Redis how to persist multiple keys at once - redis

Question

In Redis, is it possible to call PERSIST on multiple keys at once? For example, say I have the following commands:
MULTI
SETEX mykey 10 "foo"
SETEX myotherkey 10 "bar"
EXEC
// wait x number of seconds
PERSIST mykey
PERSIST myotherkey
I want to guarantee that either mykey and myotherkey are both persisted, or are both expired.
In theory at least, in the example above if the two PERSIST commands were run after waiting almost exactly 10 seconds, then it's possible that only one of them succeed in persisting the key, right? And I doubt that wrapping the two PERSIST commands in MULTI/EXEC helps since the commands themselves will still succeed even if only one of the keys is actually persisted.

Answer 1

persist returns
1: if the timeout is removed
0: if the key doesn't exists or doesn't have a TTL.
In the transaction even one of the key doesn't have an expire time, the other key will be persisted.
I set firstkey with the TTL of 300 seconds, secondkey without the TTL.
127.0.0.1:6379> setex firstkey 300 val
OK
127.0.0.1:6379> set secondkey val
OK
127.0.0.1:6379> multi
OK
127.0.0.1:6379> persist firstkey
QUEUED
127.0.0.1:6379> persist secondkey
QUEUED
127.0.0.1:6379> exec
1) (integer) 1
2) (integer) 0
127.0.0.1:6379> ttl firstkey
(integer) -1
127.0.0.1:6379> ttl secondkey
(integer) -1
127.0.0.1:6379>
When exec is issued, the order of responses are the same as the commands issued. firstkey is persisted(1) and secondkey already persisted(0) since it didn't have a timeout. Both doesn't have any timeout since the TTL returns -1.