RE: Rebuilding database to change block size

You will find the database create statement in the trace file (backup control file to trace)

You wanted to change some parameters so I think it would be good if can pre-create all the tablespaces and size them properly.

Everything else looks good.

Thx
Gautam

-----Original Message-----
From: Miller, Jay [mailto:JayMiller_at_TDWaterhouse.com] Sent: Tuesday, June 06, 2000 11:51 AM
To: Multiple recipients of list ORACLE-L Subject: Rebuilding database to change block size

Okay, we finally got enough storage space to hold an export of our datawarehouse so I'm going to change the block size from 4 to 16.

Obviously I'm testing this on a small play database first, but I've never done this before so I have several questions and would welcome any advice/comments/criticisms. Here's what I was thinking of:

1. Do a full export (consistent=y) as sys. Backup control file to trace
   (just as an extra precaution).
   
2. Shutdown database.
3. Cold backup of all files.
4. Drop all datafiles,control files, redo logs. Any other cleanup necessary? Or since the CREATE DATABASE command will erase data in existing datafiles, can I just skip this step entirely?
5. Change db_block_size in init.ora file
6. Start database in NOMOUNT mode.

Here's where I'm on somewhat thinner ice: 7. Issue create database command. Is there a way to generate this automatically from the existing database? It's easy enough to write from scratch but I'd rather not take chances with typos if I don't have to.

8. Change sys and system passwords.
9. I definitely want to precreate a few tablespaces where I want to change the initial extent parameter. Is it necessary to precreate all tablespaces and users (I can generate that script very easily)

1. Import database as sys.

Okay, what am I missing?

Thanks to all,
Jay

-- 
Author: Miller, Jay
  INET: JayMiller_at_TDWaterhouse.com

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
--------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L


(or the name of mailing list you want to be removed from).  You may

also send the HELP command for other information (like subscribing).