in order to use a lot less memory while the saving child process is performing
a BGREWRITEAOF or a BGSAVE, so handle with care for a couple of weeks.
+Oh, and I've some very good news: the majority of apps can work if you simply replace 2.2 in your old 2.0 environment. I can't think of any breakage.
+
WHAT'S NEW IN REDIS 2.2.x
* Specially encoded data types, small lists and sets can now use up to an order of magnitude less memory.
* Endless other CPU optimizations and bugs fixed.
Credits: Where not specified the implementation and design are done by Salvatore Sanfilippo and Pieter Noordhuis. Thanks to VMware for making all this possible. Also many thanks to all the other contributors and the amazing community we have.
+
+Cheers,
+Salvatore