While executing the "Client List" i get the below result,whats the meaning of the each flag
Slave
addr=100.0.0.0:0000 fd=5 idle=3 flags=S db=0 sub=0 psub=0 qbuf=0 obl=0 oll=0 events=r cmd=sync
Master
addr=100.0.0.0:0000 fd=6 idle=0 flags=N db=0 sub=0 psub=0 qbuf=0 obl=0 oll=0 events=r cmd=client
With client list, Redis prints one row per connected client.
From the redis.h and networking.c files of Redis source code:
- addr: address/port of the client
- fd: file descriptor corresponding to the socket
- idle: idle time of the connection in seconds
- flags: client flags (see below)
- db: current database ID
- sub: number of channel subscriptions
- psub: number of pattern matching subscriptions
- qbuf: query buffer length (0 means no query pending)
- obl: output buffer length
- oll: output list length (replies are queued in this list when the buffer is full)
- events: file descriptor events (see below)
- cmd: last command played
The client flags can be a combination of:
- O: the client is a slave in MONITOR mode
- S: the client is a normal slave server
- M: the client is a master
- x: the client is in a MULTI/EXEC context
- b: the client is waiting in a blocking operation
- i: the client is waiting for a VM I/O
- d: a watched keys has been modified - EXEC will fail
- c: connection to be closed after writing entire reply
- u: the client is unblocked
- N: no specific flag set
The file descriptor events can be:
- r: the client socket is readable (event loop)
- w: the client socket is writable (event loop)
It is my interpretation, please take it with a grain of salt.
