Memcache 文件系统memcachefs 部署和使用 介绍 memcachefs是基于FUSE的memcached文件系统,将memcache服务挂载到本地。允许查看缓存中的数据,就好像是磁盘上的文件。memcache的操作都将转换成针对普通文件般的操作。 项目地址:http://memcachefs.sourcefor
Memcache文件系统memcachefs部署和使用
介绍
memcachefs是基于FUSE的memcached文件系统,将memcache服务挂载到本地。允许查看缓存中的数据,就好像是磁盘上的文件。memcache的操作都将转换成针对普通文件般的操作。
项目地址:http://memcachefs.sourceforge.net/
使用场景
基于本地磁盘缓存文件都可以用memcachefs来实现,效率上比磁盘更强大。。比如session文件等等。 如果先前的session信息就存在本地磁盘上,可以直接将memcache挂载到当前session目录上,无需更改程序,完美解决。
安装
1.安装依赖(使用root安装)
依赖
FUSE 2.5 or later
libmemcache 1.4 or later
a)安装fuse-2.9.3.tar.gz
cd /tmp wget http://hivelocity.dl.sourceforge.net/project/fuse/fuse-2.X/2.9.3/fuse-2.9.3.tar.gz tar zxvf fuse-2.9.3.tar.gz cd fuse-2.9.3 ./configure make make install
b)挂载fuse内核模块
modprobe fuse lsmod | grep "fuse"
c)安装libmemcache-1.4.0.rc2.tar.bz2
cd /tmp wget http://people.freebsd.org/~seanc/libmemcache/libmemcache-1.4.0.rc2.tar.bz2 tar xvf libmemcache-1.4.0.rc2.tar.bz2 cd libmemcache-1.4.0.rc2 ./configure make
编译出错,输出如下:
memcache.c: At top level: ../include/memcache/buffer.h:73: warning: inline function 'mcm_buf_remain_off' declared but never defined ../include/memcache/buffer.h:72: warning: inline function 'mcm_buf_remain' declared but never defined ../include/memcache/buffer.h:66: warning: inline function 'mcm_buf_len' declared but never defined ../include/memcache/buffer.h:73: warning: inline function 'mcm_buf_remain_off' declared but never defined ../include/memcache/buffer.h:72: warning: inline function 'mcm_buf_remain' declared but never defined ../include/memcache/buffer.h:66: warning: inline function 'mcm_buf_len' declared but never defined
解决方法,参考:
http://pietercvdmlinux.blogspot.com/2012_07_01_archive.html
wget 'http://svnweb.freebsd.org/ports/head/databases/libmemcache/files/patch-fix-inline?revision=248965&view=co' -O libcache.patch patch -p0 < libcache.patch
再次
make make install
2.下载安装memcachefs
mkdir /usr/local/memcachefs cd /tmp wget http://jaist.dl.sourceforge.net/project/memcachefs/memcachefs/0.5/memcachefs-0.5.tar.gz tar -zxvf memcachefs-0.5.tar.gz cd memcachefs-0.5 ./configure --prefix=/usr/local/memcachefs make make install cd /usr/local/memcachefs
3.挂载memcached
mkdir /usr/local/cache ./bin/memcachefs 192.168.11.52:11211 /usr/local/cache #将远程的memcache挂载到本地
报错如下:
“./bin/memcachefs: error while loading shared libraries: libmemcache.so.0: cannot open shared object file: No such file or directory”
解决方法:
将/usr/local/lib添加到/etc/ld.so.conf
echo "/usr/local/lib" >> /etc/ld.so.conf /sbin/ldconfig
查看挂载情况:
mount -l
memcachefs on /usr/local/cache type fuse.memcachefs (rw,nosuid,nodev)
使用
1.基本操作
cd /usr/local echo "helloworld" > cache/test_key #设置一个cache数据,文件名是键,文件内容是值。等同于set key value操作。 cat cache/test_key #获取cache数据。等同于get key操作。 ll cache/ #列出所有键。注意第五列不是指大小,而是表示字符长度。第六七列时间属性。 rm cache/test_key #删除cache数据,等同于delete key操作。 mv cache/username cache/username.bak #重命名
2.卸载
# mount #查看挂载 # umount /usr/local/cache #卸载 # fusermount -u /usr/local/cache #卸载
3.使用telnet客户端测试
set a 0 10 3 #10s过期。10s过后,cache目录下的a文件将被删除。
get username.bak #telnet方法获取memcachfs设置的cache数据
cat cache/a #通过memcachefs获取键a数据
[root@test01 local]# telnet 192.168.11.52 11211 Trying 192.168.11.52... Connected to 192.168.11.52. Escape character is '^]'. set a 0 10 3 aaa STORED get username.bak VALUE username.bak 0 6 ryanxu END quit Connection closed by foreign host. [root@test01 local]# cat cache/a aaa

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