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https://github.com/BohuTANG/nessDB
A very fast transactional key-value, embedded database storage engine in Fractal-Tree. Teaching/Research purposes only.
https://github.com/BohuTANG/nessDB
fractal-tree key-value storage-engine transaction
Last synced: about 2 months ago
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A very fast transactional key-value, embedded database storage engine in Fractal-Tree. Teaching/Research purposes only.
- Host: GitHub
- URL: https://github.com/BohuTANG/nessDB
- Owner: BohuTANG
- Archived: true
- Created: 2011-06-20T07:17:30.000Z (over 13 years ago)
- Default Branch: master
- Last Pushed: 2023-10-29T19:33:22.000Z (about 1 year ago)
- Last Synced: 2024-08-01T03:31:32.103Z (4 months ago)
- Topics: fractal-tree, key-value, storage-engine, transaction
- Language: C
- Homepage:
- Size: 1.69 MB
- Stars: 898
- Watchers: 79
- Forks: 162
- Open Issues: 12
-
Metadata Files:
- Readme: README.md
- Authors: AUTHORS
Awesome Lists containing this project
- stars - BohuTANG/nessDB - value, embedded database storage engine in Fractal-Tree. Teaching/Research purposes only. (HarmonyOS / Windows Manager)
README
```
nessDB v3.0 with Buffered-Tree.
(C) 2012-2020 nessDB Authors ________________
_____________________________ __ \__ __ )
__ __ \ _ \_ ___/_ ___/_ / / /_ __ |
_ / / / __/(__ )_(__ )_ /_/ /_ /_/ /
/_/ /_/\___//____/ /____/ /_____/ /_____/
================================================================
```
nessDB is a fast Key-Value database(embedded), which is written in ANSI C with BSD LICENSE and works in most POSIX systems without external dependencies.
## FEATURES
* Buffered-Tree index data structure
* Range-Query
* Transaction
## How To Bench
Random write 10,000,000(10 Million) records with 512MB memory.
```
make db-bench
./db-bench --benchmarks=fillrandom --num=10000000 --cache_size=536870912
nessDB: version 3.0.0
Date: Sat Jun 20 19:06:42 2020
CPU: 4 * Intel(R) Core(TM) i5-7200U CPU @ 2.50GHz
CPUCache: 3072 KB
Keys: 20 bytes each
Values: 100 bytes each
Entries: 10000000
RawSize: 1144.4 MB (estimated)
Compression:Snappy
WARNING: assertions are enabled; benchmarks unnecessarily slow
------------------------------------------------------------
random write finished 10000000 ops
[ t min, t max] ops count %
--------------------------------------------------
[ 0, 1] 9998639 99.99
[ 1, 2] 92 0.00
[ 2, 3] 78 0.00
[ 3, 4] 100 0.00
[ 4, 5] 73 0.00
[ 5, 6] 60 0.00
[ 6, 7] 65 0.00
[ 7, 8] 79 0.00
[ 8, 9] 58 0.00
[ 9, 10] 58 0.00
[ 10, 12] 70 0.00
[ 12, 14] 72 0.00
[ 14, 16] 47 0.00
[ 16, 18] 35 0.00
[ 18, 20] 41 0.00
[ 20, 25] 40 0.00
[ 25, 30] 29 0.00
[ 30, 35] 24 0.00
[ 35, 40] 19 0.00
[ 40, 45] 31 0.00
[ 45, 50] 15 0.00
[ 50, 60] 42 0.00
[ 60, 70] 43 0.00
[ 70, 80] 47 0.00
[ 80, 90] 35 0.00
[ 90, 100] 39 0.00
[ 100, 120] 48 0.00
[ 120, 140] 19 0.00
[ 140, 160] 1 0.00
[ 160, 180] 1 0.00
--------------------------------------------------
total: 53514 10000000 100%
min latency : 0.000000 * 1e-3 sec/op
avg latency : 0.005351 * 1e-3 sec/op
max latency : 171.927214 * 1e-3 sec/op
avg throughput : 186866 ops/sec
```
V3.0 is still cooking.
For more work-in-process, please see TODO.