X-Git-Url: https://git.saurik.com/redis.git/blobdiff_plain/f6bea06f74d4f065b5f8e4680792266eb97d7582..469c4e45c3d64a6331249c17b953d928a672b692:/TODO?ds=sidebyside diff --git a/TODO b/TODO index 74f13347..7a9b7074 100644 --- a/TODO +++ b/TODO @@ -1,38 +1,26 @@ Redis TODO and Roadmap +---------------------- -VERSION 1.4 TODO (Hash type) -============================ - -* Blocking LPOP (BLPOP). -* Hashes (HSET, HGET, HEXISTS, HLEN, ...). -* List ops like L/RPUSH L/RPOP should return the new list length. - -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) +VERSION 2.2 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. +* Specially encoded Sets (like Hashes). +* Implement an UDP interface for low-latency operations. +* What about a special coding that is about storing the "rdb" serialized format instead of the actual value? This can be used when we have LRU in order to super-compress data into memory, for data not accessed frequetly. It's a VM-alike strategy but fully in memory, may reduce the space to hold some dataset in an impressive way. Trivial to implement. -VERSION 2.2 TODO (Optimizations and latency) -============================================ +VERSION 2.x TODO +================ + +* BRPOPLPUSH +* Save dataset / fsync() on SIGTERM +* Change the implementation of ZCOUNT to use the augmented skiplist in order to be much faster. -* 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. +Virtual Memory optimizations: +* 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. +* Implement LEN, PEEK, POKE, SETBIT, GETBIT OTHER IMPORTANT THINGS THAT WILL BE ADDED BUT I'M NOT SURE WHEN =============================================================== @@ -45,10 +33,14 @@ BIG ONES: SMALL ONES: +* 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. THE "MAYBE" TODO LIST: things that may or may not get implemented =================================================================