ORACLE在HP-UX下的系列問題處理(18)
2024-08-29 13:39:46
供稿：網友
Oracle: 兩千年后將系統日期返回
問題描述
我是一個 Oracle 的開發者.我需要將我的系統升級到2000年.
當我任務完成以后將系統的日期返回會出現什么問題?
配置信息
操作系統 - HP-UX
版本 - 10.20
硬件系統 - HP9000
系列 -K100
application - Oracle
解決方法
任何的日期返回都會導致一系列的問題.
像這樣的日期返回已經被測驗并證實
這是不支持的方法.
下列是日期返回后已經發生或將要發生的問題的列表:
- 系統日期改變以后
你必須重新安裝操作系統.
注重: 你可以選擇性的利用 Inite 'reload'黃金版來重新導入你的系統.
- 你在向文件注冊日期時將會碰到問題
如:
utmp
wtmp
and BTmp.
- 你在 Logical Volume Manager (LVM)datestamp 域中將會碰到問題.
在普通系統運行時邏輯卷結構中的LVM datastamp 域已被寫到文件系統結構中。
- fsck 能夠證實任何在將來注冊日期的文件都將不可用。
并且，它會因此而從系統中被刪除掉。
注重: 這還沒有被證實.
- 時鐘的改變會影響到SCCS (Source Code Control System).
- Deltas 創建時將會包括錯誤的時鐘設置。
注重: 利用'val'命令核實 deltas.
- 備份要依靠文件的日期.
假如文件的日期與系統不同步，將會備份錯誤的版本.
- 假如你將系統的日期返回時鐘計時程序將不能運行任何的計劃任務直到時鐘達到日期返回以前的時間為止.
.........following with all English text ....Oracle: rolling system date back from beyond Y2KPRoblem Description
I am an Oracle developer. I need to advance my system date beyond Y2K.
What will happen when I roll the date back to the proper setting after
I complete my testing?
Configuration Info
Operating System - HP-UX
Version - 10.20
Hardware System - HP9000
Series - K100
Application - Oracle
Solution
Any date roll-back could cause serious problems. A date roll-back has not been tested or documented; therefore, it is not supported.
Listed below are problems that have already occurred, or problems that could occur when you roll back the system date:
- You must re-install the operating system after advancing the system date.
Note: You can optionally use an Ignite 'Reload' golden image to reload your system.
- You could have problems with login data written to files sUCh as utmp, wtmp, and btmp.
- You could eXPerience problems with the Logical Volume Manager (LVM) datestamp fields.
LVM datestamp fields in the logical volume structures are written into filesystem structures during normal system operation.
- fsck could decide that any files dated in the future are invalid,
and therefore should be deleted from the system.
Note: This has not been verified.
- A clock change affects SCCS (Source Code Control System).
- Deltas could be created with the incorrect clock setting.
Note: Use the 'val' command to verify the deltas.
- Incremental backups rely on file dates. If file dates are out of synchronization, the system may backup incorrect versions.
- If you roll back the system date, cron will not run any scheduled jobs until the clock reaches the date that the system had before the date roll-back.
