Redis supports mass insert via redis-cli --pipe, but commands need to be written in redis protocol. For more details, check out the Redis mass insertion page. This script takes care of converting ordinary redis commands to redis protocol.
#!/usr/bin/env bash
while read CMD; do
# each command begins with *{number arguments in command}\r\n
XS=($CMD); printf "*${#XS[@]}\r\n"
# for each argument, we append ${length}\r\n{argument}\r\n
for X in $CMD; do printf "\$${#X}\r\n$X\r\n"; done