Differences with Redis

String lengths, indices.

String sizes are limited to 256MB. Indices (say in GETRANGE and SETRANGE commands) should be signed 32 bit integers in range [-2147483647, 2147483648].

String handling.

SORT does not take any locale into account.

Expiry ranges.

Expirations are limited to 8 years. For commands with millisecond precision like PEXPIRE or PSETEX, expirations greater than $2^{28}$ms are quietly rounded to the nearest second losing precision of less than 0.001%.

Lua

We use lua 5.4.4 that has been released in 2022. That means we also support lua integers.