1Redis 2.6 release notes 2 3Migrating from 2.4 to 2.6 4========================= 5 6Redis 2.4 is mostly a strict subset of 2.6. However there are a few things 7that you should be aware of: 8 9* You can't use .rdb and AOF files generated with 2.6 into a 2.4 instance. 10* 2.6 slaves can be attached to 2.4 masters, but not the contrary, and only 11 for the time needed to perform the version upgrade. 12 13There are also a few API differences, that are unlikely to cause problems, 14but it is better to keep them in mind: 15 16* SORT now will refuse to sort in numerical mode elements that can't be parsed 17 as numbers. 18* EXPIREs now all have millisecond resolution (but this is very unlikely to 19 break code that was not conceived exploting the previous resolution error 20 in some way.) 21* INFO output is a bit different now, and contains empty lines and comments 22 starting with '#'. All the major clients should be already fixed to work 23 with the new INFO format. 24 25Also the following redis.conf and CONFIG GET / SET parameters changed name: 26 27 * hash-max-zipmap-entries, now replaced by hash-max-ziplist-entries 28 * hash-max-zipmap-value, now replaced by hash-max-ziplist-value 29 * glueoutputbuf was no completely removed as it does not make sense 30 31--------- 32CHANGELOG 33--------- 34 35What's new in Redis 2.6.0 36========================= 37 38UPGRADE URGENCY: We suggest new users to start with 2.6.0, and old users to 39 upgrade after some testing of the application with the new 40 Redis version. 41 42* Server side Lua scripting, see http://redis.io/commands/eval 43* Virtual Memory removed (was deprecated in 2.4) 44* Hardcoded limits about max number of clients removed. 45* AOF low level semantics is generally more sane, and especially when used 46 in slaves. 47* Milliseconds resolution expires, also added new commands with milliseconds 48 precision (PEXPIRE, PTTL, ...). 49* Clinets max output buffer soft and hard limits. You can specifiy different 50 limits for different classes of clients (normal,pubsub,slave). 51* AOF is now able to rewrite aggregate data types using variadic commands, 52 often producing an AOF that is faster to save, load, and is smaller in size. 53* Every redis.conf directive is now accepted as a command line option for the 54 redis-server binary, with the same name and number of arguments. 55* Hash table seed randomization for protection against collisions attacks. 56* Performances improved when writing large objects to Redis. 57* Significant parts of the core refactored or rewritten. New internal APIs 58 and core changes allowed to develop Redis Cluster on top of the new code, 59 however for 2.6 all the cluster code was removed, and will be released with 60 Redis 3.0 when it is more complete and stable. 61* Redis ASCII art logo added at startup. 62* Crash report on memory violation or failed asserts improved significantly 63 to make debugging of hard to catch bugs simpler. 64* redis-benchmark improvements: ability to run selected tests, 65 CSV output, faster, better help. 66* redis-cli improvements: --eval for comfortable development of Lua scripts. 67* SHUTDOWN now supports two optional arguments: "SAVE" and "NOSAVE". 68* INFO output split into sections, the command is now able to just show 69 pecific sections. 70* New statistics about how many time a command was called, and how much 71 execution time it used (INFO commandstats). 72* More predictable SORT behavior in edge cases. 73* INCRBYFLOAT and HINCRBYFLOAT commands. 74 75-------------------------------------------------------------------------------- 76 77Credits: Where not specified the implementation and design are done by 78Salvatore Sanfilippo and Pieter Noordhuis. Thanks to VMware for making all 79this possible. Also many thanks to all the other contributors and the amazing 80community we have. 81 82See commit messages for more credits. 83 84Cheers, 85Salvatore 86