onbar就是备份,在onconfig文件里面把tapedev 设成你的磁带设备。还有ltapedev也设成你的磁带设备。然后把onconfig中的onbar相关项目配置好。重起Informix Server，你的逻辑日志就会自动备份到你的磁带设备上了。然后， 你需要备份onbar -b -w， 需要恢复obar -r -p 或者 －l，还有一个很好的功能，onbar -t 时间，可以恢复到任意时间点。
如果要使用onbar,必须要有存储管理器,这一般是其它厂商的产品,informix和这些厂商都遵守XBSA协议,也就是相应的API接口.否则,只能使用ontape备份了.
另外,informix自己也带了一个简单的存储管理器,你可以参考
Informix Backup and Restore Guide, December 1999这本手册.
/usr/informix/bin/onbar
BACKUP:
=======
-b [-L ] [-f ] []
-b -w [-L ]
-b -F
-l [-c] [-s]
-b backup
-c backup current logical log
-f pathname of file containing list of dbspaces, blobspaces
-F fake backup
-l backup full logical logs
-L backup level: 0, 1, or 2
-w whole system backup
-s salvage logs
list of dbspaces, blobspaces to backup
RESTORE
========
-r [-e] [-t | -n ] [-f ] []
-r [-e] -p [-t ] [-f ] []
-r -l [-t | -n ] [-f ] []
-r [-e] -w [-p] [-t | -n ]
-RESTART
-e external restore
-f pathname of file containing list of dbspaces, blobspaces
-l logical restore
-n last logical log to restore
-p physical restore
-r restore
-t point in time to stop restore.
list of dbspaces, blobspaces to restore
-w whole system to restore
-RESTART restart an interrupted restore
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