需求 ：进行商品搜索的时候，要从索引中进行搜索，由于后台要更新商品和插入商品，当时考虑到了怎么来插入新的索引和更新索引的问题，通过讨论，大家决定用Httpsqs这个消息中间来通知插入新索引和删除索引最后合并索引，来做到商品信息的实时更新。
下面我来讲一下Httpsqs的安装过程 ，以及在安装过程遇到的问题。
准备工作：
你需要准备一个虚拟机这里我们采用VMware7.1，
Linux采用CentOS5.4 可以到http://vault.centos.org/5.4/isos/i386/CentOS-5.4-i386-bin-DVD.torrent这个网址进行下载。
安装 httpsqs
在安装httpsqs之前要安装
libevent-2.0.12-stable.tar.gz和okyocabinet-1.4.47.tar.gz
ulimit -SHn 65535
1、安装libevent-2.0.12-stable.tar.gz
wget http://httpsqs.googlecode.com/files/libevent-2.0.12-stable.tar.gz##下载
tar zxvf libevent-2.0.12-stable.tar.gz##解压
cd libevent-2.0.12-stable/
./configure --prefix=/usr/local/libevent-2.0.12-stable/
make
make install
cd ../
安装tokyocabinet-1.4.47.tar.gz
wget http://httpsqs.googlecode.com/files/tokyocabinet-1.4.47.tar.gz
tar zxvf tokyocabinet-1.4.47.tar.gz
cd tokyocabinet-1.4.47/
./configure --prefix=/usr/local/tokyocabinet-1.4.47/
#注：在32位Linux操作系统上编译Tokyo cabinet，请使用./configure --enable-off64代替./configure，可以使数据库文件突破2GB的限制。
#./configure --enable-off64 --prefix=/usr/local/tokyocabinet-1.4.47/
make
make install
cd ../
当执行第二步骤的会出错，是由于缺少bzip2-1.0.6.tar.gz
下面进行安装
http://www.bzip.org/1.0.6/bzip2-1.0.6.tar.gz安装开始；
wget http://www.bzip.org/1.0.6/bzip2-1.0.6.tar.gz
tar -xvzf bzip2-1.0.6.tar.gz
cd bzip2-1.0.6.
make
make install
在重复安装tokyocabinet-1.4.47.tar.gz还是失败，由于缺少zlib-1.2.5.tar.gz
下面进行安装
http://www.winimage.com/zLibDll/zlib-1.2.5.tar.gz安装开始；
wget http://www.winimage.com/zLibDll/zlib-1.2.5.tar.gz
tar -xvzf zlib-1.2.5.tar.gz
cd zlib-1.2.5.
./configure
make
sudo make instal
继续第2步骤 OK
3、安装httpsqs-1.7.tar.gz
wget http://httpsqs.googlecode.com/files/httpsqs-1.7.tar.gz
tar zxvf httpsqs-1.7.tar.gz
cd httpsqs-1.7/
make
make install
cd ../
如果安装成功 执行httpsqs –h 会出现
--------------------------------------------------------------------------------------------------
HTTP Simple Queue Service - httpsqs v1.7 (April 14, 2011)
Author: Zhang Yan (http://blog.s135.com), E-mail: net@s135.com
This is free software, and you are welcome to modify and redistribute it under the New BSD License
-l <ip_addr> interface to listen on, default is 0.0.0.0
-p <num> TCP port number to listen on (default: 1218)
-x <path> database directory (example: /opt/httpsqs/data)
-t <second> keep-alive timeout for an http request (default: 60)
-s <second> the interval to sync updated contents to the disk (default: 5)
-c <num> the maximum number of non-leaf nodes to be cached (default: 1024)
-m <size> database memory cache size in MB (default: 100)
-i <file> save PID in <file> (default: /tmp/httpsqs.pid)
-a <auth> the auth password to access httpsqs (example: mypass123)
-d run as a daemon
-h print this help and exit
Use command "killall httpsqs", "pkill httpsqs" and "kill `cat /tmp/httpsqs.pid`" to stop httpsqs.
Please note that don't use the command "pkill -9 httpsqs" and "kill -9 PID of httpsqs"!
Please visit "http://code.google.com/p/httpsqs" for more help information.
但是没有 出现的是：
error while loading shared libraries: /usr/local/tokyocabinet-1.4.47/lib/libtokyocabinet.so.9: cannot restore segment prot after reloc: Permission denied
在google一下，说是没有建立它的软连接：
ln -s /usr/local/tokyocabinet-1.4.47/lib/libtokyocabinet.so.9 /usr/lib/libtokyocabinet.so.9
可是做了，还是报错 继续google，解决办法为：
vi /etc/sysconfig/selinux file
修改SELINUX=disabled
然后重启
再来一次
httpsqs -h
--------------------------------------------------------------------------------------------------
HTTP Simple Queue Service - httpsqs v1.7 (April 14, 2011)
Author: Zhang Yan (http://blog.s135.com), E-mail: net@s135.com
This is free software, and you are welcome to modify and redistribute it under the New BSD License
-l <ip_addr> interface to listen on, default is 0.0.0.0
-p <num> TCP port number to listen on (default: 1218)
-x <path> database directory (example: /opt/httpsqs/data)
-t <second> keep-alive timeout for an http request (default: 60)
-s <second> the interval to sync updated contents to the disk (default: 5)
-c <num> the maximum number of non-leaf nodes to be cached (default: 1024)
-m <size> database memory cache size in MB (default: 100)
-i <file> save PID in <file> (default: /tmp/httpsqs.pid)
-a <auth> the auth password to access httpsqs (example: mypass123)
-d run as a daemon
-h print this help and exit
Use command "killall httpsqs", "pkill httpsqs" and "kill `cat /tmp/httpsqs.pid`" to stop httpsqs.
Please note that don't use the command "pkill -9 httpsqs" and "kill -9 PID of httpsqs"!
Please visit "http://code.google.com/p/httpsqs" for more help information.
安装成功！！linux
——————————————————————————————————————————————————————————
http://blog.s135.com/httpsqs/
http://www.linuxidc.com/Linux/2011-08/39902.htm