第五章：ODM

ODM管理的系统数据有：

设备配置信息；

SMIT显示信息；

安装和更新程序的关键产品数据

通信配置信息；

系统资源控制器信息；

错误日志和DUMP信息；

NIM信息。

ODM数据是二进制格式，不是文本格式。

ODMDIR指示默认的ODM库文件：When they execute, ODM commands use the value of the ODMDIR variable. Its default value is /etc/objrepos, but it can be changed.

 Predefined Devices (PdDv) ：包含AIX5L支持的所有设备的记录条目。主要记录属性有： type, class, subclass, prefix, base,detectable, led, setno, catalog, DvDr, Define, Configure, Change, Unconfigure, Undefine, Start, Stop, and uniquetype.

ODM包含LVM使用的所有数据的拷贝，如VGDA信息。

支持LINUX程序：Open source software in the Toolbox：:Toolbox are all in RPM format
http://www.ibm.com/servers/aix/products/aixos/linux/rpmgroups.html
NFS的MOUNT流程：

From the /usr/sbin/rpc.mountd daemon on the server
and the /usr/sbin/mount command on the client. The
mountd daemon is a Remote Procedure Call (RPC) that
answers a client request to mount a file system. The
mountd daemon provides a list of currently mounted file

Remote file access :

From the /usr/sbin/nfsd daemon on the server and the
/usr/sbin/biod daemon on the client. Handles client
requests for files. The biod daemon runs on all NFS client
systems. When a user on a client wants to read or write to
a file on a server, the biod daemon sends this request to
the server.
systems and the clients on which they are mounted.

新系统默认NFS服务未启动：需要手动启动：mknfs -N or startsrc -g nfs

Exporting NFS directories：smitty mknfsexp命令：修改 /etc/exports file.and # /usr/sbin/exportfs -a