cachedb_sql Module

List of Tables

3.1. Top contributors by DevScore⁽¹⁾, authored commits⁽²⁾ and lines added/removed⁽³⁾
3.2. Most recently active contributors⁽¹⁾ to this module

List of Examples

1.1. Set db_url parameter
1.2. Usage example
1.3. Set db_url parameter
1.4. Set key_column parameter
1.5. Set value_column parameter
1.6. Set counter_column parameter
1.7. Set expires_column parameter
1.8. Set cache_clean_period parameter

Chapter 1. Admin Guide

1.1. Overview

This module is an implementation of a cache system designed to work with a regular SQL-based server. It uses the internal DB interface to connect to the back-end, and also implements the Key-Value interface exported from the core.

1.2. Advantages

memory costs are no longer on the server
the cache is 100% persistent. A restart of OpenSIPS server will not affect the DB. The DB is also persistent so it can also be restarted without loss of information.
Multiple OpenSIPS instances can easily share key-value information via a regular SQL-based database

1.3. Limitations

The module's counter operations ( ADD and SUB ) are currently only supported by MySQL

1.4. Dependencies

1.4.1. OpenSIPS Modules

None.

1.4.2. External Libraries or Applications

The following libraries or applications must be installed before running OpenSIPS with this module loaded:

none:

1.5. Exported Parameters

1.5.1. `cachedb_url` (string)

The url of the Database that OpenSIPS will connect to in order to use the from script cache_store,cache_fetch, etc operations.

The format to follow is : sql:[conn_id]-dburl

The parameter can be set multiple times to create multiple connections accessible from the OpenSIPS script.

Example 1.1. Set db_url parameter

...
modparam("cachedb_sql", "cachedb_url", "sql:1st-mysql://root:vlad@localhost/opensips_sql")
...

Example 1.2. Usage example

...
modparam("cachedb_sql", "cachedb_url", "sql:1st-mysql://root:vlad@localhost/opensips_sql")
modparam("cachedb_sql", "cachedb_url", "sql:2nd-postgres://root:vlad@localhost/opensips_pg")
...
...
cache_store("sql:1st-mysql","key","$ru value");
cache_store("sql:2nd-postgres","counter","10");
...

1.5.2. `db_table` (string)

The table of the Database that OpenSIPS will connect to in order to use the from script cache_store,cache_fetch, etc operations.

Example 1.3. Set db_url parameter

...
modparam("cachedb_sql", "db_table","my_table");
...

1.5.3. `key_column` (string)

The column where the key will be stored

Example 1.4. Set key_column parameter

...
modparam("cachedb_sql", "key_column","some_name");
...

1.5.4. `value_column` (string)

The column where the value will be stored

Example 1.5. Set value_column parameter

...
modparam("cachedb_sql", "value_column","some_name");
...

1.5.5. `counter_column` (string)

The column where the counter value will be stored

Example 1.6. Set counter_column parameter

...
modparam("cachedb_sql", "counter_column","some_name");
...

1.5.6. `expires_column` (string)

The column where the expires will be stored

Example 1.7. Set expires_column parameter

...
modparam("cachedb_sql", "expires_column","some_name");
...

1.5.7. `cache_clean_period` (int)

The interval in seconds at which the expired keys will be removed from the database. Default value is 60 ( seconds )

Example 1.8. Set cache_clean_period parameter

...
modparam("cachedb_sql", "cache_clean_period",10);
...

1.5.8. Exported Functions

The module does not export functions to be used in configuration script.

Chapter 2. Frequently Asked Questions

2.1.	What happened with the old “db_url” module parameter?
	It was replaced with the “cachedb_url” parameter. See the documentation for the usage of the “cachedb_url” parameter.

Chapter 3. Contributors

3.1. By Commit Statistics

Table 3.1. Top contributors by DevScore⁽¹⁾, authored commits⁽²⁾ and lines added/removed⁽³⁾

	Name	DevScore	Commits	Lines ++	Lines --
1.	Vlad Paiu (@vladpaiu)	15	5	1001	87
2.	Liviu Chircu (@liviuchircu)	11	8	41	58
3.	Razvan Crainea (@razvancrainea)	7	5	4	2
4.	Bogdan-Andrei Iancu (@bogdan-iancu)	5	3	4	2
5.	Dusan Klinec (@ph4r05)	3	1	2	2
6.	Julián Moreno Patiño	3	1	2	2
7.	Vlad Patrascu (@rvlad-patrascu)	2	1	1	0

(1) DevScore = author_commits + author_lines_added / (project_lines_added / project_commits) + author_lines_deleted / (project_lines_deleted / project_commits)

(2) including any documentation-related commits, excluding merge commits. Regarding imported patches/code, we do our best to count the work on behalf of the proper owner, as per the "fix_authors" and "mod_renames" arrays in opensips/doc/build-contrib.sh. If you identify any patches/commits which do not get properly attributed to you, please submit a pull request which extends "fix_authors" and/or "mod_renames".

(3) ignoring whitespace edits, renamed files and auto-generated files

3.2. By Commit Activity

Table 3.2. Most recently active contributors⁽¹⁾ to this module

	Name	Commit Activity
1.	Razvan Crainea (@razvancrainea)	Aug 2015 - Sep 2019
2.	Liviu Chircu (@liviuchircu)	Mar 2014 - Nov 2018
3.	Bogdan-Andrei Iancu (@bogdan-iancu)	Oct 2014 - Jun 2018
4.	Vlad Patrascu (@rvlad-patrascu)	May 2017 - May 2017
5.	Julián Moreno Patiño	Feb 2016 - Feb 2016
6.	Dusan Klinec (@ph4r05)	Dec 2015 - Dec 2015
7.	Vlad Paiu (@vladpaiu)	Jan 2013 - May 2014

(1) including any documentation-related commits, excluding merge commits

Chapter 4. Documentation

4.1. Contributors

Last edited by: Bogdan-Andrei Iancu (@bogdan-iancu), Liviu Chircu (@liviuchircu), Julián Moreno Patiño, Vlad Paiu (@vladpaiu).