'Redis sequential unique id generation for distributed clients
I need to generate sequential unique IDs for distributed clients.
- I considered Redis in standalone mode, Jedis client, INCR command to
increment a counter value against a key shared by all the
clients. AOF
alwaysoption enabled. This option is not good because of the standalone Redis server being SPOF and hence downtime for the clients. - The master and replicas with Sentinels setup is also not foolproof
because there will always be a replication lag. It is not guaranteed
that in case of master failure, there would be no data lag. I don't want to use the
WAITcommand to block in unbounded fashion. Consequently, the replicas would be slightly lagged and hence possible duplicate values might be visible to the clients.
Considering that, is Redis reliable for generating unique id sequence for concurrent clients?
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