Mercurial > prosody-modules

annotate mod_storage_appendmap/README.markdown @ 4554:025cf93acfe9

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
mod_measure_process: Provide metrics about the process itself
author Jonas Schäfer <jonas@wielicki.name>
date Wed, 28 Apr 2021 08:21:54 +0200
parents 88474dd1af48
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2061
b84284144e21 mod_storage_appendmap: Experimental storage module optimized for map stores
Kim Alvefur <zash@zash.se>
parents:
diff changeset
1 ---
b84284144e21 mod_storage_appendmap: Experimental storage module optimized for map stores
Kim Alvefur <zash@zash.se>
parents:
diff changeset
2 labels:
b84284144e21 mod_storage_appendmap: Experimental storage module optimized for map stores
Kim Alvefur <zash@zash.se>
parents:
diff changeset
3 - 'Stage-Alpha'
b84284144e21 mod_storage_appendmap: Experimental storage module optimized for map stores
Kim Alvefur <zash@zash.se>
parents:
diff changeset
4 - 'Type-Storage'
b84284144e21 mod_storage_appendmap: Experimental storage module optimized for map stores
Kim Alvefur <zash@zash.se>
parents:
diff changeset
5 summary: Experimental map store optimized for small incremental changes
b84284144e21 mod_storage_appendmap: Experimental storage module optimized for map stores
Kim Alvefur <zash@zash.se>
parents:
diff changeset
6 ...
b84284144e21 mod_storage_appendmap: Experimental storage module optimized for map stores
Kim Alvefur <zash@zash.se>
parents:
diff changeset
7
b84284144e21 mod_storage_appendmap: Experimental storage module optimized for map stores
Kim Alvefur <zash@zash.se>
parents:
diff changeset
8 This is an experimental storage driver where changed data is appended.
b84284144e21 mod_storage_appendmap: Experimental storage module optimized for map stores
Kim Alvefur <zash@zash.se>
parents:
diff changeset
9 Data is simply written as `key = value` pairs to the end of the file.
b84284144e21 mod_storage_appendmap: Experimental storage module optimized for map stores
Kim Alvefur <zash@zash.se>
parents:
diff changeset
10 This allows changes to individual keys to be written without needing to
b84284144e21 mod_storage_appendmap: Experimental storage module optimized for map stores
Kim Alvefur <zash@zash.se>
parents:
diff changeset
11 write out the entire object again, but reads would grow gradually larger
b84284144e21 mod_storage_appendmap: Experimental storage module optimized for map stores
Kim Alvefur <zash@zash.se>
parents:
diff changeset
12 as it still needs to read old overwritten keys. This may be suitable for
2818
88474dd1af48 Various READMEs: s/eg/e.g.g/
Kim Alvefur <zash@zash.se>
parents: 2061
diff changeset
13 e.g. rosters where individual contacts are changed at a time. In theory,
2061
b84284144e21 mod_storage_appendmap: Experimental storage module optimized for map stores
Kim Alvefur <zash@zash.se>
parents:
diff changeset
14 this could also allow rolling back changes.
b84284144e21 mod_storage_appendmap: Experimental storage module optimized for map stores
Kim Alvefur <zash@zash.se>
parents:
diff changeset
15
b84284144e21 mod_storage_appendmap: Experimental storage module optimized for map stores
Kim Alvefur <zash@zash.se>
parents:
diff changeset
16 Requires 0.10