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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
VM TODO
=======
* 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.
* mmap the swap file.
* Use just a single IO Job to swap out a key, and add a mutex so that pages in the page table can be marked as used and scanned from the thread itself.
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.
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