Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
tree: b6af8afce1
Fetching contributors…

Cannot retrieve contributors at this time

85 lines (68 sloc) 2.293 kb
================================================================
nessDB v1.8 with LSM-Tree
Copyright (C) 2012 BohuTANG________________
_____________________________ __ \__ __ )
__ __ \ _ \_ ___/_ ___/_ / / /_ __ |
_ / / / __/(__ )_(__ )_ /_/ /_ /_/ /
/_/ /_/\___//____/ /____/ /_____/ /_____/
================================================================
nessDB is a fast Key-Value database(embedded), supports Redis-Protocol(PING,SET,MSET,GET,MGET,DEL,EXISTS,INFO,SHUTDOWN).
Which is written in ANSI C with BSD LICENSE and works in most POSIX systems without external dependencies.
nessDB is very efficient on disk-based random access, since it's using log-structured-merge (LSM) trees.
The 1.8 version is still under construction.
LAYOUT
======
Doc -- Documentations
bench -- Benchmark testing
engine -- The kernel of storage
server -- Database server(python)
interface -- Others binding of nessDB(python, lua)
V1.8 FEATURES
=============
a. Better performances on Random-Read/Random-Write
b. Log recovery
c. Using LSM-Tree as storage engine
d. Background detached-thread merging
e. Support billion data
For more details, please refer to documentations which in 'Doc' folder.
HOW TODO BENCHMARK
==================
$make db-bench
$./db-bench <write | read > <count>
or
$./db-bench readone <key>
If you want delete all idnexes/db/logs, you should do:
$make cleandb
HOW TO USE AS DB ENGINE
=======================
a. OPEN
struct nessdb *db = db_open(db-path, is_log_recovery);
b. ADD
struct slice sk, sv;
sk.len = 3;
sk.data = "key";
sv.len = 5;
sv.data = "value";
db_add(db, &sk, &sv);
c. DELETE
struct slice sk;
sk.len = 3;
sk.data = "key";
db_remove(db, &sk);
d. READ
struct slice sk, sv;
sk.len = 3;
sk.data = "key";
int ret = db_get(db, &sk, &sv);
if (ret == 1) {
printf("data is %s", sv.data);
free(sv.data);
} else
print("Not found");
e. CLOSE
db_close(db);
how to use as db server
=======================
See server/README
Now, you can connect it with anyone redis-client, even can use the redis-benchmark for performance testing(Note the db-server only support a few redis command).
Thanks for your attention!
Jump to Line
Something went wrong with that request. Please try again.