[redis.git] / TODO

Redis TODO and Roadmap

VERSION 1.2 TODO (Zsets, Integer encoding, Append only journal)
===============================================================

Most of the features already implemented for this release. The following is a list of the missing things in order to release the first beta tar.gz:

* For now only the last argument gets integer encoded, so make sure that: 1) every multi bulk command implemented will have the last arg that is indeed a value, and not used otherwise. 2) to explicitly call the function to encode the object in MSET and other commands where there are multiple "values".
* Man pages for SRANDMEMBER, missing Z-commands, ...
* Write docs for the "STORE" operaiton of SORT. Link to the article about SORT by written by defunkt.
* ZRANGEBYSCORE test, ZRANGEBYSCORE LIMIT option.
* Sorted sets infinity tests.

VERSION 1.4 TODO (Hash type)
============================

* Hashes (HSET, HGET, HEXISTS, HLEN, ...).
* An utility able to export an .rdb file into a text-only JSON dump, we can't live anymore without such a tool. Probably an extension to redis-cli.

VERSION 1.6 TODO (Virtual memory)
=================================

* Redis Virtual Memory for datasets bigger than RAM (http://groups.google.com/group/redis-db/msg/752997c7b38553cd)

VERSION 1.8 TODO (Fault tollerant sharding)
===========================================

* Redis-cluster, a fast intermediate layer (proxy) that implements consistent hashing and fault tollerant nodes handling.

Interesting readings about this:

    - http://ayende.com/Blog/archive/2009/04/06/designing-rhino-dht-a-fault-tolerant-dynamically-distributed-hash.aspx

VERSION 2.0 TODO (Optimizations and latency)
============================================

* Lower the CPU usage.
* Lower the RAM usage everywhere possible.
* Use epool and alike to rewrite ae.c for Linux and other platforms suppporting fater-than-select() mutiplexing APIs.
* Implement an UDP interface for low-latency GET/SET operations.

VERSION 2.2 TODO (Optimizations and latency)
============================================

* JSON command able to access data serialized in JSON format. For instance if I've a key foobar with a json object I can alter the "name" file using somthing like: "JSON SET foobar name Kevin". We should have GET and INCRBY as well.

SHORT/LONG TERM RANDOM TODO ITEMS
=================================

 * FORK command (fork()s executing the commands received by the current
   client in the new process). Hint: large SORTs can use more cores,
   copy-on-write will avoid memory problems.
 * SORT: Don't copy the list into a vector when BY argument is constant.
 * Write the hash table size of every db in the dump, so that Redis can resize the hash table just one time when loading a big DB.
 * LOCK / TRYLOCK / UNLOCK as described many times in the google group
 * Replication automated tests
 * BYTEDARRAY type
 * zmalloc() should avoid to add a private header for archs where there is some other kind of libc-specific way to get the size of a malloced block.
 * Read-only mode.
Commit	Line	Data
f284d963	1	Redis TODO and Roadmap
f284d963	2
2014c437	3	VERSION 1.2 TODO (Zsets, Integer encoding, Append only journal)
c35f7d5b	4	===============================================================
	5
	6	Most of the features already implemented for this release. The following is a list of the missing things in order to release the first beta tar.gz:
f6b141c5	7
f284d963	8	* For now only the last argument gets integer encoded, so make sure that: 1) every multi bulk command implemented will have the last arg that is indeed a value, and not used otherwise. 2) to explicitly call the function to encode the object in MSET and other commands where there are multiple "values".
f284d963	9	* Man pages for SRANDMEMBER, missing Z-commands, ...
5b2a1c29	10	* Write docs for the "STORE" operaiton of SORT. Link to the article about SORT by written by defunkt.
5b2a1c29	11	* ZRANGEBYSCORE test, ZRANGEBYSCORE LIMIT option.
5b2a1c29	12	* Sorted sets infinity tests.
23cff1a8	13
2014c437	14	VERSION 1.4 TODO (Hash type)
c35f7d5b	15	============================
23cff1a8	16
23cff1a8	17	* Hashes (HSET, HGET, HEXISTS, HLEN, ...).
cb7e07cc	18	* An utility able to export an .rdb file into a text-only JSON dump, we can't live anymore without such a tool. Probably an extension to redis-cli.
f6b141c5	19
2014c437	20	VERSION 1.6 TODO (Virtual memory)
c35f7d5b	21	=================================
7d65b33d	22
	23	* Redis Virtual Memory for datasets bigger than RAM (http://groups.google.com/group/redis-db/msg/752997c7b38553cd)
	24
2014c437	25	VERSION 1.8 TODO (Fault tollerant sharding)
c35f7d5b	26	===========================================
7d65b33d	27
c35f7d5b	28	* Redis-cluster, a fast intermediate layer (proxy) that implements consistent hashing and fault tollerant nodes handling.
7d65b33d	29
5b2a1c29	30	Interesting readings about this:
	31
	32	- http://ayende.com/Blog/archive/2009/04/06/designing-rhino-dht-a-fault-tolerant-dynamically-distributed-hash.aspx
	33
2014c437	34	VERSION 2.0 TODO (Optimizations and latency)
c35f7d5b	35	============================================
7d65b33d	36
	37	* Lower the CPU usage.
	38	* Lower the RAM usage everywhere possible.
	39	* Use epool and alike to rewrite ae.c for Linux and other platforms suppporting fater-than-select() mutiplexing APIs.
	40	* Implement an UDP interface for low-latency GET/SET operations.
	41
2014c437	42	VERSION 2.2 TODO (Optimizations and latency)
	43	============================================
	44
	45	* JSON command able to access data serialized in JSON format. For instance if I've a key foobar with a json object I can alter the "name" file using somthing like: "JSON SET foobar name Kevin". We should have GET and INCRBY as well.
	46
c35f7d5b	47	SHORT/LONG TERM RANDOM TODO ITEMS
c35f7d5b	48	=================================
f6b141c5	49
2014c437	50	* FORK command (fork()s executing the commands received by the current
	51	client in the new process). Hint: large SORTs can use more cores,
	52	copy-on-write will avoid memory problems.
d214bb48	53	* SORT: Don't copy the list into a vector when BY argument is constant.
391b4a60	54	* Write the hash table size of every db in the dump, so that Redis can resize the hash table just one time when loading a big DB.
391b4a60	55	* LOCK / TRYLOCK / UNLOCK as described many times in the google group
391b4a60	56	* Replication automated tests
7d65b33d	57	* BYTEDARRAY type
ec93bba3	58	* zmalloc() should avoid to add a private header for archs where there is some other kind of libc-specific way to get the size of a malloced block.
9d65a1bb	59	* Read-only mode.