| Oracle FAQ | Your Portal to the Oracle Knowledge Grid | |
 |
 | |||
| Oracle FAQ | Your Portal to the Oracle Knowledge Grid | |
|
| |||
Home -> Community -> Mailing Lists -> Oracle-L -> RE: Does NT write to random locations on disk?
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.
...
-- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Eric D. Pierce INET: PierceED_at_csus.edu 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). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Smith, Ron L. INET: rlsmith_at_kmg.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).Received on Fri Mar 09 2001 - 16:07:22 CST
 |
 |