ms (meta set)

Protocols: memcached meta

Generic storage. The mode (M=S set, M=E add, M=A append, M=P prepend, M=R replace) selects which storage primitive runs.

Synopsis

ms <key> <bytes> [flags...]\r\n
<data>\r\n

Common flags

Flag	Effect
M(mode)	S set (default), E add, A append, P prepend, R replace
T(token)	TTL in seconds
F(token)	Client flags (32-bit)
C(token)	Compare-and-swap against token
c	Return CAS on success
k	Echo key
s	Return stored size
q	Quiet — suppress only the success line (HD); errors (NS/EX/NF) are still sent
I	Mark stale instead of storing
O(token)	Opaque correlator

Full table: Meta flags reference.

Responses

Token	Meaning
HD	Success
NS	Not stored (precondition failed, e.g. M=E on existing key)
NF	Not found (e.g. M=R on missing key)
EX	CAS mismatch (when C(token) is set)

Examples

> ms greeting 5\r\nhello\r\n
< HD
> ms greeting 1 M=E\r\nA\r\n
< NS
> ms greeting 1 C999\r\nB\r\n
< EX