127.0.0.1:6379> CLIENT LIST

id=3 addr=127.0.0.1:65265 fd=6 name= age=322 idle=0 flags=N db=0 sub=0 psub=0 multi=-1 qbuf=0 qbuf-free=32768 obl=0 oll=0 omem=0 events=r cmd=client

id=4 addr=127.0.0.1:65407 fd=7 name= age=2 idle=2 flags=N db=0 sub=0 psub=0 multi=-1 qbuf=0 qbuf-free=0 obl=0 oll=0 omem=0 events=r cmd=NULL

127.0.0.1:6379> CLIENT SETNAME LOVE-1

OK

127.0.0.1:6379> CLIENT SETNAME LOVE-1

OK

127.0.0.1:6379> CLIENT LIST

id=3 addr=127.0.0.1:65265 fd=6 name=LOVE-1 age=469 idle=0 flags=N db=0 sub=0 psub=0 multi=-1 qbuf=0 qbuf-free=32768 obl=0 oll=0 omem=0 events=r cmd=client

id=4 addr=127.0.0.1:65407 fd=7 name=LOVE-2 age=149 idle=2 flags=N db=0 sub=0 psub=0 multi=-1 qbuf=0 qbuf-free=0 obl=0 oll=0 omem=0 events=r cmd=client

127.0.0.1:6379> keys *

1) "myhash"

127.0.0.1:6379> DBSIZE

(integer) 1

127.0.0.1:6379> info

# Server

redis_version:3.0.2

redis_git_sha1:00000000

redis_git_dirty:0

redis_build_id:d8ace20bbd69868e

redis_mode:standalone

os:Darwin 15.0.0 x86_64

arch_bits:64

multiplexing_api:kqueue

gcc_version:4.2.1

process_id:16628

run_id:9c1a3e66ab22e039dc827b46f70936fb722c0452

tcp_port:6379

uptime_in_seconds:459

uptime_in_days:0

hz:10

lru_clock:9886885

config_file:

# Clients

connected_clients:1

client_longest_output_list:0

client_biggest_input_buf:0

blocked_clients:0

# Memory

used_memory:576832

used_memory_human:563.31K

used_memory_rss:1826816

used_memory_peak:576832

used_memory_peak_human:563.31K

used_memory_lua:36864

mem_fragmentation_ratio:3.17

mem_allocator:libc

# Persistence

loading:0

rdb_changes_since_last_save:1

rdb_bgsave_in_progress:0

rdb_last_save_time:1452727002

rdb_last_bgsave_status:ok

rdb_last_bgsave_time_sec:-1

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

aof_last_write_status:ok

# Stats

total_connections_received:2

total_commands_processed:14

instantaneous_ops_per_sec:0

total_net_input_bytes:490

total_net_output_bytes:4385

instantaneous_input_kbps:0.00

instantaneous_output_kbps:0.00

rejected_connections:0

sync_full:0

sync_partial_ok:0

sync_partial_err:0

expired_keys:0

evicted_keys:0

keyspace_hits:1

keyspace_misses:0

pubsub_channels:0

pubsub_patterns:0

latest_fork_usec:0

migrate_cached_sockets:0

# Replication

role:master

connected_slaves:0

master_repl_offset:0

repl_backlog_active:0

repl_backlog_size:1048576

repl_backlog_first_byte_offset:0

repl_backlog_histlen:0

# CPU

used_cpu_sys:0.33

used_cpu_user:0.15

used_cpu_sys_children:0.00

used_cpu_user_children:0.00

# Cluster

cluster_enabled:0

# Keyspace

db0:keys=1,expires=0,avg_ttl=0

127.0.0.1:6379> INFO cpu

# CPU

used_cpu_sys:0.40

used_cpu_user:0.18

used_cpu_sys_children:0.00

used_cpu_user_children:0.00

127.0.0.1:6379> INFO cluster

# Cluster

cluster_enabled:0

127.0.0.1:6379> INFO replication

# Replication

role:master

connected_slaves:0

master_repl_offset:0

repl_backlog_active:0

repl_backlog_size:1048576

repl_backlog_first_byte_offset:0

repl_backlog_histlen:0

eval 'while true do  end' 0

127.0.0.1:6379> info

BUSY Redis is busy running a script. You can only call SCRIPT KILL or SHUTDOWN NOSAVE.

127.0.0.1:6379> set a 1

(error) BUSY Redis is busy running a script. You can only call SCRIPT KILL or SHUTDOWN NOSAVE.

127.0.0.1:6379>

127.0.0.1:6379> SCRIPT KILL

OK

127.0.0.1:6379> info

# Server

redis_version:3.0.2

127.0.0.1:6379> eval 'while true do  end' 0

(error) ERR Error running script (call to f_227454c4c36ed5fb02fb2a11cab0da179d0dd7ab): @user_script:1: Script killed by user with SCRIPT KILL...

(261.97s)

127.0.0.1:6379> SHUTDOWN NOSAVE

not connected>

# 무한루프 세션

127.0.0.1:6379> eval 'while true do  end' 0

Could not connect to Redis at 127.0.0.1:6379: Connection refused

(15.70s)

# 서버 로그 

34701:M 11 Jan 01:50:22.344 # User requested shutdown...

34701:M 11 Jan 01:50:22.344 # Redis is now ready to exit, bye bye...

PFADD visits:2015-12-31 "x"

(error) WRONGTYPE Key is not a valid HyperLogLog string value.

/* Check if the object is a String with a valid HLL representation.

 * Return C_OK if this is true, otherwise reply to the client

 * with an error and return C_ERR. */

int isHLLObjectOrReply(client *c, robj *o) {

    struct hllhdr *hdr;

    /* Key exists, check type */

    if (checkType(c,o,OBJ_STRING))

        return C_ERR; /* Error already sent. */

    if (stringObjectLen(o) < sizeof(*hdr)) goto invalid;

    hdr = o->ptr;

    /* Magic should be "HYLL". */

    if (hdr->magic[0] != 'H' || hdr->magic[1] != 'Y' ||

        hdr->magic[2] != 'L' || hdr->magic[3] != 'L') goto invalid;

    if (hdr->encoding > HLL_MAX_ENCODING) goto invalid;

    /* Dense representation string length should match exactly. */

    if (hdr->encoding == HLL_DENSE &&

        stringObjectLen(o) != HLL_DENSE_SIZE) goto invalid;

    /* All tests passed. */

    return C_OK;

invalid:

    addReplySds(c,

        sdsnew("-WRONGTYPE Key is not a valid "

               "HyperLogLog string value.\r\n"));

    return C_ERR;

}