更新时间:2022-09-05 12:27:56
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
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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
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b)挂载fuse内核模块
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modprobe fuse lsmod | grep "fuse"
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c)安装libmemcache-1.4.0.rc2.tar.bz2
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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:
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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
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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
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make make install
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2.下载安装memcachefs
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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
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3.挂载memcached
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mkdir /usr/local/cache
. /bin/memcachefs 192.168.11.52:11211 /usr/local/cache #将远程的memcache挂载到本地
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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
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echo "/usr/local/lib" >> /etc/ld .so.conf
/sbin/ldconfig |
查看挂载情况:
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mount -l
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memcachefs on /usr/local/cache type fuse.memcachefs (rw,nosuid,nodev)
使用
1.基本操作
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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
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2.卸载
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# 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
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[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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