blocking SAVE implemented

[redis.git] / TODO

diff --git a/TODO b/TODO
index b1e8919c5c83f27e83d33d7c82537c421440390a..e46bb4a59d3b259217fd3f08400762769504c0c3 100644 (file)
--- a/TODO
+++ b/TODO
@@ -1,12 +1,49 @@
-- Protocol changes as discussed in the Redis group
-- keys expire
-- sunion ssub
-- write integers in a special way on disk (and on memory?)
-- compact types for disk storing of short strings (no 4 bytes overhead!)
-- network layer stresser in test in demo
-- maxclients directive
-- check 'server.dirty' everywere
-- replication automated tests
-- a command, or an external tool, to perform the MD5SUM of the whole dataset, so that if the dataset between two servers is identical, so will be the MD5SUM
-
-* Include Lua and Perl bindings
+Redis TODO
+----------
+
+WARNING: are you a possible Redis contributor?
+         Before implementing what is listed 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
+
+DISKSTORE TODO
+==============
+
+* Check that 00/00 and ff/ff exist at startup, otherwise exit with error.
+* Implement sync flush option, where data is written synchronously on disk when a command is executed.
+* Implement MULTI/EXEC as transaction abstract API to diskstore.c, with transaction_start, transaction_end, and a journal to recover.
+* Stop BGSAVE thread on shutdown and any other condition where the child is killed during normal bgsave.
+* Use a mutex to log on the file, so that we don't get overlapping messages, or even better make sure to use a single write against it.
+* Fix RANDOMKEY to really do something interesting
+* Fix DBSIZE to really do something interesting
+* Add a DEBUG command to check if an entry is or not in memory currently
+* Prevent io jobs from running while there is a BGSAVE thread.
+
+REPLICATION
+===========
+
+* PING between master and slave from time to time, so we can subject the
+master-slave link to timeout, and detect when the connection is gone even
+if the socket is still up.
+
+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.
+
+KNOWN BUGS
+==========
+
+* What happens in the following scenario:
+    1) We are reading an AOF file.
+    2) SETEX FOO 5 BAR
+    3) APPEND FOO ZAP
+    What happens if between 1 and 2 for some reason (system under huge load
+    or alike) too many time passes? We should prevent expires while the
+    AOF is loading.
+