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Oracle Tips by Burleson |
Oracle10g Grid Computing
with RAC
Chapter 17 -
Oracle’s Grid Integration Technologies
Data Pump
Export
ESTIMATE –
This specifies whether or not export should estimate how much disk
space the export job consumes in bytes. The estimated size is
displayed in the log file and on the client’s output screen. The
estimate is only for table row data; it does not include metadata.
Valid values
for this parameter are:
-
BLOCKS – The
estimate is calculated by multiplying the number of database blocks
used by the target objects by the appropriate block size. This is the
default value.
-
SAMPLING
–
The estimate is calculated by sampling a fixed number of rows per
table.
-
STATISTICS –
The estimate is calculated by using each table’s statistics from the
most recent analysis.
-
When
estimate_only=y, the
export estimates the space that would be consumed, but no data is
actually exported. The default value is N. Here is an example of an
export using estimate_only=y:
$ expdp
oracle/passwd estimate_only=y
Export:
Release 10.1.0.0.0 - 64bit Beta on Sun Sep 21 18:00:59 2003
(c)
Copyright 2002 Oracle Corporation. All rights reserved.
Connected
to: Oracle10i Enterprise Edition Release 10.1.0.0.0 - 64bit Beta
With the
Partitioning, OLAP and Oracle Data Mining options
Starting
"ORACLE"."SYS_ESTIMATE_SCHEMA_01": estimate_only=y
Estimate in
progress using BLOCKS method...
Processing
object type SCHEMA_EXPORT/TABLE/TABLE_DATA
. estimated
"ORACLE"."PLAN_TABLE" 64 KB
. estimated
"ORACLE"."TEST" 64 KB
Total
estimation using BLOCKS method: 128 KB
Job
"ORACLE"."SYS_ESTIMATE_SCHEMA_01" successfully completed
exclude –
This allows fine-grained specification of objects and object types
that are to be excluded from the export operation (default value is
NONE). The excludeand include parameters
are mutually exclusive.
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