CODEWITHSUNDEEP
redisredis-cli
Shankar
Shankar

Reputation: 2835

How to identify Redis keys from Redis-cli monitor command?

Possibly related to - Redis command to get all available keys?

I have a Redis server storing SixPack data (https://github.com/sixpack/sixpack - a framework to enable A/B testing). I can monitor the Redis server and see the following sample entries when I run monitor command:

$ redis-cli monitor|grep 'TEST'

I can see that there are several keys being used/set. I am attaching a sample below:

1581720438.878978 [15 127.0.0.1:39722] "GETBIT" "sixpack:e:-28591_:excluded" "2307"
1581720439.623866 [15 127.0.0.1:39722] "LRANGE" "sixpack:e:-28003_:alternatives" "0" "-1"
1581720439.624209 [15 127.0.0.1:39722] "HGET" "sixpack:e:-28003_" "traffic_fraction"
1581720439.624557 [15 127.0.0.1:39722] "GET" "sixpack:e:-28003_:winner"
1581720439.624822 [15 127.0.0.1:39722] "HEXISTS" "sixpack:e:-28003_" "archived"
1581720439.625110 [15 127.0.0.1:39722] "EVALSHA" "bcbf3b3ac336a33c2cd7ad0e1fca28db7b49fdee" "1" "sixpack:e:-28003_Recapture:users" "ac945bf7-285e-4f69-83fd-1336e084a318"

However, when I try to access the keys by running $ redis-cli KEYS '*' command, I only get an empty list (empty list or set).

Updated: I checked that this is not a cluster setup. I also check the DBSIZE command. It returns 0.

How can I derive the keys from the MONITOR output? Is there a way to get all the keys in a Redis CLI?

Upvotes: 0

Views: 3469

Answers (2)

Alister Bulman
Alister Bulman

Reputation: 35169

The appropriate database index should be used when running the KEYS command if more than one Redis database is in use.

$redis-cli -n <DB number> KEYS '*' # or use --scan

Redis comes with 16 default 'databases' which can be used to split the keys up. To use them from the tool, redis-cli -n 2 to start using the 3rd DB (the default is 0). Once inside the tool, or from the API, there is the SELECT 2 command (again, to select the db to use). More can be allowed for - it's just a number in the redis.conf file.

The Sixpack A/B testing tool configuration has two methods to be able to choose which Redis database to use - in the configuration is the key (eg) redis_db: 15, or it, and more can be set by environment variable: SIXPACK_CONFIG_REDIS_DB, along with _PORT, _HOST, _PASSWORD & _PREFIX.

Upvotes: 2

Shankar
Shankar

Reputation: 2835

Based on the hint from @AlisterBulman, I ran the INFO command like this.

 $ redis-cli INFO | grep keys

From the output I can see that the DB number '15' has the keys.

db15:keys=300869,expires=0,avg_ttl=0

Then I ran this command to get the keys.

$ redis-cli -n 15 KEYS '*'

Upvotes: 1

Related Questions