Expert Oracle Exadata - Parent Directory

CHAPTER 9 RECOVERING EXADATAThe imageinfo command displays everything we need to know about our Active and Inactive systemimages, including the partition device names, when the image was created (installed), when it wasactivated, and whether or not you can roll back to it (switch it to the Active image). Also notice that theinternal CELLBOOT USB flash drive we discussed earlier is listed (/dev/sdac1).> imageinfo -allKernel version: 2.6.18-194.3.1.0.3.el5 #1 SMP Tue Aug 31 22:41:13 EDT 2010 x86_64Cell version: OSS_11.2.0.3.0_LINUX.X64_101206.2Cell rpm version: cell-11.2.2.2.0_LINUX.X64_101206.2-1Active image version: 11.2.2.2.0.101206.2Active image created: 2010-12-07 05:55:51 -0800Active image activated: 2010-12-17 11:45:17 -0600Active image type: productionActive image status: successActive internal version:Active image label: OSS_11.2.0.3.0_LINUX.X64_101206.2Active node type: STORAGEActive system partition on device: /dev/md6Active software partition on device: /dev/md8In partition rollback: ImpossibleCell boot usb partition: /dev/sdac1Cell boot usb version: 11.2.2.2.0.101206.2Inactive image version: 11.2.2.1.1.101105Inactive image created: 2010-11-05 15:50:21 -0700Inactive image activated: 2010-11-18 14:48:49 -0600Inactive image type: productionInactive image status: successInactive internal version: 101105Inactive image label: OSS_11.2.2.1.1_LINUX.X64_101105Inactive node type: STORAGEInactive system partition on device: /dev/md5Inactive software partition on device: /dev/md7Boot area has rollback archive for the version: 11.2.2.1.1.101105Rollback to the inactive partitions: PossibleExadata storage cells are an elegant blend of Linux commands and proprietary programs. The morewe poke around through their scripts, processes, and documentation, the greater our appreciation of thearchitecture and what Oracle has done to build in software redundancy and recovery. The storage cellsmaintain a bootable cell recovery image on an internal USB flash disk as well as an online copy ofeverything Exadata needs to create an external bootable recovery image. This secondary copy of yourconfiguration provides a convenient way to restore individual files if needed. These are all in addition toExadata’s ability to roll back patches and upgrades conveniently. All these built-in features provideconvenient recovery from various user errors and protection from issues that can arise when patching orupgrading the storage cell.292