又一次发现Oracle太美之oraInst.loc
平台操作系统版本号神马的，聪明人一看就知道了。我就不多码字了！
oracle@rh64 oraInventory]$ opatch lsinv
Oracle Interim Patch Installer version 11.2.0.3.6
Copyright (c) 2013, Oracle Corporation. All rights reserved.
Oracle Home : /u01/app/db11g/product/11.2.0/dbhome_1
Central Inventory : /u01/app/oraInventory =====>>>能够看到这是个Central Inventory
from : /u01/app/db11g/product/11.2.0/dbhome_1/oraInst.loc =====>>>能够看到这是个Oracle Home Inventory
OPatch version : 11.2.0.3.6
OUI version : 11.2.0.4.0
Log file location : /u01/app/db11g/product/11.2.0/dbhome_1/cfgtoollogs/opatch/opatch2014-05-15_00-33-12AM_1.log
Lsinventory Output file location : /u01/app/db11g/product/11.2.0/dbhome_1/cfgtoollogs/opatch/lsinv/lsinventory2014-05-15_00-33-12AM.txt
--------------------------------------------------------------------------------
Installed Top-level Products (1):
Oracle Database 11g 11.2.0.4.0
There are 1 product(s) installed in this Oracle Home.
Interim patches (1) :
Patch 18031668 : applied on Wed May 14 03:28:24 CST 2014
Unique Patch ID: 17255543
Patch description: "Database Patch Set Update : 11.2.0.4.2 (18031668)"
Created on 20 Feb 2014, 05:15:58 hrs PST8PDT
Sub-patch 17478514; "Database Patch Set Update : 11.2.0.4.1 (17478514)"
Bugs fixed:
17288409, 16399083, 17205719, 17811429, 10136473, 16472716, 17614227
17050888, 17040764, 17865671, 17325413, 14010183, 17726838, 13364795
17389192, 17612828, 17080436, 16613964, 17284817, 17441661, 17761775
17721717, 16721594, 17390431, 18203837, 17551709, 17344412, 16043574
17446237, 16863422, 18139690, 17071721, 17501491, 17610798, 17239687
17752121, 17468141, 17602269, 18203835, 17375354, 17313525, 17811456
16731148, 14133975, 18203838, 16956380, 17385178, 17235750, 13866822
17394950, 17478514, 17027426, 12905058, 14338435, 16450169, 13944971
18094246, 16929165, 16785708, 17265217, 17465741, 16220077, 16180763
16069901, 17546973, 16285691, 17323222, 18180390, 17088068, 16875449
17016369, 17443671, 16228604, 17811438, 17811447, 16837842, 18031668
16912439, 17332800, 17393683, 17622427, 17545847, 17186905, 16943711
16850630, 17082359, 17346671, 14852021, 17783588, 17437634, 16618694
17341326, 17296856, 17546761, 17716305
--------------------------------------------------------------------------------
OPatch succeeded.
============>>>补丁已经打到了11.2.0.4.2,以下是oraInst.loc中的内容：
1.Central Inventory中的oraInst.loc
[oracle@rh64 oraInventory]$ cat /u01/app/oraInventory/oraInst.loc
inventory_loc=/u01/app/oraInventory
inst_group=oinstall
2. ORACLE_HOME下的oraInst.loc
[oracle@rh64 oraInventory]$ echo $ORACLE_HOME
/u01/app/db11g/product/11.2.0/dbhome_1
[oracle@rh64 oraInventory]$ cat /u01/app/db11g/product/11.2.0/dbhome_1/oraInst.loc
inventory_loc=/u01/app/oraInventory
inst_group=oinstall
3. /etc以下的oraInst.loc =====>>>Central Inventory Pointer File
[oracle@rh64 oraInventory]$ cat /etc/oraInst.loc
inventory_loc=/u01/app/oraInventory
inst_group=oinstall
注意：可见上面三个文件都是一样的内容。都是第一行注冊文件夹的位置，第二行为宿主。
注意假设你通过新装软件的方式来升级数据库，假设ORACLE的基
文件夹有所改变，要记得同一时候改动这三个文件。以免使用OPatch的时候报错。
在oracle官方文档的Oracle® Universal Installer and OPatch User's Guide 11g Release 2 (11.2) for Windows and UNIX有具体描写叙述.
Oracle Universal Installer Inventory的注冊文件夹有例如以下三个：
1> Central Inventory Pointer File
2> Central Inventory
3> Oracle Home Inventory
1> Central Inventory Pointer File
每个oracle软件安装都会有它自己的Central Inventory pointer file
Table 2-2 Default Inventory Pointer File Locations
Platform Default Inventory Pointer Location
Linux Linux.PPC64 AIX /etc/oraInst.loc
Solaris.SPARC Solaris.X64 HPUX HPIA HP.TRU64 Linux.IA64 Linux.xSeries /var/opt/oracle/oraInst.loc
Windows Windows.X64 Windows.IA64 HKEY_LOCAL_MACHINE/Software/Oracle/inst.loc
In UNIX, if you do not want to use the Central Inventory located in the directory specified by the inventory pointer file, you can use the -invPtrLoc flag to specify another inventory pointer file. The syntax is as follows:
./runInstaller -silent -invPtrLoc <Location_of_oraInst.loc> ORACLE_
HOME="<Location_of_Oracle_Home>"
2> Central Inventory
Central Inventory包括了在一个主机上安装的全部Oracle软件产品的信息。
这个以下包含Inventory File，Logs Directory
Oracle强烈建议不要手工改动这以下的inventory.xml。否则会造成产品安装或者patch的时候出现故障。
3> Oracle Home Inventory
包含Components File,Home Properties File,Other Folders
怎样创建Central Inventory？（见官档）
./runInstaller -silent -attachHome ORACLE_HOME="<Oracle_Home_Location>"
"CLUSTER_NODES={<node1,node2>}" LOCAL_NODE="<node_name>"
怎样创建Removing the Central Inventory？（见官档）
总结：
这个东西我如今感觉就是在安装或者打补丁的时候，还有clone软件的时候，从别的地方tar过来软件的时候，这三个文件须要注意。
另外意外丢失怎样重建也可能会遇到。当然另一些其它的日志信息可供參考的，没啥难得。看看就好
