IBM 000-8697 Manual do Utilizador descarregar pdf (Página 373)

4

Chapter

Data Consistency, Recovery,

and Migration

In This Chapter .................... 4-5

Consistency Checking.................. 4-6

Using the tbcheck Commands.............. 4-6

tbcheck -cr ................... 4-7

tbcheck -cc ................... 4-7

tbcheck -ce ................... 4-7

tbcheck -cI ................... 4-8

tbcheck -cD................... 4-8

Using the OnLine Message Log ............. 4-8

Setting Consistency-Checking Variables .......... 4-9

GCORE .................... 4-10

DUMPCORE .................. 4-11

DUMPSHMEM ................. 4-11

DUMPDIR ................... 4-12

Recovering from Corruption .............. 4-12

Mirroring ...................... 4-14

Beginning..................... 4-15

Processing .................... 4-16

Recovery ..................... 4-17

Ending...................... 4-17

OnLine Logging Overview ................ 4-18

Dbspace Logging .................. 4-19

Blobspace Logging ................. 4-22

Operations Logging ................ 4-24

Operations Rollback................ 4-24

Blob Restoration ................. 4-25

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