two memcache libraries in golang
Mar092014
跟其他语言一样，golang除了可以连接数据库（mysql）之外，也可以连接redis，memcache等基于内存的数据库，下面介绍两种golang的memcache库，名字都叫做gomemcache。
(1) bradfitz/gomemcache
install
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go get -u github.com/bradfitz/gomemcache/memcache |
或者
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$ git clone git://github.com/bradfitz/gomemcache $ cd gomemcache/memcache $ make install |
测试页面：
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cat go_memcache.go package main import ( "fmt" "github.com/bradfitz/gomemcache/memcache" ) func main() { mc := memcache.New("127.0.0.1:11211") mc.Set(&memcache.Item{Key: "siteName", Value: []byte("sudops.com")}) //mc.Delete("siteName") v,err := mc.Get("siteName") fmt.Printf("%s\n ", v) fmt.Println(err) } go run gomem.go &{siteName sudops.com <nil> %!s(uint32=0) %!s(int32=0) %!s(uint64=17)} <nil> |
不好理解的是golang中memcache的value的数据类型是[]byte.
直接打印出来是这样：
&{siteName [115 117 100 111 112 115 46 99 111 109]
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type Item struct { // Key is the Item's key (250 bytes maximum). Key string // Value is the Item's value. Value []byte // Object is the Item's value for use with a Codec. Object interface{} // Flags are server-opaque flags whose semantics are entirely // up to the app. Flags uint32 // Expiration is the cache expiration time, in seconds: either a relative // time from now (up to 1 month), or an absolute Unix epoch time. // Zero means the Item has no expiration time. Expiration int32 // contains filtered or unexported fields } Item is an item to be got or stored in a memcached server. |
memcache stats
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stats STAT pid 12516 STAT uptime 22471 STAT time 1394321553 STAT version 1.4.17 STAT libevent 1.4.13-stable STAT pointer_size 64 STAT rusage_user 0.422935 STAT rusage_system 0.518921 STAT curr_connections 10 STAT total_connections 30 STAT connection_structures 11 STAT reserved_fds 20 STAT cmd_get 18 STAT cmd_set 18 STAT cmd_flush 0 STAT cmd_touch 0 STAT get_hits 17 STAT get_misses 1 STAT delete_misses 0 STAT delete_hits 1 STAT incr_misses 0 STAT incr_hits 0 STAT decr_misses 0 STAT decr_hits 0 STAT cas_misses 0 STAT cas_hits 0 STAT cas_badval 0 STAT touch_hits 0 STAT touch_misses 0 STAT auth_cmds 0 STAT auth_errors 0 STAT bytes_read 795 STAT bytes_written 1803 STAT limit_maxbytes 67108864 STAT accepting_conns 1 STAT listen_disabled_num 0 STAT threads 4 STAT conn_yields 0 STAT hash_power_level 16 STAT hash_bytes 524288 STAT hash_is_expanding 0 STAT malloc_fails 0 STAT bytes 155 STAT curr_items 2 STAT total_items 18 STAT expired_unfetched 0 STAT evicted_unfetched 0 STAT evictions 0 STAT reclaimed 0 END |
(2)kklis/gomemcache
INSTALL
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go get -u github.com/kklis/gomemcache |
样例：
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cat go_mem.go package main import ( "fmt" "github.com/kklis/gomemcache" ) func main() { memc, err := gomemcache.Connect("127.0.0.1", 11211) if err != nil { panic(err) } err = memc.Set("siteName", []uint8("sudops.com"), 0, 0) if err != nil { panic(err) } val, fl, _ := memc.Get("siteName") fmt.Printf("%s %d\n", val, fl) } |
运行结果：
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go run go_mem.go sudops.com 0 |
本文固定链接: https://www.sudops.com/two-memcache-libraries-golang.html | 运维·速度
two memcache libraries in golang：等您坐沙发呢！
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