Expert Oracle Exadata - Parent Directory

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CHAPTER 14 STORAGE LAYOUTGrid DisksGrid disks are created within cell disks, which you may recall are made up of physical disks and FlashCache modules. In a simple configuration one grid disk can be created per cell disk. More complexconfigurations have multiple grid disks per cell disk. The CellCLI command, list griddisk displays thevarious characteristics of grid disks. For example, the following output shows the relationship betweengrid disks and cell disks, the type of device on which they are created, and their size.[enkcel03:root] root> cellcliCellCLI: Release 11.2.1.3.1 - Production on Sat Oct 23 17:23:32 CDT 2010Copyright (c) 2007, 2009, Oracle. All rights reserved.Cell Efficiency Ratio: 20MCellCLI> list griddisk attributes name, celldisk, disktype, sizeDATA_CD_00_cell03 CD_00_cell03 HardDisk 1282.8125GDATA_CD_01_cell03 CD_01_cell03 HardDisk 1282.8125G…FLASH_FD_00_cell03 FD_00_cell03 FlashDisk 4.078125GFLASH_FD_01_cell03 FD_01_cell03 FlashDisk 4.078125G…ASM doesn’t know anything about physical disks or cell disks. Grid disks are what the storage cellpresents to the database servers (as ASM disks) to be used for Clusterware and database storage. ASMuses grid disks to create disk groups in the same way conventional block devices are used on a non-Exadata platform. To illustrate this, the following query shows what ASM disks look like on a non-Exadata system.SYS:+ASM1> select path, total_mb, failgroupfrom v$asm_diskorder by failgroup, group_number, path;PATHTOTAL_MB FAILGROUP--------------- ---------- ------------------------------/dev/sdd111444 DATA01/dev/sde111444 DATA02…/dev/sdj13816 RECO01/dev/sdk13816 RECO02…The same query on Exadata reports grid disks that have been created at the storage cell.SYS:+ASM1> select path, total_mb, failgroupfrom v$asm_diskorder by failgroup, group_number, path;PATHTOTAL_MB FAILGROUP---------------------------------------- ----------- ------------------------o/192.168.12.3/DATA_CD_00_cell011313600 CELL01o/192.168.12.3/DATA_CD_01_cell011313600 CELL01o/192.168.12.3/DATA_CD_02_cell011313600 CELL01471
CHAPTER 14 STORAGE LAYOUT…o/192.168.12.3/RECO_CD_00_cell01o/192.168.12.3/RECO_CD_01_cell01o/192.168.12.3/RECO_CD_02_cell01…o/192.168.12.4/DATA_CD_00_cell02o/192.168.12.4/DATA_CD_01_cell02o/192.168.12.4/DATA_CD_02_cell02…o/192.168.12.4/RECO_CD_00_cell02o/192.168.12.4/RECO_CD_01_cell02o/192.168.12.4/RECO_CD_02_cell02…o/192.168.12.5/DATA_CD_00_cell03o/192.168.12.5/DATA_CD_01_cell03o/192.168.12.5/DATA_CD_02_cell03…o/192.168.12.5/RECO_CD_00_cell03o/192.168.12.5/RECO_CD_01_cell03o/192.168.12.5/RECO_CD_02_cell03…93456 CELL0193456 CELL01123264 CELL011313600 CELL021313600 CELL021313600 CELL0293456 CELL0293456 CELL02123264 CELL021313600 CELL031313600 CELL031313600 CELL0393456 CELL0393456 CELL03123264 CELL03Tying it all together, Figure 14-4 shows how the layers of storage fit together, from the storage cell tothe ASM disk group. Note, that the Linux O/S partitions on the first two cell disks in each storage cell areidentified by a dotted line. We’ll talk a little more about the O/S partitions later in the chapter, and inmuch more detail in Chapter 8.472
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For your convenience Apress has pla
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IntroductionThank you for purchasin
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INTRODUCTIONwere implementing Exada
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CHAPTER 1 WHAT IS EXADATA?end of t
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CHAPTER 1 WHAT IS EXADATA? Kevin S
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CHAPTER 1 WHAT IS EXADATA?Limited
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CHAPTER 1 WHAT IS EXADATA?Software
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C H A P T E R 2Offloading / Smart S
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CHAPTER 2 OFFLOADING / SMART SCANR
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CHAPTER 2 OFFLOADING / SMART SCANS
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C H A P T E R 3Hybrid Columnar Comp
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CHAPTER 3 HYBRID COLUMNAR COMPRESS
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C H A P T E R 4Storage IndexesStora
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CHAPTER 4 STORAGE INDEXESMonitorin
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CHAPTER 4 STORAGE INDEXESVersion:
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CHAPTER 4 STORAGE INDEXES• For e
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CHAPTER 4 STORAGE INDEXESSYS@EXDB1
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CHAPTER 4 STORAGE INDEXESpositives
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CHAPTER 4 STORAGE INDEXESIncorrect
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CHAPTER 4 STORAGE INDEXES---------
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CHAPTER 4 STORAGE INDEXES1 row sel
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C H A P T E R 5Exadata Smart Flash
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CHAPTER 5 EXADATA SMART FLASH CACH
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C H A P T E R 6Exadata Parallel Ope
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CHAPTER 6 MAKING PCBSParameter Def
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CHAPTER 6 MAKING PCBSTable 6-2. Hi
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CHAPTER 6 MAKING PCBSSo as you can
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CHAPTER 6 MAKING PCBS-- switch to
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CHAPTER 6 MAKING PCBSSYS@EXDB1> /S
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CHAPTER 6 MAKING PCBSControlDescri
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CHAPTER 6 MAKING PCBSEnter value f
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CHAPTER 7 RESOURCE MANAGEMENTimpor
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CHAPTER 7 RESOURCE MANAGEMENTSQL>
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C H A P T E R 8Configuring ExadataO
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CHAPTER 9 RECOVERING EXADATAprovid
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CHAPTER 10 EXADATA WAIT EVENTSSYS@
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CHAPTER 10 EXADATA WAIT EVENTScell
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C H A P T E R 11Understanding Exada
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CHAPTER 11 UNDERSTANDING EXADATA P
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CHAPTER 12 MONITORING EXADATA PERF
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Page 470 and 471: C H A P T E R 14Storage LayoutIn Or
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CHAPTER 16 UNLEARNING SOME THINGS
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A P P E N D I X ACellCLI and dcliCe
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APPENDIX A CELLCLI AND DCLILIST FL
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APPENDIX A CELLCLI AND DCLICellCLI
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APPENDIX A CELLCLI AND DCLI• Dis
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A P P E N D I X BOnline Exadata Res
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A P P E N D I X CDiagnostic Scripts
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APPENDIX C DIAGNOSTIC SCRIPTSScrip
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Index• AAccess control list (ACL)
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• INDEXnetwork componentsclient a
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• INDEX• Epredicate offload, 36
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• INDEXOTHER_GROUPS consumer grou
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• INDEXCPU utilization, 152mixed
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• INDEXstructure, 105sub-query, 1
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Expert Oracle Exadatan n nKerry Osb
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Contents• About the Authors......
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• CONTENTSHow to Verify That Smar
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• CONTENTSControlling ESFC Usage
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• CONTENTSSummary ...............
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• CONTENTS• Chapter 12: Monitor
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• CONTENTS• Chapter 16: Unlearn
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About the Technical Reviewer Kevin
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