86 lines
3.4 KiB
Plaintext
86 lines
3.4 KiB
Plaintext
Redis TODO
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----------
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WARNING: are you a possible Redis contributor?
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Before implementing what is listed what is listed in this file
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please drop a message in the Redis google group or chat with
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antirez or pietern on irc.freenode.org #redis to check if the work
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is already in progress and if the feature is still interesting for
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us, and *how* exactly this can be implemented to have good changes
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of a merge. Otherwise it is probably wasted work! Thank you
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API CHANGES
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===========
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* Turn commands into variadic versions when it makes sense, that is, when
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the variable number of arguments represent values, and there is no conflict
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with the return value of the command.
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CLUSTER
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=======
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* Implement rehashing and cluster check in redis-trib.
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* Reimplement MIGRATE / RESTORE to use just in memory buffers (no disk at
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all). This will require touching a lot of the RDB stuff around, but we may
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hand with faster persistence for RDB.
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* Implement the slave nodes semantics and election.
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* Allow redis-trib to create a cluster-wide snapshot (using SYNC).
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* Allow redis-trib to restore a cluster-wide snapshot (implement UPLOAD?).
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APPEND ONLY FILE
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================
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* in AOF rewirte use HMSET to rewrite small hashes instead of multiple calls
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to HSET.
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OPTIMIZATIONS
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=============
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* Avoid COW due to incrementing the dict iterators counter.
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* SORT: Don't copy the list into a vector when BY argument is constant.
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* 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.
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* Read-only mode for slaves.
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* Redis big lists as linked lists of small ziplists?
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Possibly a simple heuristic that join near nodes when some node gets smaller than the low_level, and split it into two if gets bigger than high_level.
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REPORTING
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=========
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* Better INFO output with sections.
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RANDOM
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======
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* Clients should be closed as far as the output buffer list is bigger than a given number of elements (configurable in redis.conf)
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* Should the redis default configuration, and the default redis.conf, just bind 127.0.0.1?
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KNOWN BUGS
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==========
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* What happens in the following scenario:
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1) We are reading an AOF file.
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2) SETEX FOO 5 BAR
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3) APPEND FOO ZAP
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What happens if between 1 and 2 for some reason (system under huge load
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or alike) too many time passes? We should prevent expires while the
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AOF is loading.
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* #519: Slave may have expired keys that were never read in the master (so a DEL
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is not sent in the replication channel) but are already expired since
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a lot of time. Maybe after a given delay that is undoubltly greater than
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the replication link latency we should expire this key on the slave on
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access?
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DISKSTORE TODO
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==============
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* Fix FLUSHALL/FLUSHDB: the queue of pending reads/writes should be handled.
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* Check that 00/00 and ff/ff exist at startup, otherwise exit with error.
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* Implement sync flush option, where data is written synchronously on disk when a command is executed.
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* Implement MULTI/EXEC as transaction abstract API to diskstore.c, with transaction_start, transaction_end, and a journal to recover.
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* Stop BGSAVE thread on shutdown and any other condition where the child is killed during normal bgsave.
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* Fix RANDOMKEY to really do something interesting
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* Fix DBSIZE to really do something interesting
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* Add a DEBUG command to check if an entry is or not in memory currently
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* dscache.c near 236, kobj = createStringObject... we could use static obj.
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