Redis Note

1) remove all keys with prefix
for key in `echo 'KEYS sectionId_*' | redis-cli | awk '{print $1}'`
 do echo DEL $key
done | redis-cli

Reset ttl
for key in `echo 'KEYS *' \| redis-cli \| awk '{print $1}'`
do
echo expire $key 86400
done | redis-cli