Memcache View list all key methods and Memkeys Live View key Usage

Memcache View List all key methods

Today is doing a memcache session test, but in the process of testing, found memcache not a simpler way to directly like Redis like the keys * List all the session key, and according to the key get corresponding session content , so, I began to look up data, most of them turned out are some memcache commonly used commands, but the way to list key, but not much, so came to Google, found a foreign information


The specific content I apply to my test environment, operates as follows

1. CMD login memcache

> Telnet 127.0.0.1 11211

2. List all keys

Stats items//This one is an order.
STAT Items:7:number 1
STAT Items:7:age 188
End

3. Get key through Itemid

Next, based on the items ID listed, this example is 7, the 2nd parameter is the length listed, and 0 is all listed
Stats cachedump 7 0//This one is an order.
ITEM Sess_sidsvpc1473t1np08qnkvhf6j2 [183 B; 1394527347 S]
End

4. Get key value

The above stats cachedump command lists my session key and then uses the GET command to find the corresponding session value
Get SESS_SIDSVPC1473T1NP08QNKVHF6J2//This one is an order
VALUE
SESS_SIDSVPC1473T1NP08QNKVHF6J2 1440 1
83
Sess_|a:5:{s:6: "Verify"; s:32: "E70981FD305170C41A5632B2A24BBCAA"; s:3: "UID"; s:1: "1
S:8: "username"; s:5: "admin"; S:9: "Logintime"; s:19: "2014-03-11 16:24:25"; s:7: "Log
Inip "; S:9:" 127.0.0.1 ";}


Memkeys Real-time view of memcached key usage

Memkeys

Memkeys is a Tumblr open source similar to top tool that can be used to view memcached key usage in real time.

Memkeys Installation

Install autoconf (more than 2.68 version required):
# wget-c Http://ftp.gnu.org/gnu/autoconf/autoconf-latest.tar.gz
# tar ZXVF autoconf-latest.tar.gz
# CD autoconf-2.69
#./configure
# Make && make install

Install additional dependencies:
# yum Install libpcap-devel pcre-devel ncurses-devel

Install Memkeys:
# git clone https://github.com/tumblr/memkeys.git
# CD Memkeys
#./autogen.sh
#./configure
# Make && make install

Memkeys use

# memkeys-h
Usage:memkeys-i NIC [Options]
-D,--discard=thresh discard keys where req/s rate is below Thresh
-I,--interface=nic network interface to capture traffic on (required)
-p,--port=port network port to capture Memcache traffic on (default 11211)
-R,--refresh=interval refresh the stats display every INTERVAL MS (default 500)
-L,--logfile=file Output logs to FILE
-R,--report=report Output data in the format (CSV or curses, default curses)

-H,--help this Help
-V,--verbose increase verbosity. May is used multiple times.
-V,--version show program info and exit.

Example 1:

# memkeys-i Eth0-l/tmp/memkeys.log

Example 2:

# memkeys-i eth0-d 10.0-l/tmp/memkeys.log