Google LevelDB research

leveldb-info.md

LevelDB is Google's embedded key/value store that uses similar design concepts as the BigTable Tablet

Code

• https://github.com/nulayer/NULevelDB/blob/master/Classes/NULDBUtilities.mm
• https://github.com/hoisie/LevelDB-ObjC/blob/master/Classes/LevelDB.mm
• https://github.com/preble/APLevelDB/blob/master/APLevelDB/APLevelDB.mm

Projects

• https://github.com/ideawu/ssdb
• https://github.com/buf1024/remotedb

Docs/Articles

• http://en.wikipedia.org/wiki/LevelDB
• https://news.ycombinator.com/item?id=2526032
• https://news.ycombinator.com/item?id=2526263 - Chrome uses leveldb as the back-end for IndexedDB 1 2 3
• http://nparashuram.com/IndexedDB/
• http://leveldb.googlecode.com/svn/trunk/doc/index.html
• http://www.quora.com/LevelDB
• Optimizing LevelDB for Performance and Scale - YouTube

Other

• https://github.com/couchbaselabs/TouchDB-iOS/wiki/Guide%3A-Data-Model
• https://github.com/couchbase/couchbase-lite-ios/wiki/Guide%3A-Data-Model
• https://github.com/Softmotions/ejdb - Uses key/data store as backend to create a nosql database
• http://www.postgresql.org/docs/9.1/static/hstore.html
• https://github.com/msgpack/msgpack-c - Enhanced JSON serialization

Benchmark (2011), compares LevelDB (revision 39) against SQLite3 (version 3.7.6.3) and Kyoto Cabinet's (version 1.2.67) TreeDB (a B+Tree based key-value store):
http://leveldb.googlecode.com/svn/trunk/doc/benchmark.html

Benchmark (2012), compares LevelDB version 1.5 (git rev dd0d562b4d4fbd07db6a44f9e221f8d368fee8e4), SQLite3 (version 3.7.7.1) and Kyoto Cabinet's (version 1.2.76) TreeDB (a B+Tree based key-value store), Berkeley DB 5.3.21, and OpenLDAP MDB (git rev 2e677bcb995b63d36461eea254f2134ebfe29da2)
http://symas.com/mdb/microbench/

Bottom line: LevelDB is >= Sqlite3 (performance-wise)

schemaless sqlite:
http://blog.creapptives.com/post/47494540287/a-document-store-with-sqlite3-and-python
https://gist.github.com/maxpert/5341461- Python
https://github.com/stochastic-technologies/goatfish - Python :)
https://github.com/aheinze/MongoLite - PHP :(
https://github.com/williamstein/nosqlite - python

schemaless mysql:
http://backchannel.org/blog/friendfeed-schemaless-mysql
https://github.com/eklitzke/schemaless - Python
https://github.com/bitlove/friendly#readme - Ruby

Good read:
http://stackoverflow.com/questions/4189709/using-a-relational-database-for-schemaless-data-best-practices

relationships using key/value store:
http://degizmo.com/2010/03/23/redis-relations-in-a-nosql-world/

Google Search: key value store with mysql

Alternatives

BangDB:

http://www.iqlect.com/bangdb_embedded.php
http://highscalability.com/blog/2012/11/29/performance-data-for-leveldb-berkley-db-and-bangdb-for-rando.html

HyperDex (fork):

https://github.com/rescrv/HyperDex
https://github.com/rescrv/HyperLevelDB

Basho LevelDB (fork):

https://github.com/basho/leveldb

Sqlite as companion DB?

https://github.com/ccgus/fmdb

Full-text libs for key querying:

• https://github.com/wmorgan/whistlepig
• https://github.com/luceneplusplus/LucenePlusPlus
• Sqlite3/4 FTS

Taste of Riak: Python
http://docs.basho.com/riak/latest/dev/taste-of-riak/python/

Full-text search with Cocoa | Torsten Curdt's weblog
http://vafer.org/blog/20090107014544/

Modules · rvagg/node-levelup Wiki
https://github.com/rvagg/node-levelup/wiki/Modules

Browse by Keyword: "leveldb"
https://npmjs.org/browse/keyword/leveldb

whistlepig/test-search.c at master · wmorgan/whistlepig
https://github.com/wmorgan/whistlepig/blob/master/test-search.c

Class: Whistlepig::Query
http://masanjin.net/whistlepig/doc/Whistlepig/Query.html

CLucene - lightning fast C++ search engine
http://clucene.sourceforge.net/

MongoLab: MongoDB-as-a-Service (MongoDB hosting)
https://mongolab.com/welcome/

mongo-c-driver/src/bson.h at master · mongodb/mongo-c-driver
https://github.com/mongodb/mongo-c-driver/blob/master/src/bson.h

johnnyd/EJDBKit
https://github.com/johnnyd/EJDBKit

https://github.com/msgpack/msgpack-c

https://github.com/hillegass/BNRPersistence - Persistence layer for Tokyo Cabinet