string¶

string can be use to cache three types of values.

• Byte string values

• Integer values

• Floating-point values

• The maximum size limit for a string value is 512MB

incr/decr commands¶

assume non-existent or empty string having a value of zero:

• incr key: increase the value of key by 1

• desc key: decrease the value of key by 1

• incrby key intval: increase the value of key by intval

• descby key intval: decrease the value of key by intval

• incrbyfloat key val: increase the value of key by val

substring commands¶

• append key val: concatenate value to string stored at the given key

• getrange key start end-incl: get substring from start to end inclusive

• setrange key offset val: append value to stored string ended before offset

• getbit key idx: get bit value at idx

• setbit key idx val: set bit value at idx

• bitcount key [start, end]: count the bits in the sub/string

• bitop op des-key key-name [key-name2 ...]: bitwise operations, AND, OR, XOR, or NOT, on provided strings, storing result in destination key