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1 | Redis 2.6 release notes |
2 | |
3 | Migrating from 2.4 to 2.6 |
4 | ========================= |
5 | |
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6 | Redis 2.4 is mostly a strict subset of 2.6. However there are a few things |
7 | that you should be aware of: |
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8 | |
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9 | * You can't use .rdb and AOF files generated with 2.6 into a 2.4 instance. |
10 | * 2.4 slaves can be attached to 2.6 masters, but not the contrary, and only |
11 | for the time needed to perform the version upgrade. |
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12 | |
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13 | There are also a few API differences, that are unlikely to cause problems, |
14 | but it is better to keep them in mind: |
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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 |
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22 | starting with '#'. All the major clients should be already fixed to work |
23 | with the new INFO format. |
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24 | * Slaves are only read-only by default (but you can change this easily |
25 | setting the "slave-read-only" configuration option to "no" editing your |
26 | redis.conf or using CONFIG SET. |
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27 | |
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28 | Also the following redis.conf and CONFIG GET / SET parameters changed name: |
29 | |
30 | * hash-max-zipmap-entries, now replaced by hash-max-ziplist-entries |
31 | * hash-max-zipmap-value, now replaced by hash-max-ziplist-value |
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32 | * glueoutputbuf option was now completely removed (was deprecated) |
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33 | |
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34 | --------- |
35 | CHANGELOG |
36 | --------- |
37 | |
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38 | What's new in Redis 2.5.8 (aka 2.6 Release Candidate 2) |
39 | ======================================================= |
40 | |
41 | UPGRADE URGENCY: high for all the users of the KEYS command, otherwise low. |
42 | |
43 | * [BUGFIX] Fix for KEYS command: if the DB contains keys with expires the KEYS |
44 | command may return the wrong output, having duplicated or missing |
45 | keys. See issue #487 and #488 on github for details. |
46 | |
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47 | What's new in Redis 2.5.7 (aka 2.6 Release Candidate 1) |
48 | ======================================================= |
49 | |
50 | UPGRADE URGENCY: upgrade not recommended because this is an RC release. |
51 | |
52 | * This is the first release candidate for Redis 2.6. We are not aware of |
53 | bugs, but part of this code is young and was never tested in production |
54 | environments, so handle with care. |
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55 | |
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56 | An overview of new features and changes in Redis 2.6.x |
57 | ====================================================== |
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58 | |
59 | * Server side Lua scripting, see http://redis.io/commands/eval |
60 | * Virtual Memory removed (was deprecated in 2.4) |
61 | * Hardcoded limits about max number of clients removed. |
62 | * AOF low level semantics is generally more sane, and especially when used |
63 | in slaves. |
64 | * Milliseconds resolution expires, also added new commands with milliseconds |
65 | precision (PEXPIRE, PTTL, ...). |
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66 | * Better memory usage for "small" lists, ziplists and hashes when fields or |
67 | values contain small integers. |
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68 | * Read only slaves. |
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69 | * Clients max output buffer soft and hard limits. You can specifiy different |
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70 | limits for different classes of clients (normal,pubsub,slave). |
71 | * AOF is now able to rewrite aggregate data types using variadic commands, |
72 | often producing an AOF that is faster to save, load, and is smaller in size. |
73 | * Every redis.conf directive is now accepted as a command line option for the |
74 | redis-server binary, with the same name and number of arguments. |
75 | * Hash table seed randomization for protection against collisions attacks. |
76 | * Performances improved when writing large objects to Redis. |
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77 | * Integrated memory test, see redis-server --test-memory. |
78 | * INCRBYFLOAT and HINCRBYFLOAT commands. |
79 | * New DUMP, RESTORE, MIGRATE commands (back ported from Redis Cluster to 2.6). |
80 | * CRC64 checksump in RDB files. |
81 | * Better MONITOR output and behavior (now commands are logged before execution). |
82 | * "Software Watchdog" feature to debug latency issues. |
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83 | * Significant parts of the core refactored or rewritten. New internal APIs |
84 | and core changes allowed to develop Redis Cluster on top of the new code, |
85 | however for 2.6 all the cluster code was removed, and will be released with |
86 | Redis 3.0 when it is more complete and stable. |
87 | * Redis ASCII art logo added at startup. |
88 | * Crash report on memory violation or failed asserts improved significantly |
89 | to make debugging of hard to catch bugs simpler. |
90 | * redis-benchmark improvements: ability to run selected tests, |
91 | CSV output, faster, better help. |
92 | * redis-cli improvements: --eval for comfortable development of Lua scripts. |
93 | * SHUTDOWN now supports two optional arguments: "SAVE" and "NOSAVE". |
94 | * INFO output split into sections, the command is now able to just show |
95 | pecific sections. |
96 | * New statistics about how many time a command was called, and how much |
97 | execution time it used (INFO commandstats). |
98 | * More predictable SORT behavior in edge cases. |
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99 | * Better support for big endian and *BSD systems. |
100 | * Build system improved. |
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101 | |
102 | -------------------------------------------------------------------------------- |
103 | |
104 | Credits: Where not specified the implementation and design are done by |
105 | Salvatore Sanfilippo and Pieter Noordhuis. Thanks to VMware for making all |
106 | this possible. Also many thanks to all the other contributors and the amazing |
107 | community we have. |
108 | |
109 | See commit messages for more credits. |
110 | |
111 | Cheers, |
112 | Salvatore |