147 lines
5.4 KiB
Markdown
147 lines
5.4 KiB
Markdown
# Redis client for Golang
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[](https://travis-ci.org/go-redis/redis)
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[](https://godoc.org/github.com/go-redis/redis)
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[](https://airbrake.io)
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Supports:
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- Redis 3 commands except QUIT, MONITOR, SLOWLOG and SYNC.
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- Automatic connection pooling with [circuit breaker](https://en.wikipedia.org/wiki/Circuit_breaker_design_pattern) support.
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- [Pub/Sub](https://godoc.org/github.com/go-redis/redis#PubSub).
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- [Transactions](https://godoc.org/github.com/go-redis/redis#Multi).
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- [Pipeline](https://godoc.org/github.com/go-redis/redis#example-Client-Pipeline) and [TxPipeline](https://godoc.org/github.com/go-redis/redis#example-Client-TxPipeline).
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- [Scripting](https://godoc.org/github.com/go-redis/redis#Script).
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- [Timeouts](https://godoc.org/github.com/go-redis/redis#Options).
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- [Redis Sentinel](https://godoc.org/github.com/go-redis/redis#NewFailoverClient).
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- [Redis Cluster](https://godoc.org/github.com/go-redis/redis#NewClusterClient).
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- [Cluster of Redis Servers](https://godoc.org/github.com/go-redis/redis#example-NewClusterClient--ManualSetup) without using cluster mode and Redis Sentinel.
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- [Ring](https://godoc.org/github.com/go-redis/redis#NewRing).
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- [Instrumentation](https://godoc.org/github.com/go-redis/redis#ex-package--Instrumentation).
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- [Cache friendly](https://github.com/go-redis/cache).
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- [Rate limiting](https://github.com/go-redis/redis_rate).
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- [Distributed Locks](https://github.com/bsm/redis-lock).
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API docs: https://godoc.org/github.com/go-redis/redis.
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Examples: https://godoc.org/github.com/go-redis/redis#pkg-examples.
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## Installation
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Install:
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```shell
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go get -u github.com/go-redis/redis
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```
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Import:
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```go
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import "github.com/go-redis/redis"
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```
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## Quickstart
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```go
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func ExampleNewClient() {
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client := redis.NewClient(&redis.Options{
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Addr: "localhost:6379",
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Password: "", // no password set
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DB: 0, // use default DB
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})
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pong, err := client.Ping().Result()
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fmt.Println(pong, err)
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// Output: PONG <nil>
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}
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func ExampleClient() {
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err := client.Set("key", "value", 0).Err()
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if err != nil {
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panic(err)
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}
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val, err := client.Get("key").Result()
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if err != nil {
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panic(err)
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}
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fmt.Println("key", val)
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val2, err := client.Get("key2").Result()
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if err == redis.Nil {
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fmt.Println("key2 does not exist")
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} else if err != nil {
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panic(err)
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} else {
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fmt.Println("key2", val2)
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}
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// Output: key value
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// key2 does not exist
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}
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```
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## Howto
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Please go through [examples](https://godoc.org/github.com/go-redis/redis#pkg-examples) to get an idea how to use this package.
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## Look and feel
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Some corner cases:
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```go
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// SET key value EX 10 NX
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set, err := client.SetNX("key", "value", 10*time.Second).Result()
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// SORT list LIMIT 0 2 ASC
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vals, err := client.Sort("list", redis.Sort{Offset: 0, Count: 2, Order: "ASC"}).Result()
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// ZRANGEBYSCORE zset -inf +inf WITHSCORES LIMIT 0 2
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vals, err := client.ZRangeByScoreWithScores("zset", redis.ZRangeBy{
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Min: "-inf",
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Max: "+inf",
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Offset: 0,
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Count: 2,
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}).Result()
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// ZINTERSTORE out 2 zset1 zset2 WEIGHTS 2 3 AGGREGATE SUM
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vals, err := client.ZInterStore("out", redis.ZStore{Weights: []int64{2, 3}}, "zset1", "zset2").Result()
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// EVAL "return {KEYS[1],ARGV[1]}" 1 "key" "hello"
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vals, err := client.Eval("return {KEYS[1],ARGV[1]}", []string{"key"}, "hello").Result()
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```
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## Benchmark
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go-redis vs redigo:
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```
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BenchmarkSetGoRedis10Conns64Bytes-4 200000 7621 ns/op 210 B/op 6 allocs/op
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BenchmarkSetGoRedis100Conns64Bytes-4 200000 7554 ns/op 210 B/op 6 allocs/op
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BenchmarkSetGoRedis10Conns1KB-4 200000 7697 ns/op 210 B/op 6 allocs/op
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BenchmarkSetGoRedis100Conns1KB-4 200000 7688 ns/op 210 B/op 6 allocs/op
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BenchmarkSetGoRedis10Conns10KB-4 200000 9214 ns/op 210 B/op 6 allocs/op
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BenchmarkSetGoRedis100Conns10KB-4 200000 9181 ns/op 210 B/op 6 allocs/op
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BenchmarkSetGoRedis10Conns1MB-4 2000 583242 ns/op 2337 B/op 6 allocs/op
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BenchmarkSetGoRedis100Conns1MB-4 2000 583089 ns/op 2338 B/op 6 allocs/op
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BenchmarkSetRedigo10Conns64Bytes-4 200000 7576 ns/op 208 B/op 7 allocs/op
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BenchmarkSetRedigo100Conns64Bytes-4 200000 7782 ns/op 208 B/op 7 allocs/op
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BenchmarkSetRedigo10Conns1KB-4 200000 7958 ns/op 208 B/op 7 allocs/op
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BenchmarkSetRedigo100Conns1KB-4 200000 7725 ns/op 208 B/op 7 allocs/op
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BenchmarkSetRedigo10Conns10KB-4 100000 18442 ns/op 208 B/op 7 allocs/op
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BenchmarkSetRedigo100Conns10KB-4 100000 18818 ns/op 208 B/op 7 allocs/op
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BenchmarkSetRedigo10Conns1MB-4 2000 668829 ns/op 226 B/op 7 allocs/op
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BenchmarkSetRedigo100Conns1MB-4 2000 679542 ns/op 226 B/op 7 allocs/op
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```
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Redis Cluster:
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```
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BenchmarkRedisPing-4 200000 6983 ns/op 116 B/op 4 allocs/op
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BenchmarkRedisClusterPing-4 100000 11535 ns/op 117 B/op 4 allocs/op
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```
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## See also
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- [Golang PostgreSQL ORM](https://github.com/go-pg/pg)
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- [Golang msgpack](https://github.com/vmihailenco/msgpack)
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- [Golang message task queue](https://github.com/go-msgqueue/msgqueue)
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