2014-02-18 00:35:28 +00:00
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SDB (string database)
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2012-09-03 23:46:12 +00:00
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=====================
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2013-04-01 03:52:21 +00:00
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sdb is a simple string key/value database based on djb's cdb
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disk storage and supports JSON and arrays introspection.
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2012-09-03 23:46:12 +00:00
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mcsdbd is a memcache server with disk storage based on sdb.
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2013-04-01 03:52:21 +00:00
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It is distributed as a standalone binary and a library.
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2012-09-03 23:46:12 +00:00
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2013-04-01 03:52:21 +00:00
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There's also the sdbtypes: a vala library that implements
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several data structures on top of an sdb or a memcache instance.
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2012-09-03 23:46:12 +00:00
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2015-04-01 12:09:23 +00:00
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[](https://travis-ci.org/radare/sdb)
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2014-04-16 04:26:47 +00:00
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[](http://ci.rada.re/job/sdb/)
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[](https://scan.coverity.com/projects/1651)
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2013-04-01 03:52:21 +00:00
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Author
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------
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pancake <pancake@nopcode.org>
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2012-09-03 23:46:12 +00:00
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Contains
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--------
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2013-04-01 03:52:21 +00:00
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* namespaces (multiple sdb paths)
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* atomic database sync (never corrupted)
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* bindings for vala, luvit, newlisp and nodejs
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2012-09-03 23:46:12 +00:00
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* commandline frontend for sdb databases
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* memcache client and server with sdb backend
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2013-04-01 03:52:21 +00:00
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* arrays support (syntax sugar)
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2012-09-03 23:46:12 +00:00
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* json parser/getter (js0n.c)
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Rips
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----
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* disk storage based on cdb code
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* linked lists from r2 api
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2016-10-20 19:12:52 +00:00
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Compilation
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-----------
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For native builds just type `make`. Everything will be compiled twice to get the .dylib and .a and sdb in PIC and nonPIC modes.
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To compile with Emscripten for Javascript:
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make CC=emcc EXT_EXE=.js
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2012-09-03 23:46:12 +00:00
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Changes
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-------
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2013-04-01 03:52:21 +00:00
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I have modified cdb code a little to create smaller databases and
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be memory leak free in order to use it from a library.
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2012-09-03 23:46:12 +00:00
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The sdb's cdb database format is 10% smaller than the original
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one. This is because keylen and valuelen are encoded in 4 bytes:
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1 for the key length and 3 for the value length.
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In a test case, a 4.3MB cdb database takes only 3.9MB after this
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file format change.
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2013-04-01 03:52:21 +00:00
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Usage example
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-------------
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2012-09-03 23:46:12 +00:00
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Let's create a database!
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$ sdb d hello=world
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$ sdb d hello
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world
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2013-04-01 03:52:21 +00:00
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Using arrays (>=0.6):
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2014-01-30 22:45:30 +00:00
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$ sdb - '[]list=1,2' '[0]list' '[0]list=foo' '[]list' '[+1]list=bar'
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2013-04-01 03:52:21 +00:00
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1
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foo
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2
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2012-09-03 23:46:12 +00:00
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Let's play with json:
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$ sdb d g='{"foo":1,"bar":{"cow":3}}'
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2014-07-02 22:01:46 +00:00
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$ sdb d g:bar.cow
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2012-09-03 23:46:12 +00:00
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3
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2014-07-02 22:01:46 +00:00
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$ sdb - user='{"id":123}' user:id=99 user:id
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2013-04-01 03:52:21 +00:00
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99
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2012-09-03 23:46:12 +00:00
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2013-04-01 03:52:21 +00:00
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Using the commandline without any disk database:
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$ sdb - foo=bar foo a=3 +a -a
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bar
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4
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3
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2012-09-03 23:46:12 +00:00
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$ sdb -
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foo=bar
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foo
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bar
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a=3
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+a
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4
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-a
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2013-04-01 03:52:21 +00:00
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3
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2012-09-03 23:46:12 +00:00
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Remove the database
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2013-04-01 03:52:21 +00:00
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$ rm -f d
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