redis/go-redis
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Use Rendezvous in Ring. Thanks @rafaeleyng for initial idea and implementation

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This commit is contained in:
Vladimir Mihailenco
2020-06-08 12:42:43 +03:00
parent 10561b3aa4
commit 694e518a8c
8 changed files with 178 additions and 306 deletions
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24
ring_test.go
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@ -54,8 +54,8 @@ var _ = Describe("Redis Ring", func() {
setRingKeys()
// Both shards should have some keys now.
Expect(ringShard1.Info(ctx, "keyspace").Val()).To(ContainSubstring("keys=57"))
Expect(ringShard2.Info(ctx, "keyspace").Val()).To(ContainSubstring("keys=43"))
Expect(ringShard1.Info(ctx, "keyspace").Val()).To(ContainSubstring("keys=56"))
Expect(ringShard2.Info(ctx, "keyspace").Val()).To(ContainSubstring("keys=44"))
})
It("distributes keys when using EVAL", func() {
@ -71,8 +71,8 @@ var _ = Describe("Redis Ring", func() {
Expect(err).NotTo(HaveOccurred())
}
Expect(ringShard1.Info(ctx, "keyspace").Val()).To(ContainSubstring("keys=57"))
Expect(ringShard2.Info(ctx, "keyspace").Val()).To(ContainSubstring("keys=43"))
Expect(ringShard1.Info(ctx, "keyspace").Val()).To(ContainSubstring("keys=56"))
Expect(ringShard2.Info(ctx, "keyspace").Val()).To(ContainSubstring("keys=44"))
})
It("uses single shard when one of the shards is down", func() {
@ -100,7 +100,7 @@ var _ = Describe("Redis Ring", func() {
setRingKeys()
// RingShard2 should have its keys.
Expect(ringShard2.Info(ctx, "keyspace").Val()).To(ContainSubstring("keys=43"))
Expect(ringShard2.Info(ctx, "keyspace").Val()).To(ContainSubstring("keys=44"))
})
It("supports hash tags", func() {
@ -131,8 +131,8 @@ var _ = Describe("Redis Ring", func() {
}
// Both shards should have some keys now.
Expect(ringShard1.Info(ctx).Val()).To(ContainSubstring("keys=57"))
Expect(ringShard2.Info(ctx).Val()).To(ContainSubstring("keys=43"))
Expect(ringShard1.Info(ctx).Val()).To(ContainSubstring("keys=56"))
Expect(ringShard2.Info(ctx).Val()).To(ContainSubstring("keys=44"))
})
It("is consistent with ring", func() {
@ -427,22 +427,22 @@ var _ = Describe("Ring watch", func() {
It("should discard", func() {
err := ring.Watch(ctx, func(tx *redis.Tx) error {
cmds, err := tx.TxPipelined(ctx, func(pipe redis.Pipeliner) error {
pipe.Set(ctx, "key1", "hello1", 0)
pipe.Set(ctx, "{shard}key1", "hello1", 0)
pipe.Discard()
pipe.Set(ctx, "key2", "hello2", 0)
pipe.Set(ctx, "{shard}key2", "hello2", 0)
return nil
})
Expect(err).NotTo(HaveOccurred())
Expect(cmds).To(HaveLen(1))
return err
}, "key1", "key2")
}, "{shard}key1", "{shard}key2")
Expect(err).NotTo(HaveOccurred())
get := ring.Get(ctx, "key1")
get := ring.Get(ctx, "{shard}key1")
Expect(get.Err()).To(Equal(redis.Nil))
Expect(get.Val()).To(Equal(""))
get = ring.Get(ctx, "key2")
get = ring.Get(ctx, "{shard}key2")
Expect(get.Err()).NotTo(HaveOccurred())
Expect(get.Val()).To(Equal("hello2"))
})