mac os x用macport安裝redis

1、Redis簡要介紹

Redis是一個開源的使用ANSI C語言編寫、支持網絡、可基於內存亦可持久化的日誌型、Key-Value數據庫,並提供多種語言的API。從2010年3月15日起,Redis的開發工做由VMware主持。redis

 

redis是一個key-value存儲系統。和Memcached相似,它支持存儲的value類型相對更多,包括string(字符串)、list(鏈表)、set(集合)、zset(sorted set --有序集合)和hash(哈希類型)。這些數據類型都支持push/pop、add/remove及取交集並集和差集及更豐富的操做,並且這些操做都是原子性的。在此基礎上,redis支持各類不一樣方式的排序。與memcached同樣,爲了保證效率,數據都是緩存在內存中。區別的是redis會週期性的把更新的數據寫入磁盤或者把修改操做寫入追加的記錄文件,而且在此基礎上實現了master-slave(主從)同步。
Redis 是一個高性能的key-value數據庫。 redis的出現,很大程度補償了memcached這類key/value存儲的不足,在部 分場合能夠對關係數據庫起到很好的補充做用。它提供了Python,Ruby,Erlang,PHP客戶端,使用很方便。 [1]

2性能

下面是官方的bench-mark數據:
測試完成了50個併發執行100000個請求。
設置和獲取的值是一個256字節字符串。
Linux box是運行Linux 2.6,這是X3320 Xeon 2.5 ghz。
文本執行使用loopback接口(127.0.0.1)。
結果:寫的速度是110000次/s,讀的速度是81000次/s


若是真要把Redis與Memcached進行對比,參考下圖:

使用Memcached,讓我感觸頗深的是Object Size的問題,因爲SQL未做優化直接映射對象,致使緩存對象大於1MB,Memcached就拋了異常。而Redis默認緩存對象512MB,最大支持1GB。至少在緩存對象時,能夠有更大的伸縮空間了! 此外,是數據類型。Memcached比較簡單,而Redis能夠支持更多複雜的數據類型,如HASH、SET、SortedSet等等。數據庫

2、安裝使用   緩存

  一、安裝操做命令  網絡

    port install redis併發

      二、運行redis命令app

         redis-server /opt/local/etc/redis.confmemcached

      三、查看是否按照成功、使用使用緩存操做。oop

       

Holele-Book-Pro:~ user$ redis-cli   
redis 127.0.0.1:6379> ping
PONG
redis 127.0.0.1:6379> set mykey somevalue
OK
redis 127.0.0.1:6379> get mykey
"somevalue"
redis 127.0.0.1:6379> del mykey
(integer) 1
redis 127.0.0.1:6379> get mykey
(nil)
redis 127.0.0.1:6379> 

  

3、Redis經常使用操做使用命令。       性能

  一、append key value    測試

redis 127.0.0.1:6379> EXISTS mykey
(integer) 0
redis 127.0.0.1:6379> append mykey "www.sdgou.com"
(integer) 13
redis 127.0.0.1:6379> append mykey " welcome"
(integer) 21
redis 127.0.0.1:6379> get mykey
"www.sdgou.com welcome"
redis 127.0.0.1:6379> 

  二、bitcount key [start] [end]

redis 127.0.0.1:6379> del mykey
(integer) 1
redis 127.0.0.1:6379> get mykey
(nil)
redis 127.0.0.1:6379> set mykey "http://www.sdgou.com"
OK
redis 127.0.0.1:6379> bitcount mykey
(integer) 93
redis 127.0.0.1:6379> bitcount mykey 0 0
(integer) 3
redis 127.0.0.1:6379> bitcount mykey 1 1
(integer) 4
redis 127.0.0.1:6379> 

    三、bitop operation destkey key [key...]  

  • bitop and destkey srckey1 srckey2 srckey3 ... srckeyN
  • bitop or destkey srckey1 srckey2 srckey3 ... srckeyN
  • bitop xor destkey srckey1 srckey2 srckey3 ... srckeyN
  • bitop not destkey srckey

      位運算,按位與、按位或、按位異或、按位非

   

redis 127.0.0.1:6379> set mykey1 1
OK
redis 127.0.0.1:6379> set mykey2 1
OK
redis 127.0.0.1:6379> bitop and myresult mykey1 mykey2
(integer) 1
redis 127.0.0.1:6379> get myresult
"1"
redis 127.0.0.1:6379> set mykey2 0
OK
redis 127.0.0.1:6379> bitop and myresult mykey1 mykey2
(integer) 1
redis 127.0.0.1:6379> get myresult
"0"
redis 127.0.0.1:6379> bitop or myresult mykey1 mykey2
(integer) 1
redis 127.0.0.1:6379> get myresult
"1"
redis 127.0.0.1:6379> set mykey1 0
OK
redis 127.0.0.1:6379> bitop or myresult mykey1 mykey2
(integer) 1
redis 127.0.0.1:6379> get myresult
"0"

  四、decr  key  value

redis 127.0.0.1:6379> set key1 "10"
OK
redis 127.0.0.1:6379> 
redis 127.0.0.1:6379> decr key1
(integer) 9
redis 127.0.0.1:6379> get key1
"9"
redis 127.0.0.1:6379> set key1 "12312434325325254364654745"
OK
redis 127.0.0.1:6379> decr key1
(error) ERR value is not an integer or out of range
redis 127.0.0.1:6379> 
redis 127.0.0.1:6379> get key1
"12312434325325254364654745"
redis 127.0.0.1:6379> 


redis 127.0.0.1:6379> del key1
(integer) 1 
redis 127.0.0.1:6379> set key1 "10"
OK
redis 127.0.0.1:6379> get key1
"10"
redis 127.0.0.1:6379> decr key1
(integer) 9
redis 127.0.0.1:6379> get key1
"9"
redis 127.0.0.1:6379> decr key1
(integer) 8
redis 127.0.0.1:6379> get key1
"8"
redis 127.0.0.1:6379> 

  五、decrby key value

redis 127.0.0.1:6379> del key1
(integer) 1
redis 127.0.0.1:6379> get key1
(nil)
redis 127.0.0.1:6379> set key1 "20"
OK
redis 127.0.0.1:6379> decrby key1
(error) ERR wrong number of arguments for 'decrby' command
redis 127.0.0.1:6379> get key1
"20"
redis 127.0.0.1:6379> decrby key1 5
(integer) 15
redis 127.0.0.1:6379> decrby key1 4
(integer) 11
redis 127.0.0.1:6379> get key1
"11"
redis 127.0.0.1:6379> 

  六、get key

  

redis> GET nonexisting
(nil)
redis> SET mykey "Hello"
OK
redis> GET mykey
"Hello"
redis> 

  七、getbit key offset 

redis> SETBIT mykey 7 1
(integer) 0
redis> GETBIT mykey 0
(integer) 0
redis> GETBIT mykey 7
(integer) 1
redis> GETBIT mykey 100
(integer) 0
redis> 

  八、getrange key start and

redis> SET mykey "This is a string"
OK
redis> GETRANGE mykey 0 3
"This"
redis> GETRANGE mykey -3 -1
"ing"
redis> GETRANGE mykey 0 -1
"This is a string"
redis> GETRANGE mykey 10 100
"string"
redis> 

  九、getset key value

(integer) 0
redis 127.0.0.1:6379> del key1
(integer) 1
redis 127.0.0.1:6379> incr key1
(integer) 1
redis 127.0.0.1:6379> get key1
"1"
redis 127.0.0.1:6379> getset key1 "0"
"1"
redis 127.0.0.1:6379> get key1
"0"
redis 127.0.0.1:6379> set key2 "hello"
OK
redis 127.0.0.1:6379> getset key2 "sdgou.com"
"hello"
redis 127.0.0.1:6379> get key2
"sdgou.com"
redis 127.0.0.1:6379> 

  十、incr key

redis 127.0.0.1:6379> set mykey "10"
OK
redis 127.0.0.1:6379> get mykey
"10"
redis 127.0.0.1:6379> incr mykey
(integer) 11
redis 127.0.0.1:6379> get mykey
"11"
redis 127.0.0.1:6379> 

   十一、incrby key increment

edis> SET mykey "10"
OK
redis> INCRBY mykey 5
(integer) 15
redis> 

  十二、incrbyfloat key increment

redis> SET mykey 10.50
OK
redis> INCRBYFLOAT mykey 0.1
"10.6"
redis> SET mykey 5.0e3
OK
redis> INCRBYFLOAT mykey 2.0e2
"5200"
redis> 

  1三、mget key [key...]

redis> SET key1 "Hello"
OK
redis> SET key2 "World"
OK
redis> MGET key1 key2 nonexisting
1) "Hello"
2) "World"
3) (nil)
redis> 

  1四、mset key value [key value ...]

edis> MSET key1 "Hello" key2 "World"
OK
redis> GET key1
"Hello"
redis> GET key2
"World"
redis> 

  1五、msetnx key value [key value ...]

redis> MSETNX key1 "Hello" key2 "there"
(integer) 1
redis> MSETNX key2 "there" key3 "world"
(integer) 0
redis> MGET key1 key2 key3
1) "Hello"
2) "there"
3) (nil)
redis> 

  1六、psetex key milliseconds value

 

redis> PSETEX mykey 1000 "Hello"
OK
redis> PTTL mykey
(integer) 998
redis> GET mykey
"Hello"
redis> 

  1七、set key value [EX seconds] [PX milliseconds] [NX|XX]

edis> SET mykey "Hello"
OK
redis> GET mykey
"Hello"
redis> 

  18 、setbit  key offset value

redis> SETBIT mykey 7 1
(integer) 0
redis> SETBIT mykey 7 0
(integer) 1
redis> GET mykey
"\u0000"
redis> 

 1九、setex   key seconds value

redis> SETEX mykey 10 "Hello"
OK
redis> TTL mykey
(integer) 10
redis> GET mykey
"Hello"
redis> 

  20 、setnx   key value

edis> SETNX mykey "Hello"
(integer) 1
redis> SETNX mykey "World"
(integer) 0
redis> GET mykey
"Hello"
redis> 

 21 setrange key offset value

redis> SET key1 "Hello World"
OK
redis> SETRANGE key1 6 "Redis"
(integer) 11
redis> GET key1
"Hello Redis"
redis> 

  2二、strlen  key

redis> SET mykey "Hello world"
OK
redis> STRLEN mykey
(integer) 11
redis> STRLEN nonexisting
(integer) 0
redis> 
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