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Append-only B+ tree implemented in C

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README.md

BPlus - CoW B+ tree in C Build Status

** Danger zone! Possible unicorns and rainbows! **

Both database engine and node.js bindings are in development now, use carefully.

Compiling

git clone git://github.com/indutny/bplus.git
cd bplus
make MODE=release
ls bplus.a # <- link your project with that file

Usage

#include <stdlib.h>
#include <stdio.h>

#include "bplus.h"

int main(void) {
  bp_db_t db;

  /* Open database */
  bp_open(&db, "/tmp/1.bp");

  /* Set some value */
  bp_sets(&db, "key", "value");

  /* Get some value */
  bp_value_t value;
  bp_gets(&db, "key", &value);
  fprintf(stdout, "%s\n", value.value);
  free(value.value)

  /* Close database */
  bp_close(&db);
}

See include/bplus.h for more details.

Benchmarks

One-threaded read/write (in non-empty database):

100000 items in db
write : 9865.357599 ops/sec
read : 57383.402903 ops/sec

Multi-threaded read (2 cores, 4 threads):

100000 items in db
get : 128841.821540 ops/sec

Compaction/Removal:

500000 items in db
compact: 23.143330s
remove : 16827.957592 ops/sec

And bulk insertion ~ 120000 items/sec .

Advanced build options

make MODE=debug # build with enabled assertions
make SNAPPY=0 # build without snappy (no compression will be used)

LICENSE

This software is licensed under the MIT License.

Copyright Fedor Indutny, 2012.

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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