Also force SIGSEGV without HAVE_BACKTRACE

[redis.git] / TODO

diff --git a/TODO b/TODO
index a8108a7aaf7ec82d46773c142fff74a5a47d0e98..145ec5243e93a72686067cb180441b583d06f27f 100644 (file)
--- a/TODO
+++ b/TODO
@@ -1,24 +1,45 @@
-BEFORE REDIS 1.0.0-rc1
+Redis TODO
+----------
 
-- GETSET
-- Fix pure-PHP lib version 4 for the new protocol
-- persistent expires
-- network layer stresser in test in demo
-- maxclients directive
-- check 'server.dirty' everywere
-- replication automated tests
-- replication non stopping master<->slave syncronization
-- an external tool able to perform the 'difference' between two Redis servers. It's like 'diff', but against Redis servers, and the output is the set of commands needed to turn the first server into the second, suitable to be sent via netcat.
+WARNING: are you a possible Redis contributor?
+         Before implementing what is listed in this file
+         please drop a message in the Redis google group or chat with
+         antirez or pietern on irc.freenode.org #redis to check if the work
+         is already in progress and if the feature is still interesting for
+         us, and *how* exactly this can be implemented to have good changes
+         of a merge. Otherwise it is probably wasted work! Thank you
 
-   $ ./redis-diff 192.168.1.1 192.168.1.2 > diff.txt
-   $ cat diff.txt | nc 192.168.1.1 6379
-   $ ./redis-diff 192.168.1.1 192.168.1.2
-   $ # No output now the servers are identical
 
-This command should be smart and don't use too much memory, that is, take two connections at the same time against the two servers and perform the comparison key by key. Probably the initial "KEYS *" is unavoidable.
+CLUSTER
+=======
 
-- objects sharing configuration, add the directive "objectsharingpool <size>"
+* Implement rehashing and cluster check in redis-trib.
+* Reimplement MIGRATE / RESTORE to use just in memory buffers (no disk at
+  all). This will require touching a lot of the RDB stuff around, but we may
+  hand with faster persistence for RDB.
+* Implement the slave nodes semantics and election.
+* Allow redis-trib to create a cluster-wide snapshot (using SYNC).
+* Allow redis-trib to restore a cluster-wide snapshot (implement UPLOAD?).
 
-FUTURE HINTS
+SCRIPTING
+=========
 
-- if in-memory values compression will be implemented, make sure to implement this so that addReply() is able to handle compressed objects, just creating an uncompressed version on the fly and adding this to the output queue instead of the original one. When insetad we need to look at the object string value (SORT BY for example), call a function that will turn the object into an uncompresed one.
+* SCRIPT FLUSH or alike to start a fresh interpreter?
+
+OPTIMIZATIONS
+=============
+
+* 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.
+* Read-only mode for slaves.
+* Redis big lists as linked lists of small ziplists?
+  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.
+
+KNOWN BUGS
+==========
+
+* #519: Slave may have expired keys that were never read in the master (so a DEL
+  is not sent in the replication channel) but are already expired since
+  a lot of time. Maybe after a given delay that is undoubtably greater than
+  the replication link latency we should expire this key on the slave on
+  access?