X-Git-Url: https://git.saurik.com/redis.git/blobdiff_plain/80181f7848a26f6763d1d106e2b91dff9b53bfc8..aaada3f962a9f87fb239e55e3d26c1e794d411d5:/TODO diff --git a/TODO b/TODO index a62743ea..830149b3 100644 --- a/TODO +++ b/TODO @@ -1,58 +1,66 @@ Redis TODO and Roadmap +---------------------- -VERSION 1.2 TODO (Zsets, Integer encoding, Append only journal) -=============================================================== +VERSION 2.2 TODO (Optimizations and latency) +============================================ -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: +* Support for syslog(3). +* Change the implementation of ZCOUNT to use the augmented skiplist in order to be much faster. +* Add an explicit test for MULTI/EXEC reloaded in the AOF. +* Command table -> hash table, with support for command renaming -* 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 LIMIT option and test. -* check the command table for deny on OOM correctness. +VM TODO +======= -VERSION 1.4 TODO (Hash type) -============================ +* Use multiple open FDs against the VM file, one for thread. +* 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. -* 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. +STRING COMMANDS +=============== -VERSION 1.6 TODO (Virtual memory) -================================= +* Implement STRLEN, PEEK, POKE, SETBIT, GETBIT -* Redis Virtual Memory for datasets bigger than RAM (http://groups.google.com/group/redis-db/msg/752997c7b38553cd) +OTHER IMPORTANT THINGS THAT WILL BE ADDED BUT I'M NOT SURE WHEN +=============================================================== -VERSION 1.8 TODO (Fault tollerant sharding) -=========================================== +BIG ONES: -* Redis-cluster, a fast intermediate layer (proxy) that implements consistent hashing and fault tollerant nodes handling. +* BRPOPLPUSH +* Specially encoded memory-saving integer sets. +* A command to export a JSON dump (there should be mostly working patch needing major reworking). +* Specially encoded sets of integers (this includes a big refactoring providing an higher level layer for Sets manipulation) -Interesting readings about this: +SMALL ONES: - - http://ayende.com/Blog/archive/2009/04/06/designing-rhino-dht-a-fault-tolerant-dynamically-distributed-hash.aspx +* 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. +* Delete on writes against expire policy should only happen after argument parsing for commands doing their own arg parsing stuff. +* 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. +* MSADD (n keys) (n values). See this thread in the Redis google group: http://groups.google.com/group/redis-db/browse_thread/thread/e766d84eb375cd41 +* Don't save empty lists / sets / zsets on disk with snapshotting. +* Remove keys when a list / set / zset reaches length of 0. +* 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. +* PING the master from time to time to check if it's gone. -VERSION 2.0 TODO (Optimizations and latency) -============================================ +THE "MAYBE" TODO LIST: things that may or may not get implemented +================================================================= -* 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. +Most of this can be seen just as proposals, the fact they are in this list +it's not a guarantee they'll ever get implemented ;) -VERSION 2.2 TODO (Optimizations and latency) -============================================ +* 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. +* 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. +* Read-only mode. +* Kill the delete-on-write behavior of expires, replicating DELs +* Multiple BY in SORT. + +KNOWN BUGS +========== + +* 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. + +REDIS CLI TODO +============== -* 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. +* Computer parsable output generation +* Memoize return values so that they can be used later as arguments, like $1