• 编译步骤
• 配置文件
• Key 类型
• 编译失败排错
  • 1. make test 失败 -- 缺少 tcl
  • 2. make test 失败 -- 内存少bug

Redis 单线程架构 + I/O 多路复用来实现高性能内存数据库服务

本次编译环境 CentOS 6.5

依赖 gcc、tcl

编译步骤

yum install tcl
tar xf redis-3.2.9.tar
cd redis-2.2.9
make
make test
cd src
make test
make install

配置文件

默认配置

bind 127.0.0.1
protected-mode yes
port 6379
tcp-backlog 511
timeout 0
tcp-keepalive 300
daemonize no
supervised no
pidfile /var/run/redis_6379.pid
loglevel notice
logfile ""
databases 16
save 900 1
save 300 10
save 60 10000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dbfilename dump.rdb
dir ./
slave-serve-stale-data yes
slave-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
repl-disable-tcp-nodelay no
slave-priority 100
appendonly no
appendfilename "appendonly.aof"
appendfsync everysec
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb
aof-load-truncated yes
lua-time-limit 5000
slowlog-log-slower-than 10000
slowlog-max-len 128
latency-monitor-threshold 0
notify-keyspace-events ""
hash-max-ziplist-entries 512
hash-max-ziplist-value 64
list-max-ziplist-size -2
list-compress-depth 0
set-max-intset-entries 512
zset-max-ziplist-entries 128
zset-max-ziplist-value 64
hll-sparse-max-bytes 3000
activerehashing yes
client-output-buffer-limit normal 0 0 0
client-output-buffer-limit slave 256mb 64mb 60
client-output-buffer-limit pubsub 32mb 8mb 60
hz 10
aof-rewrite-incremental-fsync yes

port
logfile
dir
daemonize

Key 类型

五种数据结构

• string 字符串 (Bitmaps 位图、HyperLogLog)
• hash 哈希
• list 列表
• set 集合
• zset 有序合集
• GEO 地理信息定位 Redis 3.2

sting 最大值不能超过 512M

Redis 数据结构和内部编码

一种数据结构对应多个内部编码优点

• 当有更优秀内部编码可替换，对外结构和命令没有影响
  exp: list 提供 quicklist，结合 ziplist、linkedlist两者优势

• 多种内部编码实现不同场景下发挥各自的优势
  exp: ziplist 比较省内存,但列表元素多时性能下降,会根据配置将 list 内部实现转换为 linkedlist

编译失败排错

1. make test 失败 -- 缺少 tcl

[root@dbaone redis-3.2.9]# make install
cd src && make install
make[1]: Entering directory `/data/redis-3.2.9/src'

Hint: It's a good idea to run 'make test' ;)

    INSTALL install
    INSTALL install
    INSTALL install
    INSTALL install
    INSTALL install
make[1]: Leaving directory `/data/redis-3.2.9/src'
[root@dbaone redis-3.2.9]#
[root@dbaone redis-3.2.9]# make test
cd src && make test
make[1]: Entering directory `/data/redis-3.2.9/src'
You need tcl 8.5 or newer in order to run the Redis test
make[1]: *** [test] Error 1
make[1]: Leaving directory `/data/redis-3.2.9/src'
make: *** [test] Error 2

解决：tcl 8.5 以上版本

yum install tcl -y

2. make test 失败 -- 内存少bug

!!! WARNING The following tests failed:

*** [err]: Slave should be able to synchronize with the master in tests/integration/replication-psync.tcl
Replication not started.
*** [err]: Test replication partial resync: ok after delay (diskless: yes, reconnect: 1) in tests/integration/replication-psync.tcl
Expected '623331211feaf78c74df41dc934bfc8af5a89a69' to be equal to '0000000000000000000000000000000000000000'
Cleanup: may take some time... OK
make[1]: *** [test] Error 1
make[1]: Leaving directory `/data/redis-3.2.9/src'
make: *** [test] Error 2

解决：#2715 -- fixbug 2715 -- blog 参考

vim tests/integration/replication-psync.tcl
113     #test_psync {ok psync} 6 100000000 3600 0 {
114     test_psync {ok psync} 6 10000000000 3600 0 {

make test

或

# 增加编译机器内存 1G -> 2G