Is it safe to dump and restore redis bloom filter to other databases like MongoDB

[darkframemaster]

The reason why I want to do this is that we have a lot of cold data and it takes a lot of memory. I've tried Redis server v5.0.8 and the server crushed as described here redis bloom issue#672, I also tried v=6.2.13 the latest release of redis/redis-stack-server, and It appears to be functioning, but actually we are using v5.0.8 in production. So I want to know:

• Is it safe to dump the bloom filter to other databases like MongoDB and restore it?
• Can I dump and load them between different Redis versions?

Below is the pseudocode I used for testing:

items := bson.A{}
var iterPointer int64 = 0
for {
	iter, data, err := rb.BfScanDump(key, iterPointer)
	iterPointer = iter
	if err != nil {
		return items, err
	}
	if iter == 0 {
		break
	}

	items = append(items, bson.M{"iter": iter, "data": hex.EncodeToString(data)})
}

// then store it in Mongo, and read the items out and hex.DecodeString(data) to restore it.

Any suggestion or help would be appreciated!

[sundb]

• Can I dump and load them between different Redis versions?

Sure, redis is always backwards compatible with rdb.
However, I would recommend that you get more accurate information from https://github.com/RedisBloom/RedisBloom, as we can't guarantee that modules will always be backward compatible.

[darkframemaster]

Thanks! Do you have any suggestions about the first question?

[sundb]

I do not expect with RedisBloom.
What I can initially think of is using the BF.SCANDUMP command to dump the data and migrate it to mongodb, but I can't be sure that their formats aren't necessarily compatible.
Need more help from other guys.