/facts/Write-ahead_logging/cuFnz3Sf">write-ahead logging</a>. BDB runs on a wide variety of <a href="/facts/Operating_system/8XTuvMh2">operating systems</a>, including most <a href="/facts/Unix-like/YAKrAxzd">Unix-like</a> and <a href="/facts/Microsoft_Windows/bwhAhuSL">Windows</a> systems, and <a href="/facts/Real-time_operating_system/IvUCFwCL">real-time operating systems</a>. </p><p>BDB was commercially supported and developed by <a href="/facts/Sleepycat_Software/1kybmE02">Sleepycat Software</a> from 1996 to 2006. Sleepycat Software was acquired by <a href="/facts/Oracle_Corporation/0z14FygH">Oracle Corporation</a> in February 2006, who continued to develop and sell the C Berkeley DB library. In 2013 Oracle re-licensed BDB under the <a href="/facts/AGPL_3/n1h9A893">AGPL</a> license and released new versions until May 2020. <a href="/facts/Bloomberg_L.P./2NCtubRH">Bloomberg L.P.</a> continues to develop a <a href="/facts/Fork_(software_development)/D6khxhpr">fork</a> of the 2013 version of BDB within their <a href="/facts/Comdb2/kVqM5au9">Comdb2</a> database, under the original <a href="/facts/Sleepycat_license/YDM3jT6R">Sleepycat permissive license</a>. </p>