A call to Fetch after TagAsDeleted returns an old value

[hoslo]

client := redis.NewClient(&redis.Options{
		Addr:         "localhost:6379",
		Password:     "",
		DB:           0, // use default DB
	})
rc := rockscache.NewClient(client, rockscache.NewDefaultOptions())
rc.Fetch("test1", 60 * time.Second, func () (string, error) {
return "test1", nil
})
rc.TagAsDeleted("test1")
value, _ := rc.Fetch("test1", 60 * time.Second, func () (string, error) {
return "test2", nil
})
fmt.Println("value:", value)  // except return "test2", but got "test1"

[Wanghongw]

you need set StrongConsistency to true,like this: rc.Options.StrongConsistency = true

[Wanghongw]

client := redis.NewClient(&redis.Options{ Addr: "localhost:6379", Password: "", DB: 0, // use default DB }) rc := rockscache.NewClient(client, rockscache.NewDefaultOptions()) // enable strongConsistency rc.Options.StrongConsistency = true rc.Fetch("test1", 60 * time.Second, func () (string, error) { return "test1", nil }) rc.TagAsDeleted("test1") value, _ := rc.Fetch("test1", 60 * time.Second, func () (string, error) { return "test2", nil }) fmt.Println("value:", value)

[hoslo]

I think strongConsistency should default to true, otherwise my above result would look like something was wrong @Wanghongw

[yedf2]

For most cache system, they are eventual consistency, not strong consistency.

In most cases, performance is the most important

Performance of strong consistency is lower than eventual consistency