Elasticache / Redis Timestamp of new data

Question

Does Elasticache store the time when a data is added to the cache? I want to filter data on my cache based on the time it was added but I can't find a clear answer if this information is stored in Elasticache automatically or if I have to add this information (timestamp) manually for each data inserted in the cache?

Thanks!

You can't filter data by time on Redis, do you want to filter by exact time or by range? — Guy Korland, Mar 24 '20 at 09:48
So you should be able to encode this data on the client perhaps part of the key — Guy Korland, Mar 24 '20 at 13:22

score 0 · Answer 1 · answered Mar 25 '20 at 04:33

Neither Redis nor ElastiCache's Redis-compatible service store the timestamp automatically.

This would be inneficient as many use causes don't require it, so it's a client application implementation detail.

You may use a sorted set to store this information, so you can query for date ranges. And you can use Redis server time automatically if you use a Lua script. See How to store in Redis sorted set with server-side timestamp as score?.

This is particularly important if you have multiple nodes connecting, as they may have clock differences.

Elasticache / Redis Timestamp of new data

1 Answers1