Expert Oracle Exadata - Parent Directory

CHAPTER 14 STORAGE LAYOUTSummaryUnderstanding all the various layers of the Exadata storage architecture and how they fit together is akey component to properly laying out storage for databases. Understanding the relationship betweenphysical disks, LUNs, cell disks, grid disks, and ASM disk groups is absolutely necessary if you want tocarve up disk storage for maximum performance. In this chapter we’ve discussed what grid disks are,what they are made up of, and how they fit into the ASM storage grid. We’ve taken a look at how to createdisk groups so that IO is prioritized for performance critical datafiles. Carving up storage doesn’t end atthe disk, so we also discussed methods for partitioning storage by cell and by grid disk within the cell.495