User:Pkubat/BerkeleyDB alternatives

• LMDB
  • Written in: C
  • Wrappers for: C++, Java, Python, Perl, Ruby, Go, Erlang, PHP, Lua
  • Packages available for: Fedora 23+, EPEL6+
  • Latest release: 0.9.18 / 2016-02-05
  • License: OpenLDAP Public License
  • Search key length: Maximum length of 1/3 of a page (~1365B)
  • Read-only access to DB: The library is fully thread-aware and supports concurrent read/write access from multiple processes and threads. [docs]
  • Supported architectures: i386/x86-64/PowerPC/ARM
  • Query keys larger than X: Using cursors: MDB_SET_RANGE - Position at first key greater than or equal to specified key.

• Kyoto Cabinet (replacing Tokyo Cabinet)
  • Written in: C++
  • Wrappers for: C, Java, Python, Ruby, Perl, and Lua
  • Packages available for: Fedora 23+, EPEL5+
  • Latest release: 1.2.76 / 2012-05-24
  • License: GNU GPL
  • Search key length: No limit from database itself (uses c++ std::string or combination of c-style string and its length).
  • Read-only access to DB: See http://fallabs.com/kyotocabinet/spex.html, part Sharing One database by Multiple Processes. TL;DR: One DB cannot be accessed by multiple processes, DB file is protected by reader-writer lock (which means it will probably require write access even for read-only operation).
  • Supported architectures: Linux 2.6 and later (i386/x86-64/PowerPC/Alpha/SPARC)
  • Query keys larger than X: DB supports matching by regex, which should be possible to use for this kind of query. Other possibilities are match by prefix and match by similarity.

• LevelDB
  • Written in: C++
  • Wrappers for: Java, Go, Erlang, node.js
  • Packages available for: Fedora 23+, EPEL6+
  • Latest release: 1.18 / 2014-09-16
  • License: 3-Clause BSD
  • Search key length:
  • Read-only access to DB:
  • Supported architectures: i386/x86-64/PowerPC/ARM
  • Query keys larger than X:

• RocksDB (Built on LevelDB)
  • Written in: C++
  • Wrappers for: Java (In development)
  • Packages available for: Not available in Fedora?
  • Latest release: 4.9.0 / 2016-06-09
  • License: 3-Clause BSD
  • Search key length:
  • Read-only access to DB:
  • Supported architectures: x86-64/PowerPC/ARM
  • Query keys larger than X:

• UnQlite
  • Written in: C
  • Wrappers for:
  • Packages available for: Not yet available in Fedora
  • Latest release: 1.1.6 / 2015-08-26
  • License: 2-Clause BSD
  • Search key length:
  • Read-only access to DB:
  • Supported architectures:
  • Query keys larger than X:

Older (probably unmantained) projects

• TokyoCabinet (replacing QDBM)
  • Written in: C
  • Wrappers for: Perl, Ruby, Java, and Lua
  • Packages available for: Fedora 23+, EPEL5+, RHEL6+
  • Latest release: 1.4.48 / 2012-08-18
  • License: GNU LGPL
  • Search key length:
  • Read-only access to DB:
  • Supported architectures: Linux 2.4 and later (x86-32/x86-64/PowerPC/Alpha/SPARC)
  • Query keys larger than X:

• QDBM
  • Written in: C
  • Wrappers for: C++, Java, Perl, and Ruby
  • Packages available for: Fedora 23+
  • Latest release: 1.8.78 / 2007-03-07
  • License: GNU LGPL
  • Search key length:
  • Read-only access to DB:
  • Supported architectures: Linux (2.2, 2.4, 2.6) (IA32, IA64, AMD64, PA-RISC, Alpha, PowerPC, M68000, ARM)
  • Query keys larger than X:

• NDBM
  • Written in:
  • Wrappers for:
  • Packages available for:
  • Latest release:
  • License:
  • Search key length:
  • Read-only access to DB:
  • Supported architectures:
  • Query keys larger than X:

• GDBM
  • Written in:
  • Wrappers for:
  • Packages available for:
  • Latest release:
  • License:
  • Search key length:
  • Read-only access to DB:
  • Supported architectures:
  • Query keys larger than X: