HyperLogLog Implementation on Redis Not Recognized

Question

I'm trying to run a simple code here which simply inserts a value into a key using the PFADD operation but I get this error:

ResponseError: unknown command 'PFADD'

My code is as follows:

import pandas as pd
import redis
r = redis.StrictRedis(host='localhost', port=6379, db=0)
r.pfadd("k", 2, 3, 4, 4, 5, 6, 7, 3, 4,)

Python version: 2
Pandas version: 0.19.0
Redis Version: 2.10.5`

Am I missing something here?

score 1 · Accepted Answer · edited Jun 20 '20 at 09:12

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Issue a r.execute_command("PFADD", "key", 1, 2, 3) to see if your server supports the command.

If this command runs ok, then the issue is with redis-py.

Edit

http://redis.io/commands/pfadd was added in Redis 2.8.9, your version is older than this.

You probably can do your stuff using http://redis.io/commands/sadd, which is supported in early versions. Check this link and try the set commands. They are slower in counting members, but are deterministic.

edited Jun 20 '20 at 09:12

Community

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answered Nov 22 '16 at 22:45

Niloct

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tried that, but didn't work either. It used to work fine until that one fine day it just stopped. – Augmented Jacob Nov 22 '16 at 22:57
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If this doesn't work, go to shell of your machine, issue `redis-cli`, then inside type `info`. One of first lines of output will be `redis_version:`. This line should have a listed value greater than or equal to `2.8.9`. – Niloct Nov 22 '16 at 23:03
looks like it is 2.6.9 – Augmented Jacob Nov 22 '16 at 23:21

HyperLogLog Implementation on Redis Not Recognized

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