高可用memchache

安装yum -y install memcached
[root@localhost init.d]# cd /etc/rc.d/init.d
[root@localhost init.d]# ./memcached start
Starting memcached:                                        [  OK  ]
[root@localhost init.d]# ps aux

[root@localhost init.d]# telnet localhost 11211
[root@localhost init.d]# telnet localhost 11211
bash: telnet: command not found
[root@localhost init.d]# yum -y install telnet
Trying ::1...
Connected to localhost.
Escape character is '^]'.可用了
set zhang 0 10 3  #set <key> <是否丫说0：不压缩1：压缩> <expire 最多30天> <保存值得字节数>
bar
STORED
get zhang
VALUE zhang 0 3
bar
END
set counter 0 0 1
incr counter 1
set test 0 0 4
test#不然会报CLIENT_ERROR bad data chunk
STORED
append test 0 0 3
add
STORED
get test
VALUE test 0 7
testadd
END
flush_all   清楚所有的key value
OK
quit
Connection closed by foreign host.
[root@localhost init.d]#yum install ruby
[root@localhost init.d]# yum install rubygems
root@localhost init.d]# gem install memcache-client
root@localhost init.d]#ruby
在里面
$KCODE='u'

require "rubygems"
require "memcache"
server=['localhost:11211']
option={}
cache=MemCache.new(server,option)
cache['key1']=123
cache['key2']="ABCD"
cache['key3']=%w(hoge fuga)
cache['key4']={:foo=>1,:bar=>"a"}


p cache['key1']
p cache['key2']
p cache['key3']
p cache['key4']

按ctr-d
123
"ABCD"
["hoge", "fuga"]
{:foo=>1, :bar=>"a"}
[root@localhost init.d]# telnet localhost 11211
Trying ::1...
Connected to localhost.
Escape character is '^]'.
get key1
VALUE key1 0 5
i
{
END
get key2
VALUE key2 0 8
"    ABCD
END

[root@localhost init.d]# ruby
require "rubygems"
require "memcache"
cache=MemCache.new(['localhost:11211'])
cache.set('key','value',10)


p cache['key']

sleep 11

"value"
[root@localhost init.d]# memcached -d -p 11212 -u nobody -c 1024 -m 64
[root@localhost init.d]# memcached -d -p 11213 -u nobody -c 1024 -m 64
//分布式集群利用一致hash函数算法
[root@localhost init.d]# ruby
$KCODE='u'

require "rubygems"
require "memcache"
require "logger"

server=['localhost:11211','localhost:11212','localhost:11213']
option={
:logger=>Logger.new(STDOUT)
}
cache=MemCache.new(server,option)
cache['key1']=123
cache['key2']="ABCD"
cache['key3']=%w(hoge fuga)
cache['key4']={:foo=>1,:bar=>"a"}


p cache['key1']
p cache['key2']
p cache['key3']
p cache['key4']
I, [2015-12-27T03:41:14.096026 #26504]  INFO -- : memcache-client 1.8.5 ["localhost:11211", "localhost:11212", "localhost:11213"]
D, [2015-12-27T03:41:14.096202 #26504] DEBUG -- : Servers now: [<MemCache::Server: localhost:11211 [1] (NOT CONNECTED)>, <MemCache::Server: localhost:11212 [1] (NOT CONNECTED)>, <MemCache::Server: localhost:11213 [1] (NOT CONNECTED)>]
D, [2015-12-27T03:41:14.113930 #26504] DEBUG -- : set key1 to <MemCache::Server: localhost:11212 [1] (CONNECTED)>: 5
D, [2015-12-27T03:41:14.116295 #26504] DEBUG -- : set key2 to <MemCache::Server: localhost:11211 [1] (CONNECTED)>: 8
D, [2015-12-27T03:41:14.116596 #26504] DEBUG -- : set key3 to <MemCache::Server: localhost:11211 [1] (CONNECTED)>: 16
D, [2015-12-27T03:41:14.119752 #26504] DEBUG -- : set key4 to <MemCache::Server: localhost:11213 [1] (CONNECTED)>: 19
D, [2015-12-27T03:41:14.121405 #26504] DEBUG -- : get key1 from <MemCache::Server: localhost:11212 [1] (CONNECTED)>
123
D, [2015-12-27T03:41:14.121677 #26504] DEBUG -- : get key2 from <MemCache::Server: localhost:11211 [1] (CONNECTED)>
"ABCD"
D, [2015-12-27T03:41:14.121934 #26504] DEBUG -- : get key3 from <MemCache::Server: localhost:11211 [1] (CONNECTED)>
["hoge", "fuga"]
D, [2015-12-27T03:41:14.122167 #26504] DEBUG -- : get key4 from <MemCache::Server: localhost:11213 [1] (CONNECTED)>
模拟失去一个节点
[root@localhost init.d]# ruby
$KCODE='u'

require "rubygems"
require "memcache"
require "logger"

server=['localhost:11212','localhost:11213']
option={
:logger=>Logger.new(STDOUT)
}
cache=MemCache.new(server,option)
cache['key1']=123
cache['key2']="ABCD"
cache['key3']=%w(hoge fuga)
cache['key4']={:foo=>1,:bar=>"a"}


p cache['key1']
p cache['key2']
p cache['key3']
p cache['key4']
I, [2015-12-27T03:55:44.585193 #26589]  INFO -- : memcache-client 1.8.5 ["localhost:11212", "localhost:11213"]
D, [2015-12-27T03:55:44.585444 #26589] DEBUG -- : Servers now: [<MemCache::Server: localhost:11212 [1] (NOT CONNECTED)>, <MemCache::Server: localhost:11213 [1] (NOT CONNECTED)>]
D, [2015-12-27T03:55:44.607323 #26589] DEBUG -- : set key1 to <MemCache::Server: localhost:11212 [1] (CONNECTED)>: 5
D, [2015-12-27T03:55:44.607668 #26589] DEBUG -- : set key2 to <MemCache::Server: localhost:11212 [1] (CONNECTED)>: 8
D, [2015-12-27T03:55:44.607869 #26589] DEBUG -- : set key3 to <MemCache::Server: localhost:11212 [1] (CONNECTED)>: 16
D, [2015-12-27T03:55:44.609018 #26589] DEBUG -- : set key4 to <MemCache::Server: localhost:11213 [1] (CONNECTED)>: 19
D, [2015-12-27T03:55:44.609463 #26589] DEBUG -- : get key1 from <MemCache::Server: localhost:11212 [1] (CONNECTED)>
123
D, [2015-12-27T03:55:44.609726 #26589] DEBUG -- : get key2 from <MemCache::Server: localhost:11212 [1] (CONNECTED)>
"ABCD"
D, [2015-12-27T03:55:44.609963 #26589] DEBUG -- : get key3 from <MemCache::Server: localhost:11212 [1] (CONNECTED)>
["hoge", "fuga"]
D, [2015-12-27T03:55:44.610171 #26589] DEBUG -- : get key4 from <MemCache::Server: localhost:11213 [1] (CONNECTED)>
{:foo=>1, :bar=>"a"}

[root@localhost ~]# wget http://downloads.sourceforge.net/repcached/memcached-1.2.8-repcached-2.2.tar.gz

[root@localhost ~]# yum install libevent libevent-devel -y
[root@localhost ~]# tar zxvf memcached-1.2.8-repcached-2.2.tar.gz
[root@localhost ~]# cd memcached-1.2.8-repcached-2.2
[root@localhost memcached-1.2.8-repcached-2.2]#./configure --enable-replication --program-transform-name=s/memcached/repcached/
[root@localhost memcached-1.2.8-repcached-2.2]# make
[root@localhost memcached-1.2.8-repcached-2.2]# make install
 /usr/bin/install -c 'memcached' '/usr/local/bin/memcached'
  /usr/bin/install -c 'memcached-debug' '/usr/local/bin/memcached-debug'
make[2]: Nothing to be done for `install-data-am'.
make[2]: Leaving directory `/root/memcached-1.2.8-repcached-2.2'
make[1]: Leaving directory `/root/memcached-1.2.8-repcached-2.2'
[root@localhost memcached-1.2.8-repcached-2.2]# killall memcached

[root@localhost memcached-1.2.8-repcached-2.2]# killall memcached
[root@localhost memcached-1.2.8-repcached-2.2]# su paohaijiao非root
[paohaijiao@localhost memcached-1.2.8-repcached-2.2]$ /usr/local/bin/repcached -p 11211 -v -d
paohaijiao@localhost memcached-1.2.8-repcached-2.2]$ replication: listen
[paohaijiao@localhost root]$ pstree -G
init─┬─NetworkManager─┬─dhclient
     │                └─{NetworkManager}
     ├─abrtd
     ├─acpid
     ├─atd
     ├─auditd───{auditd}
     ├─bluetoothd
     ├─bonobo-activati───{bonobo-activat}
     ├─clock-applet
     ├─console-kit-dae───63*[{console-kit-da}]
     ├─crond
     ├─cupsd
     ├─2*[dbus-daemon───{dbus-daemon}]
     ├─2*[dbus-launch]
     ├─devkit-power-da
     ├─gconfd-2
     ├─gdm-binary─┬─gdm-simple-slav─┬─Xorg
     │            │                 ├─gdm-session-wor─+
     │            │                 │                 +
     │            │                 └─{gdm-simple-sla}
     │            └─{gdm-binary}
     ├─gdm-user-switch
     ├─gnome-keyring-d───2*[{gnome-keyring-}]
     ├─gnome-screensav
     ├─gnome-settings-───{gnome-settings}
     ├─gnome-terminal─┬─bash───su───bash───p+
     │                ├─gnome-pty-helpe
     │                └─{gnome-terminal}
     ├─gnote
     ├─gvfs-afc-volume───{gvfs-afc-volum}
     ├─gvfs-fuse-daemo───3*[{gvfs-fuse-daem}]
     ├─gvfs-gdu-volume
     ├─gvfs-gphoto2-vo
     ├─gvfsd
     ├─gvfsd-burn
     ├─gvfsd-trash
     ├─hald─┬─hald-runner─┬─hald-addon-acpi
     │      │             ├─hald-addon-inpu
     │      │             └─hald-addon-rfki
     │      └─{hald}
     ├─master─┬─pickup
     │        └─qmgr
     ├─5*[mingetty]
     ├─modem-manager
     ├─notification-ar
     ├─packagekitd
     ├─polkitd
     ├─pulseaudio─┬─gconf-helper
     │            └─2*[{pulseaudio}]
     ├─repcached(启动了这一个)
     ├─restorecond
     ├─rsyslogd───3*[{rsyslogd}]
     ├─rtkit-daemon───2*[{rtkit-daemon}]
     ├─seahorse-daemon
     ├─sshd
     ├─tpvmlp
     ├─trashapplet
     ├─udevd───2*[udevd]
     ├─udisks-daemon───udisks-daemon
     ├─2*[vmtoolsd]
     ├─vmware-vmblock-───2*[{vmware-vmblock}]
     ├─wnck-applet
     └─wpa_supplicant


[paohaijiao@localhost root]$ /usr/local/bin/repcached -p 11213 -x 127.0.0.1 -v -d
[paohaijiao@localhost root]$ replication: connect (peer=127.0.0.1:11212)
replication: marugoto copying
replication: start
[root@localhost ~]# pstree
init─┬─NetworkManager─┬─dhclient
     │                └─{NetworkManager}
     ├─abrtd
     ├─acpid
     ├─atd
     ├─auditd───{auditd}
     ├─bluetoothd
     ├─bonobo-activati───{bonobo-activat}
     ├─clock-applet
     ├─console-kit-dae───63*[{console-kit-da}]
     ├─crond
     ├─cupsd
     ├─2*[dbus-daemon───{dbus-daemon}]
     ├─2*[dbus-launch]
     ├─devkit-power-da
     ├─gconfd-2
     ├─gdm-binary─┬─gdm-simple-slav─┬─Xorg
     │            │                 ├─gdm-session-wor─┬─gnome-session─┬─bluetoo+
     │            │                 │                 │               ├─gdu-not+
     │            │                 │                 │               ├─gnome-p+
     │            │                 │                 │               ├─gnome-p+
     │            │                 │                 │               ├─gnome-v+
     │            │                 │                 │               ├─gpk-upd+
     │            │                 │                 │               ├─metacit+
     │            │                 │                 │               ├─nautilus
     │            │                 │                 │               ├─nm-appl+
     │            │                 │                 │               ├─polkit-+
     │            │                 │                 │               ├─python
     │            │                 │                 │               └─{gnome-+
     │            │                 │                 └─{gdm-session-wo}
     │            │                 └─{gdm-simple-sla}
     │            └─{gdm-binary}
     ├─gdm-user-switch
     ├─gnome-keyring-d───2*[{gnome-keyring-}]
     ├─gnome-screensav
     ├─gnome-settings-───{gnome-settings}
     ├─gnome-terminal─┬─bash───su───bash───su───bash───su───bash───su───bash───+
     │                ├─bash───su───bash
     │                ├─bash───pstree
     │                ├─gnome-pty-helpe
     │                └─{gnome-terminal}
     ├─gnote
     ├─gvfs-afc-volume───{gvfs-afc-volum}
     ├─gvfs-fuse-daemo───3*[{gvfs-fuse-daem}]
     ├─gvfs-gdu-volume
     ├─gvfs-gphoto2-vo
     ├─gvfsd
     ├─gvfsd-burn
     ├─gvfsd-trash
     ├─hald─┬─hald-runner─┬─hald-addon-acpi
     │      │             ├─hald-addon-inpu
     │      │             └─hald-addon-rfki
     │      └─{hald}
     ├─master─┬─pickup
     │        └─qmgr
     ├─5*[mingetty]
     ├─modem-manager
     ├─notification-ar
     ├─polkitd
     ├─pulseaudio─┬─gconf-helper
     │            └─2*[{pulseaudio}]
     ├─2*[repcached]11213+11211
     ├─restorecond
     ├─rsyslogd───3*[{rsyslogd}]
     ├─rtkit-daemon───2*[{rtkit-daemon}]
     ├─seahorse-daemon
     ├─sshd
     ├─tpvmlp
     ├─trashapplet
     ├─udevd───2*[udevd]
     ├─udisks-daemon───udisks-daemon
     ├─2*[vmtoolsd]
     ├─vmware-vmblock-───2*[{vmware-vmblock}]
     ├─wnck-applet
     └─wpa_supplicant
     [root@localhost ~]# telnet localhost 11211
Trying ::1...
Connected to localhost.
Escape character is '^]'.
set ab 0 0 3
foo
STORED
get ab
VALUE ab 0 3
foo

[root@localhost ~]# telnet localhost 11213
Trying ::1...
Connected to localhost.
Escape character is '^]'.
get ab
VALUE ab 0 3
foo
set x 0 0 3
xyz
STORED
get x
VALUE x 0 3
xyz
END
quit
Connection closed by foreign host.
[root@localhost ~]# telnet localhost 11211
Trying ::1...
Connected to localhost.
Escape character is '^]'.
get x
VALUE x 0 3
xyz
END
这说明他是双向的