Redis 6.0 release notes
=======================

--------------------------------------------------------------------------------
Upgrade urgency levels:

LOW:      No need to upgrade unless there are new features you want to use.
MODERATE: Program an upgrade of the server, but it's not urgent.
HIGH:     There is a critical bug that may affect a subset of users. Upgrade!
CRITICAL: There is a critical bug affecting MOST USERS. Upgrade ASAP.
SECURITY: There are security fixes in the release.
--------------------------------------------------------------------------------

================================================================================
Redis 6.0 RC2     Released Thu Mar 05 15:40:53 CET 2020
================================================================================

Upgrade urgency MODERATE: Normal bugfixing release of a non-GA branch.

Hi Redis users, Redis 6 is approaching and will be released 30th of April.
New release candidates will be released at the end of March, then another
one mid April, to finally reach the GA at the end of April.

Redis 6 RC2 brings many fixes and new things, especially in the area of
client side caching. This is the list of big changes in this release. As
usually you can find the full list of commits at the end:

New features and improvements:

* ACL LOG: log denied commands, keys accesses and authentications.
* Client side caching redesigned. Now we use keys not caching slots.
* Client side caching: Broadcasting mode implemented.
* Client side caching: OPTIN/OUTPUT modes implemented.
* Remove RDB files used for replication in persistence-less instances (option).

Fixes (only selected ones, see commits for all the fixes):

* Different fixes to streams in edge cases.
* Fix duplicated CLIENT SETNAME reply because of RESP3 changes.
* Fix crash due to new active expire division by zero.
* Avoid sentinel changes promoted_slave to be its own replica.
* Fix bug on KEYS command where pattern starts with * followed by \x00.
* Threaded I/O: now the main thread is used as well to do I/O.
* Many fixes to modules APIs, and more to come in the next RCs.
* ld2string should fail if string contains \0 in the middle.
* Make the Redis test more reliable.
* Fix SPOP returning nil (see #4709). WARNING: API change.

qetu3790 in commit 4af0d7fd:
 Fix not used constant in lru_test_mode.
 1 file changed, 1 insertion(+), 1 deletion(-)

hwware in commit 6ef01878:
 add missing file marco
 1 file changed, 5 insertions(+)

ShooterIT in commit fe81d5c8:
 Avoid compiler warnings
 1 file changed, 1 insertion(+)

antirez in commit c2f01d7f:
 RDB deletion: document it in example redis.conf.
 1 file changed, 13 insertions(+)

antirez in commit 127e09bc:
 Make sync RDB deletion configurable. Default to no.
 3 files changed, 22 insertions(+), 4 deletions(-)

antirez in commit a20303c6:
 Check that the file exists in removeRDBUsedToSyncReplicas().
 1 file changed, 8 insertions(+), 4 deletions(-)

antirez in commit 7a23b945:
 Log RDB deletion in persistence-less instances.
 1 file changed, 15 insertions(+), 2 deletions(-)

antirez in commit baaf869f:
 Introduce bg_unlink().
 1 file changed, 31 insertions(+), 3 deletions(-)

antirez in commit be4bc1a5:
 Remove RDB files used for replication in persistence-less instances.
 3 files changed, 56 insertions(+), 1 deletion(-)

antirez in commit 07dc1b42:
 Use a smaller getkeys global buffer.
 1 file changed, 1 insertion(+), 1 deletion(-)

Oran Agra in commit 10e71b3d:
 Optimize temporary memory allocations for getKeysFromCommand mechanism
 1 file changed, 31 insertions(+), 10 deletions(-)

antirez in commit edc0ed14:
 Modules: reformat RM_Scan() top comment a bit.
 1 file changed, 21 insertions(+), 12 deletions(-)

antirez in commit c5319612:
 Modules: more details in RM_Scan API top comment.
 1 file changed, 22 insertions(+), 6 deletions(-)

Oran Agra in commit fff6b26a:
 RM_Scan disable dict rehashing
 2 files changed, 21 insertions(+), 6 deletions(-)

Guy Benoish in commit 65048460:
 Add RM_CreateStringFromDouble
 2 files changed, 14 insertions(+)

Oran Agra in commit 3144a278:
 add no_auth to COMMAND INFO
 1 file changed, 1 insertion(+)

Oran Agra in commit afe0b16c:
 module api docs for aux_save and aux_load
 2 files changed, 7 insertions(+), 1 deletion(-)

Guy Benoish in commit df152b0c:
 streamReplyWithRangeFromConsumerPEL: Redundant streamDecodeID
 1 file changed, 1 insertion(+), 3 deletions(-)

antirez in commit e3c1f439:
 Show Redis version when not understanding a config directive.
 1 file changed, 2 insertions(+), 1 deletion(-)

antirez in commit 141c0679:
 Changelog: explain Redis 6 SPOP change.
 1 file changed, 4 insertions(+), 1 deletion(-)

bodong.ybd in commit fe902461:
 Fix spop return nil #4709
 1 file changed, 1 insertion(+), 1 deletion(-)

antirez in commit 9d4219eb:
 Fix SDS misuse in enumConfigSet(). Related to #6778.
 1 file changed, 3 insertions(+), 3 deletions(-)

antirez in commit 84243064:
 Remove useless comment from enumConfigSet().
 1 file changed, 1 deletion(-)

Ponnuvel Palaniyappan in commit dafb94db:
 Fix a potential overflow with strncpy
 1 file changed, 5 insertions(+), 5 deletions(-)

antirez in commit ea697b63:
 Improve aeDeleteEventLoop() top comment grammar.
 1 file changed, 2 insertions(+), 1 deletion(-)

wangyuan21 in commit dd479880:
 free time event when delete eventloop
 1 file changed, 7 insertions(+)

srzhao in commit ecf3b2ef:
 fix impl of aof-child whitelist SIGUSR1 feature.
 1 file changed, 5 insertions(+), 4 deletions(-)

meir@redislabs.com in commit 2966132c:
 Changed log level for module fork api from 'notice' to 'verbos'.
 1 file changed, 2 insertions(+), 2 deletions(-)

hwware in commit 7277e5d8:
 format fix
 1 file changed, 1 insertion(+), 1 deletion(-)

hwware in commit 1bb5ee9c:
 fix potentical memory leaks
 1 file changed, 4 insertions(+), 1 deletion(-)

Hengjian Tang in commit 97329733:
 modify the read buf size according to the write buf size PROTO_IOBUF_LEN defined before
 1 file changed, 1 insertion(+), 1 deletion(-)

Ariel in commit 15ea1324:
 fix ThreadSafeContext lock/unlock function names
 1 file changed, 2 insertions(+), 2 deletions(-)

Guy Benoish in commit 4d12c37c:
 XREADGROUP should propagate XCALIM/SETID in MULTI/EXEC
 1 file changed, 2 insertions(+), 2 deletions(-)

Oran Agra in commit 12626ce9:
 fix race in module api test for fork
 2 files changed, 2 insertions(+), 3 deletions(-)

Guy Benoish in commit 2ecab0b6:
 Modules: Do not auto-unblock clients if not blocked on keys
 1 file changed, 22 insertions(+), 7 deletions(-)

Oran Agra in commit 635321d4:
 fix github actions failing latency test for active defrag - part 2
 2 files changed, 5 insertions(+), 4 deletions(-)

Oran Agra in commit 0b988fa9:
 fix github actions failing latency test for active defrag
 2 files changed, 14 insertions(+), 13 deletions(-)

Oran Agra in commit 60096bc1:
 Fix latency sensitivity of new defrag test
 1 file changed, 32 insertions(+), 8 deletions(-)

antirez in commit b4395426:
 Tracking: optin/out implemented.
 3 files changed, 82 insertions(+), 16 deletions(-)

antirez in commit ef3551d1:
 Test engine: experimental change to avoid busy port problems.
 1 file changed, 84 insertions(+), 49 deletions(-)

antirez in commit 72c05351:
 Test engine: detect timeout when checking for Redis startup.
 1 file changed, 11 insertions(+), 1 deletion(-)

antirez in commit 294c9af4:
 Test engine: better tracking of what workers are doing.
 2 files changed, 12 insertions(+), 4 deletions(-)

hwware in commit ba027079:
 add missing subcommand description for debug oom
 1 file changed, 1 insertion(+)

Guy Benoish in commit 5d0890c0:
 Fix memory leak in test_ld_conv
 1 file changed, 4 insertions(+)

Madelyn Olson in commit d1f22eac:
 Give an error message if you specify redirect twice
 1 file changed, 7 insertions(+)

Madelyn Olson in commit 762fbcb6:
 Minor CSC fixes and fixed documentation
 2 files changed, 16 insertions(+), 17 deletions(-)

Oran Agra in commit 349aa245:
 Defrag big lists in portions to avoid latency and freeze
 4 files changed, 350 insertions(+), 34 deletions(-)

Guy Benoish in commit b4ddc7b7:
 XGROUP DESTROY should unblock XREADGROUP with -NOGROUP
 2 files changed, 11 insertions(+)

hayashier in commit 73806f74:
 fix typo from fss to rss
 1 file changed, 2 insertions(+), 2 deletions(-)

antirez in commit b6129f86:
 Test is more complex now, increase default timeout.
 1 file changed, 1 insertion(+), 1 deletion(-)

antirez in commit f15fb727:
 Tracking: fix max-keys configuration directive.
 2 files changed, 2 insertions(+), 2 deletions(-)

Itamar Haber in commit e374573f:
 Fixes segfault on calling trackingGetTotalKeys
 1 file changed, 1 insertion(+)

antirez in commit 73d47d57:
 Signal key as modified when expired on-access.
 1 file changed, 4 insertions(+), 2 deletions(-)

antirez in commit b7cb28d5:
 Tracking: first set of tests for the feature.
 1 file changed, 66 insertions(+)

antirez in commit 1db72571:
 Tracking: fix operators precedence error in bcast check.
 1 file changed, 1 insertion(+), 1 deletion(-)

antirez in commit fe96e29d:
 Tracking: fix behavior when switchinig from normal to BCAST.
 1 file changed, 11 insertions(+), 1 deletion(-)

antirez in commit f21be1ec:
 Tracking: fix sending messages bug + tracking off bug.
 2 files changed, 28 insertions(+), 20 deletions(-)

antirez in commit 6fb1aa23:
 Tracking: BCAST: basic feature now works.
 3 files changed, 55 insertions(+), 40 deletions(-)

antirez in commit d4fe79a1:
 Tracking: BCAST: broadcasting of keys in prefixes implemented.
 2 files changed, 94 insertions(+), 9 deletions(-)

antirez in commit abb81c63:
 Tracking: BCAST: registration in the prefix table.
 3 files changed, 67 insertions(+), 20 deletions(-)

antirez in commit 77da9608:
 Tracking: BCAST: parsing of the options + skeleton.
 4 files changed, 73 insertions(+), 19 deletions(-)

antirez in commit 3e8c69a9:
 Tracking: always reply with an array of keys.
 2 files changed, 10 insertions(+), 3 deletions(-)

antirez in commit a788c373:
 Tracking: minor change of names and new INFO field.
 4 files changed, 11 insertions(+), 4 deletions(-)

antirez in commit df838927:
 Rax.c: populate data field after random walk.
 1 file changed, 1 insertion(+)

antirez in commit 0517da36:
 Tracking: rename INFO field with total items.
 1 file changed, 1 insertion(+), 1 deletion(-)

antirez in commit 3c16d6b3:
 Tracking: first conversion from hashing to key names.
 3 files changed, 84 insertions(+), 114 deletions(-)

Oran Agra in commit 3b4f1477:
 add no-slowlog option to RM_CreateCommand
 1 file changed, 3 insertions(+)

Khem Raj in commit 5e762d84:
 Mark extern definition of SDS_NOINIT in sds.h
 1 file changed, 1 insertion(+), 1 deletion(-)

lifubang in commit 54f5499a:
 correct help info for --user and --pass
 1 file changed, 2 insertions(+), 2 deletions(-)

Seunghoon Woo in commit 0c952b13:
 [FIX] revisit CVE-2015-8080 vulnerability
 1 file changed, 6 insertions(+), 4 deletions(-)

Guy Benoish in commit dd34f703:
 Diskless-load emptyDb-related fixes
 3 files changed, 44 insertions(+), 28 deletions(-)

lifubang in commit 5e042dbc:
 fix ssl flag check for redis-cli
 1 file changed, 10 insertions(+), 9 deletions(-)

Guy Benoish in commit dcbe8bfa:
 Exclude "keymiss" notification from NOTIFY_ALL
 5 files changed, 12 insertions(+), 7 deletions(-)

Oran Agra in commit 36caf2e4:
 update RM_SignalModifiedKey doc comment
 1 file changed, 2 insertions(+), 1 deletion(-)

Oran Agra in commit 3067352a:
 Add handling of short read of module id in rdb
 1 file changed, 4 insertions(+), 1 deletion(-)

Yossi Gottlieb in commit 9baaf858:
 TLS: Update documentation.
 2 files changed, 32 insertions(+), 31 deletions(-)

Oran Agra in commit 4440133e:
 A few non-data commands that should be allowed while loading or stale
 1 file changed, 8 insertions(+), 8 deletions(-)

Oran Agra in commit c9577941:
 Memory leak when bind config is provided twice
 1 file changed, 4 insertions(+)

Oran Agra in commit 1333a46b:
 fix maxmemory config warning
 1 file changed, 3 insertions(+), 2 deletions(-)

Oran Agra in commit 8e7282eb:
 Fix client flags to be int64 in module.c
 1 file changed, 3 insertions(+), 3 deletions(-)

Oran Agra in commit a678390e:
 moduleRDBLoadError, add key name, and use panic rather than exit
 1 file changed, 5 insertions(+), 4 deletions(-)

Oran Agra in commit 919fbf42:
 reduce repeated calls to use_diskless_load
 1 file changed, 3 insertions(+), 4 deletions(-)

Oran Agra in commit 22e45d46:
 freeClientAsync don't lock mutex if there's just one thread
 1 file changed, 6 insertions(+), 1 deletion(-)

Oran Agra in commit ba289244:
 move restartAOFAfterSYNC from replicaofCommand to replicationUnsetMaster
 1 file changed, 4 insertions(+), 3 deletions(-)

Oran Agra in commit f42ce57d:
 stopAppendOnly resets aof_rewrite_scheduled
 1 file changed, 1 insertion(+)

Oran Agra in commit df096bc9:
 add SAVE subcommand to ACL HELP and top comment
 1 file changed, 2 insertions(+)

Oran Agra in commit a55e5847:
 DEBUG HELP - add PROTOCOL
 1 file changed, 3 insertions(+), 2 deletions(-)

Guy Benoish in commit 5a6cfbf4:
 Some refactroing using getClientType instead of CLIENT_SLAVE
 2 files changed, 18 insertions(+), 26 deletions(-)

Guy Benoish in commit fae306b3:
 Fix small bugs related to replica and monitor ambiguity
 2 files changed, 8 insertions(+), 6 deletions(-)

Yossi Gottlieb in commit 73630966:
 TLS: Some redis.conf clarifications.
 1 file changed, 10 insertions(+), 11 deletions(-)

Oran Agra in commit 488e1947:
 config.c verbose error replies for CONFIG SET, like config file parsing
 1 file changed, 31 insertions(+), 97 deletions(-)

Oran Agra in commit c82ccf06:
 memoryGetKeys helper function so that ACL can limit access to keys for MEMORY command
 3 files changed, 18 insertions(+), 1 deletion(-)

antirez in commit 51c1a9f8:
 ACL LOG: make max log entries configurable.
 4 files changed, 19 insertions(+)

antirez in commit ea1e1b12:
 ACL LOG: test for AUTH reason.
 1 file changed, 9 insertions(+)

antirez in commit 7379c78a:
 ACL LOG: log failed auth attempts.
 5 files changed, 34 insertions(+), 12 deletions(-)

antirez in commit 9f6e84f6:
 ACL LOG: implement a few basic tests.
 1 file changed, 87 insertions(+)

antirez in commit 82790e51:
 ACL LOG: also log ACL errors in the scripting/MULTI ctx.
 2 files changed, 6 insertions(+), 2 deletions(-)

antirez in commit 943008eb:
 ACL LOG: implement LOG RESET.
 1 file changed, 6 insertions(+), 2 deletions(-)

antirez in commit e271a611:
 ACL LOG: group similar entries in a given time delta.
 1 file changed, 58 insertions(+), 3 deletions(-)

antirez in commit f1974d5d:
 ACL LOG: actually emit entries.
 3 files changed, 34 insertions(+), 5 deletions(-)

antirez in commit d9b153c9:
 ACL LOG: implement ACL LOG subcommadn skeleton.
 1 file changed, 37 insertions(+)

antirez in commit 577fc438:
 ACL LOG: data structures and initial functions.
 5 files changed, 54 insertions(+), 5 deletions(-)

Leo Murillo in commit f7a94526:
 Set ZSKIPLIST_MAXLEVEL to optimal value given 2^64 elements and p=0.25
 1 file changed, 1 insertion(+), 1 deletion(-)

WuYunlong in commit eecfa979:
 Fix lua related memory leak.
 1 file changed, 1 insertion(+)

WuYunlong in commit d2509811:
 Add tcl regression test in scripting.tcl to reproduce memory leak.
 1 file changed, 5 insertions(+)

Yossi Gottlieb in commit 29d4a150:
 TLS: Fix missing initialization in redis-cli.
 1 file changed, 9 insertions(+)

Oran Agra in commit ec0c61da:
 fix uninitialized info_cb var in module.c
 1 file changed, 1 insertion(+)

Guy Benoish in commit 6fe55c2f:
 ld2string should fail if string contains \0 in the middle
 5 files changed, 20 insertions(+), 11 deletions(-)

antirez in commit bbce3ba9:
 Add more info in the unblockClientFromModule() function.
 1 file changed, 7 insertions(+), 1 deletion(-)

Guy Benoish in commit 40295fb3:
 Modules: Fix blocked-client-related memory leak
 3 files changed, 51 insertions(+), 6 deletions(-)

antirez in commit 8e9d19bc:
 Change error message for #6775.
 1 file changed, 2 insertions(+), 2 deletions(-)

Vasyl Melnychuk in commit ba146d4c:
 Make error when submitting command in incorrect context more explicit
 1 file changed, 4 insertions(+), 1 deletion(-)

antirez in commit 721a39dd:
 Document I/O threads in redis.conf.
 1 file changed, 46 insertions(+)

antirez in commit 5be3a15a:
 Setting N I/O threads should mean N-1 additional + 1 main thread.
 1 file changed, 25 insertions(+), 22 deletions(-)

antirez in commit cbabf779:
 Simplify #6379 changes.
 2 files changed, 4 insertions(+), 9 deletions(-)

WuYunlong in commit 658749cc:
 Free allocated sds in pfdebugCommand() to avoid memory leak.
 1 file changed, 1 insertion(+)

WuYunlong in commit 47988c96:
 Fix potential memory leak of clusterLoadConfig().
 1 file changed, 20 insertions(+), 5 deletions(-)

WuYunlong in commit cc90f79b:
 Fix potential memory leak of rioWriteBulkStreamID().
 1 file changed, 4 insertions(+), 1 deletion(-)

antirez in commit ecd17e81:
 Jump to right label on AOF parsing error.
 1 file changed, 6 insertions(+), 4 deletions(-)

antirez in commit 1927932b:
 Port PR #6110 to new connection object code.
 1 file changed, 2 insertions(+), 2 deletions(-)

antirez in commit f2df5773:
 A few comments about main thread serving I/O as well.
 1 file changed, 7 insertions(+), 1 deletion(-)

zhaozhao.zz in commit b3ff8a4b:
 Threaded IO: use main thread to handle read work
 1 file changed, 8 insertions(+), 1 deletion(-)

zhaozhao.zz in commit b1f2c510:
 Threaded IO: use main thread to handle write work
 1 file changed, 10 insertions(+), 2 deletions(-)

ShooterIT in commit 7bbafc56:
 Rename rdb asynchronously
 1 file changed, 7 insertions(+)

Leo Murillo in commit c7f75266:
 Fix bug on KEYS command where pattern starts with * followed by \x00 (null char).
 1 file changed, 1 insertion(+), 1 deletion(-)

Jamie Scott in commit ed7ea13a:
 Update to directive in redis.conf (missing s)
 1 file changed, 1 insertion(+), 1 deletion(-)

antirez in commit 3be77623:
 Free fakeclient argv on AOF error.
 1 file changed, 11 insertions(+), 3 deletions(-)

antirez in commit 15f6b748:
 Git ignore: ignore more files.
 1 file changed, 2 insertions(+)

Guy Benoish in commit 1b5bf40c:
 Blocking XREAD[GROUP] should always reply with valid data (or timeout)
 3 files changed, 44 insertions(+), 10 deletions(-)

John Sully in commit 954c20ed:
 Add support for incremental build with header files
 2 files changed, 6 insertions(+), 1 deletion(-)

WuYunlong in commit 11c3afd7:
 Fix petential cluster link error.
 1 file changed, 4 insertions(+)

Yossi Gottlieb in commit b752e83d:
 Add REDISMODULE_CTX_FLAGS_MULTI_DIRTY.
 2 files changed, 8 insertions(+)

hwware in commit e16eb874:
 typo fix in acl.c
 1 file changed, 2 insertions(+), 2 deletions(-)

Itamar Haber in commit 35ea9d23:
 Adjusts 'io_threads_num' max to 128
 1 file changed, 1 insertion(+), 1 deletion(-)

antirez in commit 38729126:
 XCLAIM: Create the consumer only on successful claims.
 1 file changed, 4 insertions(+), 2 deletions(-)

yz1509 in commit b9a15303:
 avoid sentinel changes promoted_slave to be its own replica.
 1 file changed, 1 insertion(+), 1 deletion(-)

antirez in commit 5e7e5e6b:
 Fix active expire division by zero.
 1 file changed, 7 insertions(+), 4 deletions(-)

antirez in commit e61dde88:
 Fix duplicated CLIENT SETNAME reply.
 1 file changed, 1 deletion(-)

Guy Benoish in commit cddf1da2:
 Stream: Handle streamID-related edge cases
 4 files changed, 54 insertions(+), 4 deletions(-)

Oran Agra in commit 52ea44e5:
 config.c adjust config limits and mutable
 2 files changed, 7 insertions(+), 7 deletions(-)

antirez in commit 0f28ea16:
 Inline protocol: handle empty strings well.
 1 file changed, 2 insertions(+), 6 deletions(-)

antirez in commit 00e5fefe:
 Fix ip and missing mode in RM_GetClusterNodeInfo().
 1 file changed, 5 insertions(+), 2 deletions(-)

================================================================================
Redis 6.0 RC1   Released Thu Dec 19 09:58:24 CEST 2019
================================================================================

Upgrade urgency LOW: This is the first RC of Redis 6.

Introduction to the Redis 6 release
===================================

Redis 6 improves Redis in a number of key areas and is one of the largest
Redis releases in the history of the project, so here we'll list only
the biggest features in this release:

* The modules system now has a number of new APIs that allow module authors
  to make things otherwise not possible in the past. It is possible to
  store arbitrary module private data in RDB files, to hook on different
  server events, capture and rewrite commands executions, block clients on
  keys, and so forth. 
* The Redis active expire cycle was rewritten for much faster eviction of keys
  that are already expired. Now the effort is tunable.
* Redis now supports SSL on all channels.
* ACL support, you can define users that can run only certain commands and/or
  can only access only certain keys patterns.
* Redis now supports a new protocol called RESP3, which returns more
  semantical replies: new clients using this protocol can understand just
  from the reply what type to return to the calling program.
* There is server-side support for client-side caching of key values. This
  feature is still experimental and will get more changes during the next
  release candidates, but you can already test it and read about it here:
  https://redis.io/topics/client-side-caching
* Redis can now optionally use threads to handle I/O, allowing to serve
  2 times as much operations per second in a single instance when
  pipelining cannot be used.
* Diskless replication is now supported even on replicas: a replica is now
  able, under certain conditions the user can configure, to load the RDB
  in the first synchronization directly from the socket to the memory.
* Redis-benchmark now supports a Redis Cluster mode.
* SRANDMEMBER and similar commands have a better distribution.
* Redis-cli improvements.
* Systemd support rewritten.
* A Redis Cluster proxy was released here:
  https://github.com/artix75/redis-cluster-proxy
* A Disque module for Redis was released here:
  https://github.com/antirez/disque-module

Thanks to all the users and developers who made this release possible.
We'll follow up with more RC releases, until the code looks production ready
and we don't get reports of serious issues for a while.

A special thank you for the amount of work put into this release
(in decreasing number of commits, only listing contributors with more
than a single commit) by:

   685  antirez
    81  zhaozhao.zz
    76  Oran Agra
    51  artix
    28  Madelyn Olson
    27  Yossi Gottlieb
    15  David Carlier
    14  Guy Benoish
    14  Guy Korland
    13  Itamar Haber
     9  Angus Pearson
     8  WuYunlong
     8  yongman
     7  vattezhang
     7  Chris Lamb
     5  Dvir Volk
     5  meir@redislabs.com
     5  chendianqiang
     5  John Sully
     4  dejun.xdj
     4  Daniel Dai
     4  Johannes Truschnigg
     4  swilly22
     3  Bruce Merry
     3  filipecosta90
     3  youjiali1995
     2  James Rouzier
     2  Andrey Bugaevskiy
     2  Brad Solomon
     2  Hamid Alaei
     2  Michael Chaten
     2  Steve Webster
     2  Wander Hillen
     2  Weiliang Li
     2  Yuan Zhou
     2  charsyam
     2  hujie
     2  jem
     2  shenlongxing
     2  valentino
     2  zhudacai 00228490
     2  喜欢兰花山丘

Migrating from 5.0 to 6.0
=========================

Redis 6.0 is mostly a strict superset of 5.0, you should not have any problem
upgrading your application from 5.0 to 6.0. However this is a list of small
non-backward compatible changes introduced in the 6.0 release:

* The SPOP <count> command no longer returns null when the set key does not
  exist. Now it returns the empty set as it should and as happens when it is
  called with a 0 argument. This is technically a fix, however it changes the
  old behavior.

--------------------------------------------------------------------------------

Credits: For each release, a list of changes with the relative author is
provided. Where not specified the implementation and design is done by
Salvatore Sanfilippo. Thanks to Redis Labs for making all this possible.
Also many thanks to all the other contributors and the amazing community
we have.

Commit messages may contain additional credits.

Enjoy,
Salvatore
