|
1886
|
1 --- |
|
|
2 summary: Multi-backend storage module (WIP) |
|
|
3 labels: |
|
|
4 - NeedDocs |
|
|
5 ... |
|
|
6 |
|
|
7 Introduction |
|
|
8 ============ |
|
|
9 |
|
|
10 This module attemtps to provide a storage driver that is really multiple |
|
|
11 storage drivers. This could be used for storage error tolerance or |
|
|
12 caching of data in a faster storage driver. |
|
|
13 |
|
|
14 Configuration |
|
|
15 ============= |
|
|
16 |
|
|
17 An example: |
|
|
18 |
|
|
19 ``` {.lua} |
|
|
20 storage = "multi" |
|
|
21 storage_multi_policy = "all" |
|
|
22 storage_multi = { |
|
|
23 "memory", |
|
|
24 "internal", |
|
|
25 "sql" |
|
|
26 } |
|
|
27 ``` |
|
|
28 |
|
|
29 Here data would be first read from or written to [mod\_storage\_memory], |
|
|
30 then internal storage, then SQL storage. For reads, the first successful |
|
|
31 read will be used. For writes, it depends on the `storage_multi_policy` |
|
|
32 option. If set to `"all"`, then all storage backends must report success |
|
|
33 for the write to be considered successful. Other options are `"one"` and |
|
|
34 `"majority"`. |
