Redis SET 命令不适用于默认数据库以外的任何数据库

Question

我遇到了一个问题，除了索引 0 处的默认数据库无法正常写入任何其他数据库。下面是使用 redis-cli 在默认数据库中创建 key 的快照，它是成功的。然后我切换到 DB 1 并运行相同的 SET 命令，但是当尝试获取它们的键时，它返回 (nil)，并且当使用 KEYS 命令列出键时，它返回(空列表或集合)。任何大于 0 的 DB 都会发生相同的行为。

这个问题最近才开始出现。我使用 DB 1 已经有一段时间了，没有任何问题。以下示例中的服务器是一组由 Sentinel 管理的三台服务器中的主服务器。

redisprod01:6379> set testkey "test"
OK
redisprod01:6379> get testkey
"test"
redisprod01:6379> keys testkey
1) "testkey"
redisprod01:6379> select 1
OK
redisprod01:6379[1]> set testkey "test"
OK
redisprod01:6379[1]> get testkey
(nil)
redisprod01:6379[1]> keys testkey
(empty list or set)

这是 INFO 命令的输出:

# Server
redis_version:2.8.4
redis_git_sha1:00000000
redis_git_dirty:0
redis_build_id:a44a05d76f06a5d9
redis_mode:standalone
os:Linux 3.16.0-30-generic x86_64
arch_bits:64
multiplexing_api:epoll
gcc_version:4.8.2
process_id:5172
run_id:c23834afdaf0e113f4cca368be9e88881fa82c91
tcp_port:6379
uptime_in_seconds:7762453
uptime_in_days:89
hz:10
lru_clock:567194
config_file:/etc/redis/redis.conf

# Clients
connected_clients:1176
client_longest_output_list:0
client_biggest_input_buf:0
blocked_clients:0

# Memory
used_memory:2000000696
used_memory_human:1.86G
used_memory_rss:2173636608
used_memory_peak:2003080696
used_memory_peak_human:1.87G
used_memory_lua:33792
mem_fragmentation_ratio:1.09
mem_allocator:jemalloc-3.4.1

# Persistence
loading:0
rdb_changes_since_last_save:17067
rdb_bgsave_in_progress:0
rdb_last_save_time:1536592844
rdb_last_bgsave_status:ok
rdb_last_bgsave_time_sec:5
rdb_current_bgsave_time_sec:-1
aof_enabled:0
aof_rewrite_in_progress:0
aof_rewrite_scheduled:0
aof_last_rewrite_time_sec:-1
aof_current_rewrite_time_sec:-1
aof_last_bgrewrite_status:ok

# Stats
total_connections_received:2617247
total_commands_processed:1810758972
instantaneous_ops_per_sec:1207
rejected_connections:0
sync_full:2
sync_partial_ok:0
sync_partial_err:2
expired_keys:2190259
evicted_keys:128303561
keyspace_hits:456747821
keyspace_misses:421644916
pubsub_channels:2
pubsub_patterns:0
latest_fork_usec:54236

# Replication
role:master
connected_slaves:2
slave0:ip=10.93.109.123,port=6379,state=online,offset=2166765462577,lag=0
slave1:ip=10.93.109.122,port=6379,state=online,offset=2166765336151,lag=0
master_repl_offset:2166765934628
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:2166764886053
repl_backlog_histlen:1048576

# CPU
used_cpu_sys:59513.46
used_cpu_user:50583.63
used_cpu_sys_children:25643.75
used_cpu_user_children:184819.30

# Keyspace
db0:keys=238726,expires=220772,avg_ttl=83043319

这是配置:

  1) "dbfilename"
  2) "dump.rdb"
  3) "requirepass"
  4) ""
  5) "masterauth"
  6) ""
  7) "unixsocket"
  8) ""
  9) "logfile"
 10) "/var/log/redis/redis.log"
 11) "pidfile"
 12) "/var/run/redis/redis-server.pid"
 13) "maxmemory"
 14) "2000000000"
 15) "maxmemory-samples"
 16) "3"
 17) "timeout"
 18) "0"
 19) "tcp-keepalive"
 20) "0"
 21) "auto-aof-rewrite-percentage"
 22) "100"
 23) "auto-aof-rewrite-min-size"
 24) "67108864"
 25) "hash-max-ziplist-entries"
 26) "512"
 27) "hash-max-ziplist-value"
 28) "64"
 29) "list-max-ziplist-entries"
 30) "512"
 31) "list-max-ziplist-value"
 32) "64"
 33) "set-max-intset-entries"
 34) "512"
 35) "zset-max-ziplist-entries"
 36) "128"
 37) "zset-max-ziplist-value"
 38) "64"
 39) "lua-time-limit"
 40) "5000"
 41) "slowlog-log-slower-than"
 42) "10000"
 43) "slowlog-max-len"
 44) "1024"
 45) "port"
 46) "6379"
 47) "databases"
 48) "16"
 49) "repl-ping-slave-period"
 50) "10"
 51) "repl-timeout"
 52) "60"
 53) "repl-backlog-size"
 54) "1048576"
 55) "repl-backlog-ttl"
 56) "3600"
 57) "maxclients"
 58) "10000"
 59) "watchdog-period"
 60) "0"
 61) "slave-priority"
 62) "100"
 63) "min-slaves-to-write"
 64) "0"
 65) "min-slaves-max-lag"
 66) "10"
 67) "hz"
 68) "10"
 69) "no-appendfsync-on-rewrite"
 70) "no"
 71) "slave-serve-stale-data"
 72) "yes"
 73) "slave-read-only"
 74) "yes"
 75) "stop-writes-on-bgsave-error"
 76) "yes"
 77) "daemonize"
 78) "yes"
 79) "rdbcompression"
 80) "yes"
 81) "rdbchecksum"
 82) "yes"
 83) "activerehashing"
 84) "yes"
 85) "repl-disable-tcp-nodelay"
 86) "no"
 87) "aof-rewrite-incremental-fsync"
 88) "yes"
 89) "appendonly"
 90) "no"
 91) "dir"
 92) "/var/lib/redis"
 93) "maxmemory-policy"
 94) "allkeys-lru"
 95) "appendfsync"
 96) "everysec"
 97) "save"
 98) "900 1 300 10 60 10000"
 99) "loglevel"
100) "notice"
101) "client-output-buffer-limit"
102) "normal 0 0 0 slave 268435456 67108864 60 pubsub 33554432 8388608 60"
103) "unixsocketperm"
104) "0"
105) "slaveof"
106) ""
107) "notify-keyspace-events"
108) ""
109) "bind"
110) "10.93.109.121"

Answer 1

Redis 集群不支持

select 命令。您最近是否从独立的 Redis 过渡到集群的 Redis？引用:https://redis.io/commands/select