Expert Oracle Exadata - Parent Directory

CHAPTER 9 RECOVERING EXADATAconfiguration remains in the system for 7 days, after which it is automaticallypurged.griddisk-detail: This file contains a detailed report of all grid disks configuredon the storage cell. It is created using the CellCLI command LIST GRIDDISKDETAIL and includes, among other things, the grid disk name, cell disk name,size, and status of all grid disks you have configured on the storage cell.flashcache-detail: This report contains the list of all FMODs that make up thecell flash cache. It is the output of the CellCLI command LIST FLASHCACHEDETAIL and includes the size and status of the flash cache. Also found in thisreport is a list of all flash cache cell disks that are operating in a degraded mode.alerthistory: The alerthistory file contains a detailed report of all alerts thathave occurred on the storage cell. It is created using the CellCLI command LISTALERTHISTORY.fdom-l: This report contains detailed information about the four flash cachecards and flash cache modules (FDOMs) on your storage cell. It is created byrunning the /usr/bin/flash_dom –l command on the storage cell and includesinformation like firmware version, address, and device name of each of theFDOMs. For example:D# B___T Type Vendor Product Rev Operating System Device Name1. 0 0 Disk ATA MARVELL SD88SA02 D20Y /dev/sdu [3:0:0:0]2. 0 1 Disk ATA MARVELL SD88SA02 D20Y /dev/sdv [3:0:1:0]3. 0 2 Disk ATA MARVELL SD88SA02 D20Y /dev/sdw [3:0:2:0]4. 0 3 Disk ATA MARVELL SD88SA02 D20Y /dev/sdx [3:0:3:0]alert.log: The alert.log file is written to by the cellsrv process. Similar to adatabase or ASM alert log file, the storage cell alert.log contains importantruntime information about the storage cell and the status of its disk drives. Thisfile is very useful in diagnosing problems with cell storage.ms-odl.trc: The ms-odl.trc contains detailed runtime, trace-level informationfrom the cell’s management server process.ms-odl.log: This file is written to by the cell’s management server process. It isnot included in the collection created by the sundiag.sh script, but we havefound it very useful in diagnosing problems that occur in the storage cell. It alsocontains normal, day-to-day operational messages. Storage cells maintain theirlog files by rotating them, similar to the way the operating system rotates thesystem log (/var/log/messages). The ms-odl.log file records these tasks as wellas more critical tasks like disk failures.HealthCheckHealthCheck is a set of shell scripts developed by Oracle that you can use to verify your configuration.These scripts are not included in your Exadata installation but are readily available for download fromMy Oracle Support under Article ID: 1070954.1, “Oracle Database Machine HealthCheck.” The scriptsare well documented and produce a staggering amount of information about your Exadata DatabaseMachine, so we won’t go through all the gory details here. HealthCheck reports the currentconfiguration of key hardware and software components of Exadata. Oracle recommends that youroutinely run HealthCheck as a normal part of maintaining your database machine. The output should278