I have a redis set. This set can store 20 members maximum(added withSADD
command).
My problem is ; I need to update that members when needed. Members need that modification maximum 10 times for every member. Set members are json as a string. There is only solutoin on my mind nor, get all members update and recreate that set again. But it seems iditoic.
I know there is ZADD
sorted set with its score support it seems suitable also I need to update score like data in json , but i just wonder Is there any method updating members in efficient way, or is updating member not acceptable on redis way ?
Note: Redis datastore is using by both node.js and java clients.
Set members themselves are immutable - you can add new members or remove existing ones. That's it.
Given that a set is an unordered collection of unique members, consider the possible outcomes were set members theoretically modifiable when the new value for a member:
- is identical to the old value - no change to the set
- already exists in the set - equivalent to deleting that member
- isn't 1 or 2 - equivalent to deleting the member and adding a new one
来源:https://stackoverflow.com/questions/32927213/efficient-way-redis-set-member-update