Create RCP10

RCP10.md

@@ -0,0 +1,57 @@
+RCP 4 - Add "defaults" and "diff" sub-commands to config
+===
+
+```
+Author: Bill Anderson <therealbill@me.com>
+Creation date:  2016-01-27
+Update date: 2016-01-27
+Status: Open
+Version: 1.0
+Implementation: 
+```
+
+History
+---
+
+* Version 1.0 (2016-01-27): Initial version.
+
+
+Proposal 
+---
+Add two new options to the config command. The first is to enable the user to
+pull the default values for all of the configuration directives. The second is
+for pulling all directive/value pairs which are *not* the default.
+
+
+Rationale
+---
+
+Often when trying to help a user in the community, or to see what has been
+modified when troubleshooting an instance dirctly, it is very useful to see
+what has been altered or modified from the defaults. An example of a system
+which uses this is Postfix' `postconf` command which has an option to only
+display changes from default. A clear and valuable use for this would be in to
+limit the data in a config dump used for posting to StackExchange, the mailing
+list, Reddit, etc.. 
+
+For the `config defaults` sub-command this is useful for tools which manage or
+discover Redis instances. In combination with the `config diff` subcommand this
+can be very useful for tracking default changes and values across versions.
+This can be useful for users looking to upgrade their Redis version to detect
+changes which may affect their setup. This command returns what the compiled in
+defaults are - not what the current values are. Combining this with the `config
+diff` command would allow administration tools to "reset" a value to the
+default for that version of Redis, for example.
+
+
+Commands introduced
+---
+
+New Config Subcommand: 
+`CONFIG DIFF`: Returns a list of config directives which are not the defaults.
+Other than returning just the changed values it should behave and repsond like
+a `CONFIG GET *` would.
+`CONFIG GET DEFAULTS`: Returns all the *default* values for all config
+directives - regardless of any changes made.
+
+

README.md

@@ -25,3 +25,5 @@ List of RCPs
 
 1. RCP1: [Multi user AUTH with ACLs.](https://github.com/redis/redis-rcp/blob/master/RCP1.md)
 1. RCP3: [Lazy write operations](https://github.com/redis/redis-rcp/blob/master/RCP3.md)
+1. RCP4: [Sentinel Flushconfig command](https://github.com/redis/redis-rcp/blob/master/RCP4.md)
+1. RCP10: [Additional CONFIG Subcommands](https://github.com/redis/redis-rcp/blob/master/RCP10.md)