# Changelog

## v8 (unreleased)

- All commands require `context.Context` as a first argument, e.g.
  `rdb.Ping(ctx)`. If you are not using `context.Context` yet, the simplest
  option is to define package variable `var ctx = context.TODO()` and use it
  when `ctx` is expected.
- Ring uses Rendezvous Hashing by default which provides better distribution.
  This means that existing keys must be moved to a new location or key will be
  inaccessible / lost. To use old hashing scheme:

```go
import "github.com/golang/groupcache/consistenthash"

ring := redis.NewRing(&redis.RingOptions{
    NewConsistentHash: func() {
        return consistenthash.New(100, crc32.ChecksumIEEE)
    },
})
```

- Basic support for OpenTelemetry instrumentation.

## v7.3

- New option `Options.Username` which causes client to use `AuthACL`. Be aware
  if your connection URL contains username.

## v7.2

- Existing `HMSet` is renamed to `HSet` and old deprecated `HMSet` is restored
  for Redis 3 users.

## v7.1

- Existing `Cmd.String` is renamed to `Cmd.Text`. New `Cmd.String` implements
  `fmt.Stringer` interface.

## v7

- _Important_. Tx.Pipeline now returns a non-transactional pipeline. Use
  Tx.TxPipeline for a transactional pipeline.
- WrapProcess is replaced with more convenient AddHook that has access to
  context.Context.
- WithContext now can not be used to create a shallow copy of the client.
- New methods ProcessContext, DoContext, and ExecContext.
- Client respects Context.Deadline when setting net.Conn deadline.
- Client listens on Context.Done while waiting for a connection from the pool
  and returns an error when context context is cancelled.
- Add PubSub.ChannelWithSubscriptions that sends `*Subscription` in addition to
  `*Message` to allow detecting reconnections.
- `time.Time` is now marshalled in RFC3339 format. `rdb.Get("foo").Time()`
  helper is added to parse the time.
- `SetLimiter` is removed and added `Options.Limiter` instead.
- `HMSet` is deprecated as of Redis v4.

## v6.15

- Cluster and Ring pipelines process commands for each node in its own
  goroutine.

## 6.14

- Added Options.MinIdleConns.
- Added Options.MaxConnAge.
- PoolStats.FreeConns is renamed to PoolStats.IdleConns.
- Add Client.Do to simplify creating custom commands.
- Add Cmd.String, Cmd.Int, Cmd.Int64, Cmd.Uint64, Cmd.Float64, and Cmd.Bool
  helpers.
- Lower memory usage.

## v6.13

- Ring got new options called `HashReplicas` and `Hash`. It is recommended to
  set `HashReplicas = 1000` for better keys distribution between shards.
- Cluster client was optimized to use much less memory when reloading cluster
  state.
- PubSub.ReceiveMessage is re-worked to not use ReceiveTimeout so it does not
  lose data when timeout occurres. In most cases it is recommended to use
  PubSub.Channel instead.
- Dialer.KeepAlive is set to 5 minutes by default.

## v6.12

- ClusterClient got new option called `ClusterSlots` which allows to build
  cluster of normal Redis Servers that don't have cluster mode enabled. See
  https://godoc.org/github.com/go-redis/redis#example-NewClusterClient--ManualSetup