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mod_storage_multi/README.markdown @ 2882:6f289283feb1
mod_firewall: Prevent traceback if no directed presence has been sent (fixes #1081)
author | Kim Alvefur <zash@zash.se> |
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date | Fri, 16 Feb 2018 07:54:35 +0100 (2018-02-16) |
parent | 1887:a7fdab9c14e2 |
rev | line source |
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1886 | 1 --- |
2 summary: Multi-backend storage module (WIP) | |
3 labels: | |
4 - NeedDocs | |
1887
a7fdab9c14e2
mod_storage_multi: Put in Alpha stage
Kim Alvefur <zash@zash.se>
parents:
1886
diff
changeset
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5 - Stage-Alpha |
1886 | 6 ... |
7 | |
8 Introduction | |
9 ============ | |
10 | |
11 This module attemtps to provide a storage driver that is really multiple | |
12 storage drivers. This could be used for storage error tolerance or | |
13 caching of data in a faster storage driver. | |
14 | |
15 Configuration | |
16 ============= | |
17 | |
18 An example: | |
19 | |
20 ``` {.lua} | |
21 storage = "multi" | |
22 storage_multi_policy = "all" | |
23 storage_multi = { | |
24 "memory", | |
25 "internal", | |
26 "sql" | |
27 } | |
28 ``` | |
29 | |
30 Here data would be first read from or written to [mod\_storage\_memory], | |
31 then internal storage, then SQL storage. For reads, the first successful | |
32 read will be used. For writes, it depends on the `storage_multi_policy` | |
33 option. If set to `"all"`, then all storage backends must report success | |
34 for the write to be considered successful. Other options are `"one"` and | |
35 `"majority"`. |