Shulou(Shulou.com)06/01 Report--

Problems existing in stand-alone Redis

Unable to fail over, unable to avoid single point of failure

Disk space bottleneck

QPS bottleneck

The role of Redis master-slave replication

Provide a copy of the data

Extended read performance

Configuration method

By command

Through the configuration file

Demo

For demonstration purposes, set up a redis master and slave on a server (not in production), distinguished by port.

Main library 6379

From library 6380

Edit configuration file

Vi redis-6379.conf

# background process starts daemonize yes # port port 637 log file name logfile "6379.log" # Redis working directory dir / server/redis_data#RDB file name dbfilename dump-6379.rdb

Vi redis-6380.conf

Daemonize yesport 6380logfile "6380.log" dir / server/redis_data# master library ip and port slaveof 10.238.162.34 637slave read-only slave-read-only yes

Start the redis service

Redis-server / usr/local/redis/config/redis-6379.confredis-server / usr/local/redis/config/redis-6380.conf

View replication status

Main library [root@localhost config] # redis-cli-p 6379 info replication# Replicationrole:masterconnected_slaves:1slave0:ip=10.238.162.34,port=6380,state=online,offset=1525 Lag=0master_repl_offset:1525repl_backlog_active:1repl_backlog_size:1048576repl_backlog_first_byte_offset:2repl_backlog_histlen:1524 slave library [root@localhost config] # redis-cli-p 6380 info replication# Replicationrole:slavemaster_host:10.238.162.34master_port:6379master_link_status:upmaster_last_io_seconds_ago:4master_sync_in_progress:0slave_repl_offset:1595slave_priority:100slave_read_only:1connected_slaves:0master_repl_offset:0repl _ backlog_active:0repl_backlog_size:1048576repl_backlog_first_byte_offset:0repl_backlog_histlen:0

View the log to observe the replication process

Main library

Slave library

Summary

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