安装purescale环境问题

我在centos 6.6 64位系统上，安装DB210.5purescale，运行./db2prereqcheck进行环境监测后，出现如下提示：

Validating "sg_persist" ... DBT3507E  The db2prereqcheck utility failed to find the following package or file: "sg_persist".
   ERROR : Requirement not matched.
   
Validating "/lib/libpam.so*" ...
   DBT3514W  The db2prereqcheck utility failed to find the following 32-bit library file: "/lib/libpam.so*".
   WARNING : Requirement not matched.
Requirement not matched for DB2 database "Server" with pureScale feature . Version: "9.8.0.2".
Summary of prerequisites that are not met on the current system:
   DBT3514W  The db2prereqcheck utility failed to find the following 32-bit library file: "/lib/libpam.so*".




DBT3507E  The db2prereqcheck utility failed to find the following package or file: "sg_persist".


用yum安装sg_persist，提示没有这个包，网上也无法下载，搜索了下发现 /usr/bin/下有这个文件sg_persist，不知道有没有什么关联。


请问大虾：  sg_persist是什么东西，要怎样才能安装上啊？  求大神帮忙解决。