22-6-25---transactions-in-redis.md

###Transactions in Redis

June 26th 2022

https://redis.io/docs/manual/transactions/

• MULTI:

  • A Redis Transaction is entered using the MULTI command. The command always replies with OK.
  • redis queues all the commands u entered
  • Finally executed -> when EXEC is called

• EXEC : returns an array of replies

• DISCARD : to abort a transaction

• WATCH: to provide a check-and-set (CAS) behavior to Redis transactions.

  • WATCHed keys are monitored in order to detect changes against them. If at least one watched key is modified before the EXEC command, the whole transaction aborts