NashDB
This is the public implementation of NashDB, an economics-driven approach to cloud database fragmentation, replication, and provisioning. It is free software available under the AGPL-3.0 license. It implements many of the algorithms from the paper:
You can watch my presentation at SIGMOD here.
NashDB is available under the AGPL-3.0 license.
Usage
The primary entry point for the public-facing API is NashDB.java. Check out the examples and the JavaDoc comments in the NashDB class.
The NashDB class has a toJSON method that will automatically produce fragments, VM assignments, and a tuple value graph. The output looks like this:
{
"graphData": [
{
"start": 0,
"end": 1,
"value": 15
},
{
"start": 1,
"end": 2,
"value": 23
},
{
"start": 2,
"end": 3,
"value": 29
},
{
"start": 3,
"end": 4,
"value": 36
},
{
"start": 4,
"end": 5,
"value": 44
},
{
"start": 5,
"end": 6,
"value": 50
},
{
"start": 6,
"end": 7,
"value": 54
},
{
"start": 7,
"end": 8,
"value": 66
},
{
"start": 8,
"end": 9,
"value": 71
},
{
"start": 9,
"end": 10,
"value": 79
},
{
"start": 10,
"end": 11,
"value": 81
},
{
"start": 11,
"end": 12,
"value": 94
},
{
"start": 12,
"end": 13,
"value": 100
},
{
"start": 13,
"end": 14,
"value": 107
},
{
"start": 14,
"end": 15,
"value": 118
},
{
"start": 15,
"end": 16,
"value": 124
},
{
"start": 16,
"end": 17,
"value": 127
},
{
"start": 17,
"end": 18,
"value": 136
},
{
"start": 18,
"end": 19,
"value": 143
},
{
"start": 19,
"end": 20,
"value": 151
},
{
"start": 20,
"end": 21,
"value": 159
},
{
"start": 21,
"end": 22,
"value": 160
},
{
"start": 22,
"end": 23,
"value": 169
},
{
"start": 23,
"end": 24,
"value": 175
},
{
"start": 24,
"end": 25,
"value": 181
},
{
"start": 25,
"end": 26,
"value": 189
},
{
"start": 26,
"end": 27,
"value": 197
},
{
"start": 27,
"end": 28,
"value": 203
},
{
"start": 28,
"end": 29,
"value": 207
},
{
"start": 29,
"end": 30,
"value": 202
},
{
"start": 30,
"end": 31,
"value": 213
},
{
"start": 31,
"end": 32,
"value": 217
},
{
"start": 32,
"end": 33,
"value": 215
},
{
"start": 33,
"end": 34,
"value": 219
},
{
"start": 34,
"end": 35,
"value": 222
},
{
"start": 35,
"end": 36,
"value": 220
},
{
"start": 36,
"end": 37,
"value": 224
},
{
"start": 37,
"end": 38,
"value": 222
},
{
"start": 38,
"end": 39,
"value": 227
},
{
"start": 39,
"end": 40,
"value": 224
},
{
"start": 40,
"end": 41,
"value": 226
},
{
"start": 41,
"end": 42,
"value": 229
},
{
"start": 42,
"end": 43,
"value": 228
},
{
"start": 43,
"end": 44,
"value": 228
},
{
"start": 44,
"end": 45,
"value": 231
},
{
"start": 45,
"end": 46,
"value": 235
},
{
"start": 46,
"end": 47,
"value": 235
},
{
"start": 47,
"end": 48,
"value": 240
},
{
"start": 48,
"end": 49,
"value": 241
},
{
"start": 49,
"end": 50,
"value": 247
},
{
"start": 50,
"end": 51,
"value": 244
},
{
"start": 51,
"end": 52,
"value": 247
},
{
"start": 52,
"end": 53,
"value": 247
},
{
"start": 53,
"end": 54,
"value": 248
},
{
"start": 54,
"end": 55,
"value": 246
},
{
"start": 55,
"end": 56,
"value": 240
},
{
"start": 56,
"end": 57,
"value": 238
},
{
"start": 57,
"end": 58,
"value": 239
},
{
"start": 58,
"end": 59,
"value": 239
},
{
"start": 59,
"end": 60,
"value": 235
},
{
"start": 60,
"end": 61,
"value": 236
},
{
"start": 61,
"end": 62,
"value": 235
},
{
"start": 62,
"end": 63,
"value": 234
},
{
"start": 63,
"end": 64,
"value": 233
},
{
"start": 64,
"end": 65,
"value": 228
},
{
"start": 65,
"end": 66,
"value": 224
},
{
"start": 66,
"end": 67,
"value": 223
},
{
"start": 67,
"end": 68,
"value": 217
},
{
"start": 68,
"end": 69,
"value": 214
},
{
"start": 69,
"end": 70,
"value": 213
},
{
"start": 70,
"end": 71,
"value": 211
},
{
"start": 71,
"end": 72,
"value": 206
},
{
"start": 72,
"end": 73,
"value": 200
},
{
"start": 73,
"end": 74,
"value": 200
},
{
"start": 74,
"end": 75,
"value": 197
},
{
"start": 75,
"end": 76,
"value": 192
},
{
"start": 76,
"end": 77,
"value": 189
},
{
"start": 77,
"end": 78,
"value": 190
},
{
"start": 78,
"end": 79,
"value": 187
},
{
"start": 79,
"end": 80,
"value": 186
},
{
"start": 80,
"end": 81,
"value": 179
},
{
"start": 81,
"end": 82,
"value": 174
},
{
"start": 82,
"end": 83,
"value": 162
},
{
"start": 83,
"end": 84,
"value": 147
},
{
"start": 84,
"end": 85,
"value": 142
},
{
"start": 85,
"end": 86,
"value": 135
},
{
"start": 86,
"end": 87,
"value": 129
},
{
"start": 87,
"end": 88,
"value": 117
},
{
"start": 88,
"end": 89,
"value": 111
},
{
"start": 89,
"end": 90,
"value": 103
},
{
"start": 90,
"end": 91,
"value": 94
},
{
"start": 91,
"end": 92,
"value": 88
},
{
"start": 92,
"end": 93,
"value": 73
},
{
"start": 93,
"end": 94,
"value": 68
},
{
"start": 94,
"end": 95,
"value": 55
},
{
"start": 95,
"end": 96,
"value": 39
},
{
"start": 96,
"end": 97,
"value": 32
},
{
"start": 97,
"end": 98,
"value": 18
},
{
"start": 98,
"end": 99,
"value": 7
}
],
"fragments": [
{
"start": 0,
"end": 12
},
{
"start": 12,
"end": 24
},
{
"start": 24,
"end": 82
},
{
"start": 82,
"end": 92
},
{
"start": 92,
"end": 100
}
],
"vms": [
{
"fragments": [
4,
1,
3,
0,
2
]
},
{
"fragments": [
0,
4,
3,
1,
2
]
},
{
"fragments": [
1,
0,
2,
3,
4
]
},
{
"fragments": [
1,
2,
0,
3,
4
]
},
{
"fragments": [
2,
0,
3,
1,
4
]
},
{
"fragments": [
4,
0,
2,
1,
3
]
}
]
}Acknowledgments
This research was funded by NSF IIS 1253196