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1Redis TODO and Roadmap
2----------------------
3
4VERSION 2.2 TODO (Optimizations and latency)
5============================================
6
7* Support for syslog(3).
8* Change the implementation of ZCOUNT to use the augmented skiplist in order to be much faster.
9* Add an explicit test for MULTI/EXEC reloaded in the AOF.
10* Command table -> hash table, with support for command renaming
11
12VM TODO
13=======
14
15* Use multiple open FDs against the VM file, one for thread.
16* Check what happens performance-wise if instead of creating threads again and again the same threads are reused forever. Note: this requires a way to disable this clients in the child, but waiting for empty new jobs queue can be enough.
17
18STRING COMMANDS
19===============
20
21* Implement STRLEN, PEEK, POKE, SETBIT, GETBIT
22
23OTHER IMPORTANT THINGS THAT WILL BE ADDED BUT I'M NOT SURE WHEN
24===============================================================
25
26BIG ONES:
27
28* BRPOPLPUSH
29* Specially encoded memory-saving integer sets.
30* A command to export a JSON dump (there should be mostly working patch needing major reworking).
31* Specially encoded sets of integers (this includes a big refactoring providing an higher level layer for Sets manipulation)
32
33SMALL ONES:
34
35* If sizeof(double) == sizeof(void*) we could store the double value of sorted sets directly in place of the pointer instead of allocating it in the heap.
36* Delete on writes against expire policy should only happen after argument parsing for commands doing their own arg parsing stuff.
37* Give errors when incrementing a key that does not look like an integer, when providing as a sorted set score something can't be parsed as a double, and so forth.
38* MSADD (n keys) (n values). See this thread in the Redis google group: http://groups.google.com/group/redis-db/browse_thread/thread/e766d84eb375cd41
39* Don't save empty lists / sets / zsets on disk with snapshotting.
40* Remove keys when a list / set / zset reaches length of 0.
41* An option to exec a command slave-side if the master connection is lost: even cooler: if the script returns "0" the slave elects itself as master, otherwise continue trying to reconnect.
42* PING the master from time to time to check if it's gone.
43
44THE "MAYBE" TODO LIST: things that may or may not get implemented
45=================================================================
46
47Most of this can be seen just as proposals, the fact they are in this list
48it's not a guarantee they'll ever get implemented ;)
49
50* SORT: Don't copy the list into a vector when BY argument is constant.
51* 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.
52* Byte Array type (BA prefixed commands): BASETBIT BAGETBIT BASETU8 U16 U32 U64 S8 S16 S32 S64, ability to atomically INCRBY all the base types. BARANGE to get a range of bytes as a bulk value, BASETRANGE to set a range of bytes.
53* Read-only mode.
54* Kill the delete-on-write behavior of expires, replicating DELs
55* Multiple BY in SORT.
56
57KNOWN BUGS
58==========
59
60* LRANGE and other commands are using 32 bit integers for ranges, and overflows are not detected. So LRANGE mylist 0 23498204823094823904823904 will have random effects.
61
62REDIS CLI TODO
63==============
64
65* Computer parsable output generation
66* Memoize return values so that they can be used later as arguments, like $1