长安网站建设工作总结,网站风格分类,网站建设常用的方法,seo1新地址在哪里目录
一、概述
1、Redis 2、Redis的安装
Redis Windows环境设置
3、String: 字符串
3.1、字符串
3.2、数值
3.3、bitmap
4、Hash: 散列
5、List: 列表
6、Set: 集合
7、Sorted Set: 有序集合 一、概述
常识#xff1a;
磁盘#xff1a;1.寻址#xff1a;ms
磁盘1.寻址ms毫秒2.带宽MB/s 内存1.寻址ns (纳秒) 2.带宽GB/s 秒--毫秒--微妙--纳秒 磁盘比内存在寻址上慢了10W倍
内存带宽
前端总线频率/工作频率最高带宽 Pentium4 400MHz 3.2GB/s Pentium4 533MHz 4.2GB/s Pentium4 800MHz 6.4GB/s DDR266 266MHz 2.1GB/s 双通道DDR266 266MHz 4.2GB/s DDR333 333MHz 2.7GB/s 双通道DDR333 333MHz 5.4GB/s DDR400 400MHz 3.2GB/s 双通道DDR400 400MHz 6.4GB/s
磁盘 内存 常识
基础知识 关系型数据库建表必须给出schema,类型字节宽度存储倾向于行级存储面试题数据库表很大性能下降 1、增删改变慢 2、查询速度呢 1个或少量查询依然很快 2.并发大的时候会受硬盘带宽影响速度
SAP HANA:内存级别的关系型数据库 2T容量 贵定制服务机器
数据在磁盘和内存体积不一样的
折中方案 memcached redis ... 2个基础设施 1.冯诺依曼体系的硬件 2.以太网tcp/ip的网络
DB-Engines 数据库引擎
1、Redis
NoSQL(NoSQL Not Only SQL)意即不仅仅是SQL泛指非关系型的数据库。随着互联网web2.0网站的兴起传统的关系数据库在应付web2.0网站特别是超大规模和高并发的SNS类型的web2.0纯动态网站已经显得力不从心暴漏了很多难以克服的问题而非关系型的数据库则由于其本身的特点得到了非常迅速的发展。NoSQL数据库的产生就是为了解决大规模数据集合多重数据种类带来的挑战尤其是大数据应用难题包括超大规模数据的存储。例如谷歌每天为它们的用户收集万亿比特的数据。这些类型的数据存储不需要固定的模式无需多余操作就可以横向扩展。
Redis官网
Redis中文网站
Redis ( Remote DIctionary Server ) 通常被称为数据结构服务器因为值 ( value ) 可以是字符串 ( String ) , 哈希 ( Map ) , 列表 ( list ) , 集合 ( Sets ) 或有序集合 ( Sorted Sets ) 等类型。
redis 是二进制安全的 2、Redis的安装
Docker中安装redis Spring Boot入门深入(六)-Docker
Redis默认有16个库库的进入
127.0.0.1:6379 set k1 hello
OK
127.0.0.1:6379 get k1
hello
127.0.0.1:6379 select 8
OK
127.0.0.1:6379[8] get k1
(nil)
127.0.0.1:6379[8]直接redis-cli -n 8进入指定8库
#因为我环境在docker中前面添加了docker exec -it 16d9d3a548a1:其他环境不用添加
[rootlocalhost ~]# docker exec -it 16d9d3a548a1 redis-cli -n 8
SELECT 8 failed: NOAUTH Authentication required.
127.0.0.1:6379 auth 123456
OK
127.0.0.1:6379[8]
帮助的使用
127.0.0.1:6379 help
redis-cli 7.0.11
To get help about Redis commands type:help group to get a list of commands in grouphelp command for help on commandhelp tab to get a list of possible help topicsquit to exitTo set redis-cli preferences::set hints enable online hints:set nohints disable online hints
Set your preferences in ~/.redisclirc
127.0.0.1:6379 help setSADD key member [member ...]summary: Add one or more members to a setsince: 1.0.0SCARD keysummary: Get the number of members in a setsince: 1.0.0SDIFF key [key ...]summary: Subtract multiple setssince: 1.0.0SDIFFSTORE destination key [key ...]summary: Subtract multiple sets and store the resulting set in a keysince: 1.0.0SINTER key [key ...]summary: Intersect multiple setssince: 1.0.0SINTERCARD numkeys key [key ...] [LIMIT limit]summary: Intersect multiple sets and return the cardinality of the resultsince: 7.0.0SINTERSTORE destination key [key ...]summary: Intersect multiple sets and store the resulting set in a keysince: 1.0.0SISMEMBER key membersummary: Determine if a given value is a member of a setsince: 1.0.0SMEMBERS keysummary: Get all the members in a setsince: 1.0.0SMISMEMBER key member [member ...]summary: Returns the membership associated with the given elements for a setsince: 6.2.0SMOVE source destination membersummary: Move a member from one set to anothersince: 1.0.0SPOP key [count]summary: Remove and return one or multiple random members from a setsince: 1.0.0SRANDMEMBER key [count]summary: Get one or multiple random members from a setsince: 1.0.0SREM key member [member ...]summary: Remove one or more members from a setsince: 1.0.0SSCAN key cursor [MATCH pattern] [COUNT count]summary: Incrementally iterate Set elementssince: 2.8.0SUNION key [key ...]summary: Add multiple setssince: 1.0.0SUNIONSTORE destination key [key ...]summary: Add multiple sets and store the resulting set in a keysince: 1.0.0127.0.0.1:6379
清空缓存
127.0.0.1:6379 keys *
1) k1
127.0.0.1:6379 FLUSHDB
OK
127.0.0.1:6379 keys *
(empty array)
127.0.0.1:6379
Redis Windows环境设置
1、redis 注册为服务
redis-server.exe --service-install redis.windows.conf --service-name redis --port 63792、redis 服务卸载
redis-server.exe --service-uninstall --service-name redis3、redis 设置密码
redis.windows.conf 文件中的requirepass password
requirepass后为密码设置3、String: 字符串
3.1、字符串
正反向索引正向从0开始依次递增。反向:最后一位为-1,前一位为-2一直到最前方。
127.0.0.1:6379 help setSET key value [NX|XX] [GET] [EX seconds|PX milliseconds|EXAT unix-time-seconds|PXAT unix-time-milliseconds|KEEPTTL]summary: Set the string value of a keysince: 1.0.0group: string127.0.0.1:6379 set k1 hello
OK
127.0.0.1:6379 get k1
hello
127.0.0.1:6379 set k1 world nx #nx:不存在key才能设置成功 使用场景1.分布式锁2.只能新建
(nil)
127.0.0.1:6379 get k1
hello
127.0.0.1:6379 set k2 hello xx #xx:存在key才能设置成功只能更新
(nil)
127.0.0.1:6379 get k2
(nil)
127.0.0.1:6379 mset k3 a k4 b
OK
127.0.0.1:6379 mget k3 k4
1) a
2) b
127.0.0.1:6379 APPEND k1 world
(integer) 10
127.0.0.1:6379 get k1
helloworld
#正反向索引
127.0.0.1:6379 GETRANGE k1 5 9
world
127.0.0.1:6379 GETRANGE k1 5 -1
world
127.0.0.1:6379 GETRANGE k1 0 -1
helloworld
127.0.0.1:6379 SETRANGE k1 5 man
(integer) 10
127.0.0.1:6379 GETRANGE k1 0 -1
hello mand
127.0.0.1:6379 STRLEN k1
(integer) 10
127.0.0.1:6379 get k1
hello mand
127.0.0.1:6379 type k1
string
127.0.0.1:6379 FLUSHDB
OK
127.0.0.1:6379 help setSET key value [NX|XX] [GET] [EX seconds|PX milliseconds|EXAT unix-time-seconds|PXAT unix-time-milliseconds|KEEPTTL]summary: Set the string value of a keysince: 1.0.0group: string127.0.0.1:6379 set k1 99
OK
127.0.0.1:6379 type k1
string
127.0.0.1:6379 set k2 hello
OK
127.0.0.1:6379 type k2
string
127.0.0.1:6379 help OBJECTOBJECTsummary: A container for object introspection commandssince: 2.2.3group: genericOBJECT ENCODING keysummary: Inspect the internal encoding of a Redis objectsince: 2.2.3group: genericOBJECT FREQ keysummary: Get the logarithmic access frequency counter of a Redis objectsince: 4.0.0group: genericOBJECT HELPsummary: Show helpful text about the different subcommandssince: 6.2.0group: genericOBJECT IDLETIME keysummary: Get the time since a Redis object was last accessedsince: 2.2.3group: genericOBJECT REFCOUNT keysummary: Get the number of references to the value of the keysince: 2.2.3group: generic127.0.0.1:6379 OBJECT help1) OBJECT subcommand [arg [value] [opt] ...]. Subcommands are:2) ENCODING key3) Return the kind of internal representation used in order to store the value4) associated with a key.5) FREQ key6) Return the access frequency index of the key. The returned integer is7) proportional to the logarithm of the recent access frequency of the key.8) IDLETIME key9) Return the idle time of the key, that is the approximated number of
10) seconds elapsed since the last access to the key.
11) REFCOUNT key
12) Return the number of references of the value associated with the specified
13) key.
14) HELP
15) Prints this help.
127.0.0.1:6379 OBJECT ENCODING k2
embstr
127.0.0.1:6379 OBJECT ENCODING k1
int
127.0.0.1:6379 get k1
99
127.0.0.1:6379 set k3 aa
OK
127.0.0.1:6379 OBJECT ENCODING k3
embstr
127.0.0.1:6379 APPEND k3 bb
(integer) 4
127.0.0.1:6379 OBJECT ENCODING k3
raw
127.0.0.1:6379 set k10 中
OK
127.0.0.1:6379 get k10 #redis 是二进制安全的
\xe4\xb8\xad
127.0.0.1:6379 exit
[rootlocalhost ~]# docker exec -it 16d9d3a548a1 redis-cli --raw
127.0.0.1:6379 auth 123456
OK
127.0.0.1:6379 get k10
中
127.0.0.1:6379 flushdb
OK
127.0.0.1:6379 keys *127.0.0.1:6379 MSETNX k1 a k2 b
1
127.0.0.1:6379 mget k1 k2
a
b
127.0.0.1:6379 MSETNX k2 c k3 d
0
127.0.0.1:6379 mget k1 k2 k3
a
b127.0.0.1:6379
3.2、数值
字符串中有数值
127.0.0.1:6379 get k1
99
127.0.0.1:6379 INCR k1
(integer) 100
127.0.0.1:6379 get k1
100
127.0.0.1:6379 help incrINCR keysummary: Increment the integer value of a key by onesince: 1.0.0group: string127.0.0.1:6379 incrby k1 2
(integer) 102
127.0.0.1:6379 get k1
102
127.0.0.1:6379 DECR k1
(integer) 101
127.0.0.1:6379 DECR k1 2
(error) ERR wrong number of arguments for decr command
127.0.0.1:6379 DECRBY k1 2
(integer) 99
127.0.0.1:6379 INCRBYFLOAT k1 0.5
99.5
127.0.0.1:6379 get k1
99.5
127.0.0.1:6379
使用场景抢购秒杀详情页点赞评论规避并发下对数据库的事物操作完全由redis内存操作代替。
3.3、bitmap
127.0.0.1:6379 help setbitSETBIT key offset value #offset:二进制位的偏移量二进制位也是有索引的从0开始依次递增summary: Sets or clears the bit at offset in the string value stored at keysince: 2.2.0group: bitmap127.0.0.1:6379 setbit k1 1 1 #把二进位索引为1的位置的值设置为1只能设置为1或0
0
127.0.0.1:6379 STRLEN k1
1
127.0.0.1:6379 get k1 #ascii码0100 0000代表127.0.0.1:6379 setbit k1 7 1
0
127.0.0.1:6379 STRLEN k1
1
127.0.0.1:6379 get k1 #ascii码0100 0001代表A
A
127.0.0.1:6379 setbit k1 9 1 #长度增1超过8位
0
127.0.0.1:6379 STRLEN k1
2
127.0.0.1:6379 get k1
A
127.0.0.1:6379 help bitposBITPOS key bit [start [end [BYTE|BIT]]] #start,end 二进制 字节索引summary: Find first bit set or clear in a stringsince: 2.8.7group: bitmap127.0.0.1:6379 bitpos k1 1 0 0 #二进制位1第一次出现的位置在0-0字节索引中
1
127.0.0.1:6379 bitpos k1 1 1 1 #二进制位1第一次出现的位置在1-1字节索引中
9
127.0.0.1:6379 bitpos k1 1 0 1 #二进制位1第一次出现的位置在0-1字节索引中
1
127.0.0.1:6379 help bitcountBITCOUNT key [start end [BYTE|BIT]] #start,end 二进制 字节索引summary: Count set bits in a stringsince: 2.6.0group: bitmap127.0.0.1:6379 bitcount k1 0 1 #k1的ascii码0100 0001 0100 0000 索引0-1字节有3个1
3
127.0.0.1:6379 bitcount k1 0 0
2
127.0.0.1:6379 bitcount k1 1 1
1
127.0.0.1:6379 help bitopBITOP operation destkey key [key ...]summary: Perform bitwise operations between stringssince: 2.6.0group: bitmap127.0.0.1:6379 FLUSHALL
OK
127.0.0.1:6379 setbit k1 1 1
0
127.0.0.1:6379 setbit k1 7 1
0
127.0.0.1:6379 get k1
A
127.0.0.1:6379 setbit k2 1 1
0
127.0.0.1:6379 setbit k2 6 1
0
127.0.0.1:6379 get k2
B
127.0.0.1:6379 bitop and andkey k1 k2
1
127.0.0.1:6379 get andkey127.0.0.1:6379 bitop or orkey k1 k2
1
127.0.0.1:6379 get orkey
C
127.0.0.1:6379
ASCII
[rootlocalhost ~]# yum install man man-pages # 安装man man-pages
.....
[rootlocalhost ~]# man ascii
ASCII(7) Linux Programmers Manual ASCII(7)NAMEascii - ASCII character set encoded in octal, decimal, and hexadecimalDESCRIPTIONASCII is the American Standard Code for Information Interchange. It is a 7-bit code. Many 8-bit codes (such as ISO 8859-1, the Linux default character set) contain ASCII astheir lower half. The international counterpart of ASCII is known as ISO 646.The following table contains the 128 ASCII characters.C program \X escapes are noted.Oct Dec Hex Char Oct Dec Hex Char────────────────────────────────────────────────────────────────────────000 0 00 NUL \0 100 64 40 001 1 01 SOH (start of heading) 101 65 41 A002 2 02 STX (start of text) 102 66 42 B003 3 03 ETX (end of text) 103 67 43 C004 4 04 EOT (end of transmission) 104 68 44 D005 5 05 ENQ (enquiry) 105 69 45 E006 6 06 ACK (acknowledge) 106 70 46 F007 7 07 BEL \a (bell) 107 71 47 G010 8 08 BS \b (backspace) 110 72 48 H011 9 09 HT \t (horizontal tab) 111 73 49 I012 10 0A LF \n (new line) 112 74 4A J013 11 0B VT \v (vertical tab) 113 75 4B K014 12 0C FF \f (form feed) 114 76 4C L015 13 0D CR \r (carriage ret) 115 77 4D M016 14 0E SO (shift out) 116 78 4E N017 15 0F SI (shift in) 117 79 4F O020 16 10 DLE (data link escape) 120 80 50 P021 17 11 DC1 (device control 1) 121 81 51 Q022 18 12 DC2 (device control 2) 122 82 52 R023 19 13 DC3 (device control 3) 123 83 53 S024 20 14 DC4 (device control 4) 124 84 54 T025 21 15 NAK (negative ack.) 125 85 55 U026 22 16 SYN (synchronous idle) 126 86 56 V027 23 17 ETB (end of trans. blk) 127 87 57 W030 24 18 CAN (cancel) 130 88 58 X031 25 19 EM (end of medium) 131 89 59 Y032 26 1A SUB (substitute) 132 90 5A Z033 27 1B ESC (escape) 133 91 5B [034 28 1C FS (file separator) 134 92 5C \ \\035 29 1D GS (group separator) 135 93 5D ]036 30 1E RS (record separator) 136 94 5E ^037 31 1F US (unit separator) 137 95 5F _040 32 20 SPACE 140 96 60 041 33 21 ! 141 97 61 aManual page ascii(7) line 1 (press h for help or q to quit)
bitmap使用场景1.统计用户登录天数且窗口随机
#对user1用户进行登录统计 按照bitmap进行存储46字节存储了一个用户一年的是否登录
# 1 2....7..........364 #代表天数
# user1 0 1 ...1..........364
# user2 ......................
#....用户数...
127.0.0.1:6379 setbit user1 1 1
0
127.0.0.1:6379 setbit user1 7 1
0
127.0.0.1:6379 setbit user1 364 1
0
127.0.0.1:6379 STRLEN user1
46
127.0.0.1:6379 bitcount user1 -2 -1
1
127.0.0.1:6379
使用场景2:统计系统中的活跃用户1-3号之间的活跃用户总数
#统计20600101-20600103之间的用户活跃数,每一位代表一个用户
# u1 u2 u3 .....u7..u9.......
#20600101 0 1 0 ...0...0........
#20600102 0 1 0 ...0...1........
#20600103 0 0 0 ...1...0........
127.0.0.1:6379 setbit 20600101 1 1
0
127.0.0.1:6379 setbit 20600102 9 1
0
127.0.0.1:6379 setbit 20600102 1 1
0
127.0.0.1:6379 setbit 20600103 7 1
0
127.0.0.1:6379 bitop or destkey 20600101 20600102 20600103 #或 去重
2
127.0.0.1:6379 bitcount destkey 0 -1
3
127.0.0.1:6379
4、Hash: 散列
map(k-v)可对field进行数值计算
使用场景点赞收藏详情页
127.0.0.1:6379 help hashHDEL key field [field ...]summary: Delete one or more hash fieldssince: 2.0.0HEXISTS key fieldsummary: Determine if a hash field existssince: 2.0.0HGET key fieldsummary: Get the value of a hash fieldsince: 2.0.0HGETALL keysummary: Get all the fields and values in a hashsince: 2.0.0HINCRBY key field incrementsummary: Increment the integer value of a hash field by the given numbersince: 2.0.0HINCRBYFLOAT key field incrementsummary: Increment the float value of a hash field by the given amountsince: 2.6.0HKEYS keysummary: Get all the fields in a hashsince: 2.0.0HLEN keysummary: Get the number of fields in a hashsince: 2.0.0HMGET key field [field ...]summary: Get the values of all the given hash fieldssince: 2.0.0HMSET key field value [field value ...]summary: Set multiple hash fields to multiple valuessince: 2.0.0HRANDFIELD key [count [WITHVALUES]]summary: Get one or multiple random fields from a hashsince: 6.2.0HSCAN key cursor [MATCH pattern] [COUNT count]summary: Incrementally iterate hash fields and associated valuessince: 2.8.0HSET key field value [field value ...]summary: Set the string value of a hash fieldsince: 2.0.0HSETNX key field valuesummary: Set the value of a hash field, only if the field does not existsince: 2.0.0HSTRLEN key fieldsummary: Get the length of the value of a hash fieldsince: 3.2.0HVALS keysummary: Get all the values in a hashsince: 2.0.0127.0.0.1:6379 hset u1 name zwj
(integer) 1
127.0.0.1:6379 hmset u1 age 18 address dl
OK
127.0.0.1:6379 hget u1 name
zwj
127.0.0.1:6379 hmget u1 name age
1) zwj
2) 18
127.0.0.1:6379 hkeys u1
1) name
2) age
3) address
127.0.0.1:6379 hvals u1
1) zwj
2) 18
3) dl
127.0.0.1:6379 hgetall u1
1) name
2) zwj
3) age
4) 18
5) address
6) dl
127.0.0.1:6379 HINCRBYFLOAT u1 age 0.5
18.5
127.0.0.1:6379 hget u1 age
18.5
127.0.0.1:6379 HINCRBYFLOAT u1 age -1
17.5
127.0.0.1:6379 hget u1 age
17.5
127.0.0.1:6379
5、List: 列表
List可以描述栈同向命令
List可以描述队列反向命令
List可以描述数组
List阻塞单播队列 FIFO
127.0.0.1:6379 flushdb
OK
127.0.0.1:6379 keys *
(empty array)
127.0.0.1:6379 lpush k1 a b c d e f #lpush:从左边放元素
(integer) 6
127.0.0.1:6379 lpop k1
f
127.0.0.1:6379 lpop k1
e
127.0.0.1:6379 lpop k1
d
127.0.0.1:6379 lpush k1 a b c d e f
(integer) 6
127.0.0.1:6379 LRANGE k1 0 -1
1) f
2) e
3) d
4) c
5) b
6) a
127.0.0.1:6379 rpush k2 a b c d e f
(integer) 6
127.0.0.1:6379 LRANGE k2 0 -1
1) a
2) b
3) c
4) d
5) e
6) f
127.0.0.1:6379 help lindexLINDEX key index #根据索引取类似数组summary: Get an element from a list by its indexsince: 1.0.0group: list127.0.0.1:6379 help lsetLSET key index element #根据索引更新summary: Set the value of an element in a list by its indexsince: 1.0.0group: list127.0.0.1:6379 LRANGE k1 0 -1
1) f
2) e
3) d
4) c
5) b
6) a
127.0.0.1:6379 LINDEX k1 2
d
127.0.0.1:6379 LINDEX k1 -1
a
127.0.0.1:6379 lset k1 3 xxx
OK
127.0.0.1:6379 LRANGE k1 0 -1
1) f
2) e
3) d
4) xxx
5) b
6) a
127.0.0.1:6379 help listBLMOVE source destination LEFT|RIGHT LEFT|RIGHT timeoutsummary: Pop an element from a list, push it to another list and return it; or block until one is availablesince: 6.2.0BLMPOP timeout numkeys key [key ...] LEFT|RIGHT [COUNT count]summary: Pop elements from a list, or block until one is availablesince: 7.0.0BLPOP key [key ...] timeoutsummary: Remove and get the first element in a list, or block until one is ava ilablesince: 2.0.0BRPOP key [key ...] timeoutsummary: Remove and get the last element in a list, or block until one is avai lablesince: 2.0.0BRPOPLPUSH source destination timeoutsummary: Pop an element from a list, push it to another list and return it; or block until one is availablesince: 2.2.0LINDEX key indexsummary: Get an element from a list by its indexsince: 1.0.0LINSERT key BEFORE|AFTER pivot element # 插入元素在前/后summary: Insert an element before or after another element in a listsince: 2.2.0LLEN keysummary: Get the length of a listsince: 1.0.0LMOVE source destination LEFT|RIGHT LEFT|RIGHTsummary: Pop an element from a list, push it to another list and return itsince: 6.2.0LMPOP numkeys key [key ...] LEFT|RIGHT [COUNT count]summary: Pop elements from a listsince: 7.0.0LPOP key [count]summary: Remove and get the first elements in a listsince: 1.0.0LPOS key element [RANK rank] [COUNT num-matches] [MAXLEN len]summary: Return the index of matching elements on a listsince: 6.0.6LPUSH key element [element ...]summary: Prepend one or multiple elements to a listsince: 1.0.0LPUSHX key element [element ...]summary: Prepend an element to a list, only if the list existssince: 2.2.0LRANGE key start stopsummary: Get a range of elements from a listsince: 1.0.0LREM key count element #移除元素 count为正从头开始移除为负从后开始移除summary: Remove elements from a listsince: 1.0.0LSET key index elementsummary: Set the value of an element in a list by its indexsince: 1.0.0LTRIM key start stopsummary: Trim a list to the specified rangesince: 1.0.0RPOP key [count]summary: Remove and get the last elements in a listsince: 1.0.0RPOPLPUSH source destinationsummary: Remove the last element in a list, prepend it to another list and ret urn itsince: 1.2.0RPUSH key element [element ...]summary: Append one or multiple elements to a listsince: 1.0.0RPUSHX key element [element ...]summary: Append an element to a list, only if the list existssince: 2.2.0127.0.0.1:6379
6、Set: 集合
set去重
127.0.0.1:6379 help setSADD key member [member ...]summary: Add one or more members to a setsince: 1.0.0SCARD keysummary: Get the number of members in a setsince: 1.0.0SDIFF key [key ...]summary: Subtract multiple setssince: 1.0.0SDIFFSTORE destination key [key ...]summary: Subtract multiple sets and store the resulting set in a keysince: 1.0.0SINTER key [key ...]summary: Intersect multiple setssince: 1.0.0SINTERCARD numkeys key [key ...] [LIMIT limit]summary: Intersect multiple sets and return the cardinality of the resultsince: 7.0.0SINTERSTORE destination key [key ...]summary: Intersect multiple sets and store the resulting set in a keysince: 1.0.0SISMEMBER key membersummary: Determine if a given value is a member of a setsince: 1.0.0SMEMBERS keysummary: Get all the members in a setsince: 1.0.0SMISMEMBER key member [member ...]summary: Returns the membership associated with the given elements for a setsince: 6.2.0SMOVE source destination membersummary: Move a member from one set to anothersince: 1.0.0SPOP key [count]summary: Remove and return one or multiple random members from a setsince: 1.0.0SRANDMEMBER key [count]summary: Get one or multiple random members from a setsince: 1.0.0SREM key member [member ...]summary: Remove one or more members from a setsince: 1.0.0SSCAN key cursor [MATCH pattern] [COUNT count]summary: Incrementally iterate Set elementssince: 2.8.0SUNION key [key ...]summary: Add multiple setssince: 1.0.0SUNIONSTORE destination key [key ...]summary: Add multiple sets and store the resulting set in a keysince: 1.0.0127.0.0.1:6379 FLUSHALL
OK
127.0.0.1:6379 sadd k1 t a s d f fdsf we s t
(integer) 7
127.0.0.1:6379 SMEMBERS k1
1) fdsf
2) s
3) f
4) d
5) a
6) we
7) t
127.0.0.1:6379 SREM k1 s f #移除元素
(integer) 2
127.0.0.1:6379 SMEMBERS k1
1) fdsf
2) d
3) a
4) we
5) t
127.0.0.1:6379 sadd k2 1 2 3 4 5
(integer) 5
127.0.0.1:6379 sadd k3 4 5 6 7 8
(integer) 5
127.0.0.1:6379 SINTER k2 k3 #集合的交集
1) 4
2) 5
127.0.0.1:6379 SINTERSTORE k4 k2 k3 #集合的交集并存储到key中
(integer) 2
127.0.0.1:6379 SMEMBERS k4
1) 4
2) 5
127.0.0.1:6379 SDIFF k2 k3 #差集 前后顺序取前面的差集
1) 1
2) 2
3) 3
127.0.0.1:6379 SDIFF k3 k2 #差集
1) 6
2) 7
3) 8
127.0.0.1:6379 help SRANDMEMBERSRANDMEMBER key [count] #取出随机数 #正数:取出一个去重的结果集(不能超过已有集)#负数:取出一个带有重复的结果集一定满足你要的数量#0不返回#使用场景抽奖summary: Get one or multiple random members from a setsince: 1.0.0group: set127.0.0.1:6379 sadd k10 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
(integer) 33
127.0.0.1:6379 SRANDMEMBER k10 6 #模拟双色球等抽奖
1) 20
2) 9
3) 32
4) 29
5) 14
6) 6
127.0.0.1:6379 help SPOPSPOP key [count] #取出1个符合抽奖过程summary: Remove and return one or multiple random members from a setsince: 1.0.0group: set127.0.0.1:6379
使用场景抽奖
7、Sorted Set: 有序集合
Sorted Set物理内存左小右大不随命令发生变化
127.0.0.1:6379 help sorted-setBZMPOP timeout numkeys key [key ...] MIN|MAX [COUNT count]summary: Remove and return members with scores in a sorted set or block until one is availablesince: 7.0.0BZPOPMAX key [key ...] timeoutsummary: Remove and return the member with the highest score from one or more sorted sets, or block until one is availablesince: 5.0.0BZPOPMIN key [key ...] timeoutsummary: Remove and return the member with the lowest score from one or more sorted sets, or block until one is availablesince: 5.0.0ZADD key [NX|XX] [GT|LT] [CH] [INCR] score member [score member ...]summary: Add one or more members to a sorted set, or update its score if it already existssince: 1.2.0ZCARD keysummary: Get the number of members in a sorted setsince: 1.2.0ZCOUNT key min maxsummary: Count the members in a sorted set with scores within the given valuessince: 2.0.0ZDIFF numkeys key [key ...] [WITHSCORES]summary: Subtract multiple sorted setssince: 6.2.0ZDIFFSTORE destination numkeys key [key ...]summary: Subtract multiple sorted sets and store the resulting sorted set in a new keysince: 6.2.0ZINCRBY key increment membersummary: Increment the score of a member in a sorted setsince: 1.2.0ZINTER numkeys key [key ...] [WEIGHTS weight [weight ...]] [AGGREGATE SUM|MIN|MAX] [WITHSCORES]summary: Intersect multiple sorted setssince: 6.2.0ZINTERCARD numkeys key [key ...] [LIMIT limit]summary: Intersect multiple sorted sets and return the cardinality of the resultsince: 7.0.0ZINTERSTORE destination numkeys key [key ...] [WEIGHTS weight [weight ...]] [AGGREGATE SUM|MIN|MAX]summary: Intersect multiple sorted sets and store the resulting sorted set in a new keysince: 2.0.0ZLEXCOUNT key min maxsummary: Count the number of members in a sorted set between a given lexicographical rangesince: 2.8.9ZMPOP numkeys key [key ...] MIN|MAX [COUNT count]summary: Remove and return members with scores in a sorted setsince: 7.0.0ZMSCORE key member [member ...]summary: Get the score associated with the given members in a sorted setsince: 6.2.0ZPOPMAX key [count]summary: Remove and return members with the highest scores in a sorted setsince: 5.0.0ZPOPMIN key [count]summary: Remove and return members with the lowest scores in a sorted setsince: 5.0.0ZRANDMEMBER key [count [WITHSCORES]]summary: Get one or multiple random elements from a sorted setsince: 6.2.0ZRANGE key start stop [BYSCORE|BYLEX] [REV] [LIMIT offset count] [WITHSCORES]summary: Return a range of members in a sorted setsince: 1.2.0ZRANGEBYLEX key min max [LIMIT offset count]summary: Return a range of members in a sorted set, by lexicographical rangesince: 2.8.9ZRANGEBYSCORE key min max [WITHSCORES] [LIMIT offset count]summary: Return a range of members in a sorted set, by scoresince: 1.0.5ZRANGESTORE dst src min max [BYSCORE|BYLEX] [REV] [LIMIT offset count]summary: Store a range of members from sorted set into another keysince: 6.2.0ZRANK key membersummary: Determine the index of a member in a sorted setsince: 2.0.0ZREM key member [member ...]summary: Remove one or more members from a sorted setsince: 1.2.0ZREMRANGEBYLEX key min maxsummary: Remove all members in a sorted set between the given lexicographical rangesince: 2.8.9ZREMRANGEBYRANK key start stopsummary: Remove all members in a sorted set within the given indexessince: 2.0.0ZREMRANGEBYSCORE key min maxsummary: Remove all members in a sorted set within the given scoressince: 1.2.0ZREVRANGE key start stop [WITHSCORES]summary: Return a range of members in a sorted set, by index, with scores ordered from high to lowsince: 1.2.0ZREVRANGEBYLEX key max min [LIMIT offset count]summary: Return a range of members in a sorted set, by lexicographical range, ordered from higher to lower strings.since: 2.8.9ZREVRANGEBYSCORE key max min [WITHSCORES] [LIMIT offset count]summary: Return a range of members in a sorted set, by score, with scores ordered from high to lowsince: 2.2.0ZREVRANK key membersummary: Determine the index of a member in a sorted set, with scores ordered from high to lowsince: 2.0.0ZSCAN key cursor [MATCH pattern] [COUNT count]summary: Incrementally iterate sorted sets elements and associated scoressince: 2.8.0ZSCORE key membersummary: Get the score associated with the given member in a sorted setsince: 1.2.0ZUNION numkeys key [key ...] [WEIGHTS weight [weight ...]] [AGGREGATE SUM|MIN|MAX] [WITHSCORES]summary: Add multiple sorted setssince: 6.2.0ZUNIONSTORE destination numkeys key [key ...] [WEIGHTS weight [weight ...]] [AGGREGATE SUM|MIN|MAX]summary: Add multiple sorted sets and store the resulting sorted set in a new keysince: 2.0.0127.0.0.1:6379 FLUSHALL
OK
127.0.0.1:6379 zadd k1 8 apple 2 banana 3 orange
(integer) 3
127.0.0.1:6379 ZRANGE k1 0 -1
1) banana
2) orange
3) apple
127.0.0.1:6379 ZRANGE k1 0 -1 withscores
1) banana
2) 2
3) orange
4) 3
5) apple
6) 8
127.0.0.1:6379 ZINCRBY k1 2.5 banana
4.5
127.0.0.1:6379 ZRANGE k1 0 -1 withscores
1) -1
2) 0
3) orange
4) 3
5) banana
6) 4.5
7) apple
8) 8
127.0.0.1:6379 zrem k1 -1
(integer) 1
127.0.0.1:6379 ZRANGE k1 0 -1 withscores
1) orange
2) 3
3) banana
4) 4.5
5) apple
6) 8
127.0.0.1:6379 FLUSHALL
OK
127.0.0.1:6379 zadd k1 80 a 60 b 70 c
(integer) 3
127.0.0.1:6379 zadd k2 60 b 100 d 40 e
(integer) 3
127.0.0.1:6379 ZUNIONSTORE k3 2 k1 k2
(integer) 5
127.0.0.1:6379 ZRANGE k3 0 -1 withscores1) e2) 403) c4) 705) a6) 807) d8) 1009) b
10) 120
127.0.0.1:6379 ZUNIONSTORE k4 2 k1 k2 weights 1 0.5 # 并集 权重
(integer) 5
127.0.0.1:6379 ZRANGE k4 0 -1 withscores 1) e2) 203) d4) 505) c6) 707) a8) 809) b
10) 90
127.0.0.1:6379 ZUNIONSTORE k4 2 k1 k2 aggregate max # 并集 取最大值
(integer) 5
127.0.0.1:6379 ZRANGE k4 0 -1 withscores1) e2) 403) b4) 605) c6) 707) a8) 809) d
10) 100
127.0.0.1:6379 ZRANGE k4 0 -1
1) e
2) b
3) c
4) a
5) d
Sorted Set排序是怎么实现的增删改查的速度--skip list:跳跃表 干我们这行啥时候懈怠就意味着长进的停止长进的停止就意味着被淘汰只能往前冲直到凤凰涅槃的一天
