Mladen Gogala
Very interesting your indication.
This verification is very easy to apply and also guarantee that the last
line of the source table was migrated to the new instance.
I will consider this.
Thanks Mladen Gogala for your answer.
Regards
Eriovaldo
Em dom., 14 de abr. de 2024 às 11:16, Mladen Gogala <gogala.mladen@xxxxxxxxx>
escreveu:
On Sun, 2024-04-14 at 09:29 -0400, Mark W. Farnham wrote:
A fairly standard minimum is the number of rows in each user table and the
sum of the values of numeric columns in each table. The CDP exam circa 1982
called these “control totals.”
A more aggressive verification is to also pipe the text fields through a
hasher and compare the hash values.
A reverse migration of all the data back to the original machine (even one
user table at a time if space is a problem) with a full row by row, column
by column comparison is comprehensive, but the cost versus the benefit does
need to be considered. (This can also be done between OCI and the existing
machine, but usually the network latency doing things row by row makes a
back load of the data more performant.)
Good luck,
mwf
PS: I presume your OCI means Oracle Cloud Infrastructure, not Oracle Call
Interface
*From:* oracle-l-bounce@xxxxxxxxxxxxx [mailto:
oracle-l-bounce@xxxxxxxxxxxxx] *On Behalf Of *Eriovaldo Andrietta
*Sent:* Sunday, April 14, 2024 8:28 AM
*To:* ORACLE-L
*Subject:* Migration validation to OCI
Hello,
An exadata database server onpremise will be migrated to OCI As Is to the
same Oracle version (12.x).
I would like to know what else would have to be validated at OCI to ensure
that the migration was successful.
I thought I would check:
- dba_users
- dba_objects (and each object type separately)
- dba_tab_privs
- dba_sys_privs
- dba_roles
- dba_synonym
- dba_extents (in order to check the volumn)
- count the number of lines for each table, or to check at the dba_tables
numrows if the statistics are updated.
I guess that the number of lines migrated are enough to accept to
content of the table
The goal is to check only in the context of objects and not configuration
(v$parameters, tablespaces, resource manager and other structures).
What else could be validated?
Regards
Eriovaldo
Another verification method that I remember using since before there was
Oracle Cloud Infrastructure is verifying maximum dates in the transaction
tables. Pretty much every application has columns like VALID_DATE,
PAYMENT_DATE, RECEIVED_DATE or something similar. Those fields are usually
indexed so computing the maximum isn't very expensive. Will migration be
done using export/import (data pump version)? If yes, sequence values will
need to be adjusted, too.
--
Mladen Gogala
Database SME
https://dbwhisperer.wordpress.com