Using export/import to migrate data from 8i to 9i

Question

We are trying to migrate all data from 8i database to 9i database. We plan to migrate the data using export/import utility so that we can have the current 8i database intact. And also the 8i and 9i database will reside on the same machine. Our 8i database size is around 300GB.
We plan to follow below steps :
Export data from 8i
Install 9i
Create tablespaces
Create schema and tables
create user (user used for exporting data)
Import data in 9i
Please let me know if below par file is correct for the export :
BUFFER=560000
COMPRESS=y
CONSISTENT=y
CONSTRAINTS=y
DIRECT=y
FEEDBACK=1000
FILE=dat1.dmp, dat2.dmp, dat3.dmp (more filenames here)
FILESIZE=2048GB
FULL=y
GRANTS=y
INDEXES=y
LOG=export.log
OBJECT_CONSISTENT=y
PARFILE=exp.par
ROWS=y
STATISTICS=ESTIMATE
TRIGGERS=y
TTS_FULL_CHECK=TRUE
Thanks,
Vinod Bhansali

Answer 1

I recommend you to change some parameters and remove
others:
BUFFER=560000
COMPRESS=y -- This will increase better storage
structure ( It is good )
CONSISTENT=y
CONSTRAINTS=y
DIRECT=n -- if you set that parameter in yes you
can have problems with some objects
FEEDBACK=1000
FILE=dat1.dmp, dat2.dmp, dat3.dmp (more filenames here)
FILESIZE=2048GB
FULL=y
GRANTS=y -- this value is the default ( It is
not necesary )
INDEXES=y
LOG=export.log
OBJECT_CONSISTENT=y -- ( start the database in restrict
mode and do not set this param )
PARFILE=exp.par
ROWS=y
STATISTICS=ESTIMATE -- this value is the default ( It is
not necesary )
TRIGGERS=y -- this value is the default ( It is
not necesary )
TTS_FULL_CHECK=TRUE
you can see what parameters are not needed if you apply
this command:
[oracle@ozawa oracle]$ exp help=y
Export: Release 9.2.0.1.0 - Production on Sun Dec 28 16:37:37 2003
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
You can let Export prompt you for parameters by entering the EXP
command followed by your username/password:
Example: EXP SCOTT/TIGER
Or, you can control how Export runs by entering the EXP command followed
by various arguments. To specify parameters, you use keywords:
Format: EXP KEYWORD=value or KEYWORD=(value1,value2,...,valueN)
Example: EXP SCOTT/TIGER GRANTS=Y TABLES=(EMP,DEPT,MGR)
or TABLES=(T1:P1,T1:P2), if T1 is partitioned table
USERID must be the first parameter on the command line.
Keyword Description (Default) Keyword Description (Default)
USERID username/password FULL export entire file (N)
BUFFER size of data buffer OWNER list of owner usernames
FILE output files (EXPDAT.DMP) TABLES list of table names
COMPRESS import into one extent (Y) RECORDLENGTH length of IO record
GRANTS export grants (Y) INCTYPE incremental export type
INDEXES export indexes (Y) RECORD track incr. export (Y)
DIRECT direct path (N) TRIGGERS export triggers (Y)
LOG log file of screen output STATISTICS analyze objects (ESTIMATE)
ROWS export data rows (Y) PARFILE parameter filename
CONSISTENT cross-table consistency(N) CONSTRAINTS export constraints (Y)
OBJECT_CONSISTENT transaction set to read only during object export (N)
FEEDBACK display progress every x rows (0)
FILESIZE maximum size of each dump file
FLASHBACK_SCN SCN used to set session snapshot back to
FLASHBACK_TIME time used to get the SCN closest to the specified time
QUERY select clause used to export a subset of a table
RESUMABLE suspend when a space related error is encountered(N)
RESUMABLE_NAME text string used to identify resumable statement
RESUMABLE_TIMEOUT wait time for RESUMABLE
TTS_FULL_CHECK perform full or partial dependency check for TTS
VOLSIZE number of bytes to write to each tape volume
TABLESPACES list of tablespaces to export
TRANSPORT_TABLESPACE export transportable tablespace metadata (N)
TEMPLATE template name which invokes iAS mode export
Export terminated successfully without warnings.
[oracle@ozawa oracle]$
Joel P�rez