Redis learning journey --redis Conf details

• Company unit
  The configuration file unit Company Case insensitive ！
  
• include contain

It's like we learn Spring、Improt, include

• The Internet network

bind 127.0.0.1 #  The binding of ip 
protected-mode yes #  Protected mode  
port 6379 #  Port settings 

• Universal GENERAL

daemonize yes #  Run as a daemon , The default is  no, We need to turn it on ourselves yes！ 
pidfile /var/run/redis_6379.pid #  If it runs in the background mode , We need to specify one  pid  file ！
 #  journal 
 # Specify the server verbosity level. 
 # This can be one of:
 # debug (a lot of information, useful for development/testing)
 # verbose (many rarely useful info, but not a mess like the debug level) 
 # notice (moderately verbose, what you want in production probably)  Production environment  
 # warning (only very important / critical messages are logged) 
   loglevel notice 
   logfile "" #  The file location name of the log  
   databases 16  #  Number of databases , The default is  16  A database  
   always-show-logo yes #  Always show LOGO

• snapshot SNAPSHOTTING

Persistence , Within the specified time , How many operations have been performed , Will be persisted to the file .rdb. aof
redis Is a memory database , If there is no persistence , So the data power failure and loss ！

#  If 900s Inside , If there is at least one 1 key It's been modified , We do persistence operations  
save 900 1 
#  If 300s Inside , If at least 10 key It's been modified , We do persistence operations  
save 300 10 
#  If 60s Inside , If at least 10000 key It's been modified , We do persistence operations  
save 60 10000 
#  We'll learn about persistence later , Will define the test itself ！ 
stop-writes-on-bgsave-error yes #  Persistence if something goes wrong , Whether you need to continue working ！ 
rdbcompression yes #  Is it compressed?  rdb  file , It needs to be consumed cpu resources ！ rdbchecksum yes #  preservation rdb When you file , Check for errors ！ 
dir ./ # rdb  The directory where the files are saved ！

• SECURITY Security

You can set it up here redis Password , The default is no password ！

127.0.0.1:6379> ping
PONG
127.0.0.1:6379> config get requirepass	# obtain Redis Password 
1) "requirepass"
2) ""
127.0.0.1:6379> config set requirepass "12345678"	# Set up Redis Password 
OK
127.0.0.1:6379> config get requirepass	# Found all commands without permission 
(error) NOAUTH Authentication required.
127.0.0.1:6379> ping
(error) NOAUTH Authentication required.
127.0.0.1:6379> auth 12345678	# Log in with a password ！
OK
127.0.0.1:6379> config get requirepass
1) "requirepass"
2) "12345678"

• Master slave copy replication

• Limit CLIENTS

maxclients 10000 #  Settings can be connected to redis The maximum number of clients  
maxmemory <bytes> # redis  Configure maximum memory capacity  
maxmemory-policy noeviction #  The processing strategy after the memory reaches the upper limit  
1、volatile-lru： Only for key Conduct LRU（ The default value is ） 
2、allkeys-lru ：  Delete lru Algorithm key 
3、volatile-random： Random delete is about to expire key 
4、allkeys-random： Random delete  
5、volatile-ttl ：  Delete expiring  
6、noeviction ：  Never expire , Returns an error 

• APPEND ONLY Pattern aof To configure

appendonly no #  The default is not on aof Mode , The default is to use rdb Way persistent , In most cases , rdb Quite enough ！ 
appendfilename "appendonly.aof" #  The name of the persistent file  
# appendfsync always #  Every time you make a change, it will  sync. Consumption performance  
appendfsync everysec #  Once a second  sync, You may lose this 1s The data of ！ 
# appendfsync no #  Don't execute  sync, At this time, the operating system synchronizes its own data , The fastest ！