BohuTANG / Nessdb
A very fast transactional key-value, embedded database storage engine in Fractal-Tree. Teaching/Research purposes only.
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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.
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