hash table example commented out in dict.c

[redis.git] / TODO

diff --git a/TODO b/TODO
index b7d139e9e9e0276c2304540333fbfa3242092285..830149b30d90f286b0e193bdbb98b7386f94876e 100644 (file)
--- a/TODO
+++ b/TODO
@@ -5,30 +5,27 @@ VERSION 2.2 TODO (Optimizations and latency)
 ============================================
 
 * Support for syslog(3).
 ============================================
 
 * Support for syslog(3).

-* Lower the CPU usage.
-* Lower the RAM usage everywhere possible.
-* 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.
-* Another idea: LRU does not need to be super precise right? Maybe it's a good idea to just put into the skiplist implementing the LRU just the pointer to the key without evne incr/decr business, nor the need to remove the pointer when the key is deleted. There is to think more about that.
-
-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.
 * 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
+
+VM TODO
+=======

 
 

-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.
 * 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
+
+STRING COMMANDS
+===============
+
+* Implement STRLEN, PEEK, POKE, SETBIT, GETBIT

 
 OTHER IMPORTANT THINGS THAT WILL BE ADDED BUT I'M NOT SURE WHEN
 ===============================================================
 
 BIG ONES:
 
 
 OTHER IMPORTANT THINGS THAT WILL BE ADDED BUT I'M NOT SURE WHEN
 ===============================================================
 
 BIG ONES:
 

+* 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)
 * 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)


@@ -50,23 +47,20 @@ THE "MAYBE" TODO LIST: things that may or may not get implemented
 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 ;)
 
 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 ;)
 

-* Move dict.c from hash table to skip list, in order to avoid the blocking resize operation needed for the hash table.
-* 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.
-* DUP command? DUP srckey dstkey, creates an exact clone of srckey value in dstkey.

 * 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.
 * 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

 * 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.
 * 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.

-* 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. Already done for Mac OS X.

 * Read-only mode.
 * Read-only mode.

-* Pattern-matching replication.
-* Add an option to relax the delete-expiring-keys-on-write semantic *denying* replication and AOF when this is on? Can be handy sometimes, when using Redis for non persistent state, but can create problems. For instance should rename and move also "move" the timeouts? How does this affect other commands?
+* 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.
 * 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
+==============
+
+* Computer parsable output generation
+* Memoize return values so that they can be used later as arguments, like $1