RE: Does NT write to random locations on disk?

Well then forget the compress issue. I can shutdown the database, move the db files to another directory, do the usual dba excercises to let Oracle know the new location, and startup with no problems. (Oracle 7.3 on Netware3)

The reason I remember is that when we upgraded from 7.0 to 7.3, the documentation about placement of db files was incredibly sucky. Naturally, I researched it throughly (various TARs, complaints, etc.), and it turns out it was much simpler than the docs made it sound.

Anyways, I'll submit an iTar since I need to know this stuff when we migrate to NT/Win2k in the near future.

regards,
ep

On 9 Mar 2001, at 13:55, Smith, Ron L. wrote:

Date sent:              Fri, 09 Mar 2001 13:55:35 -0800
Send reply to:          ORACLE-L_at_fatcity.com

> Oracle datafiles are formatted into blocks. Data is read either physically
> by block or an indexed block number. If you compress using zip and then
> uncompress, the blocks have not changed. If you reorg the file the blocks
> will probably change and the data wont be where Oracle thinks it is.
>
> I wouldn't do it.
>
>
>
> -----Original Message-----
> Sent: Friday, March 09, 2001 2:31 PM
> To: Multiple recipients of list ORACLE-L
>
>
> Are you talking about a shutdown database, or one started?
>
> (After shutdown) why can I ".zip" the database files on
> Netware3, move them around (copy to DAT, CD, backup directories,
> etc., then restore them (potentially in another location),
> and successfully run the database after?
>
> As far as I recall, the db files work "independent" of the
> low level allocation details of the OS I/O system.
>
> I would guess running defrag while db is started is a bad
> idea, but if db is shutdown, should be no problem. I'll
> (try to) log an iTAR through the NT CSI I have if it is of
> sufficient interest.
>
> regards,
> ep
>
> On 9 Mar 2001, at 11:35, Smith, Ron L. wrote:
>
> Date sent: Fri, 09 Mar 2001 11:35:38 -0800
> To: Multiple recipients of list ORACLE-L
> <ORACLE-L_at_fatcity.com>
>
> > I wouldn't think you would want to reorg an Oracle tablespace with an NT
> > defrag utility. You would corrupt the data.
>
> ...

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