Re: Recovery scenario query

From: <hemantchitale_at_charteredsemi.com>
Date: Thu, 10 Jan 2002 18:53:58 -0800
Message-ID: <F001.003ED549.20020110182019@fatcity.com>

If you don't have enough disk space to backup all the datafiles in one run .....
create alternate backup sets.
On Mondays, Wednesdays,Fridays : Backup the "Active" tablespaces On Tuesdays, Thursdays : Backup the "Inactive" tablespaces
[You could break this down further if you still don't have enough disk
space.. but I
guess you get the idea].

In case you lose the "Inactive" tablespace on Thursday evening, you need Tuesday night's
backups + All the Archived Redo Logs from Tuesday night onwards --- therefore you cannot
delete Archived Logs daily (ie, when you run your Wednesday backup you cannot delete
all the archive logs -- you must keep those from Tuesday night onwards).

[note the "keep those from Tuesday night onwards" means keep at least those
generated from the
point-in-time when Tuesday night's backup *BEGAN* not when it _ended_].

Normally, I wouldn't keep only the last two days archive logs. I'd probably keep at least
a week's archive logs on-disk.

[so ... if you backup the "Inactive" tablespaces only once a month, you
need the archive logs --
either on disk or from tape -- going back to one month].

Hemant K Chitale
Principal DBA
Chartered Semiconductor Manufacturing Ltd

"O'Neill, Sean" <Sean.ONeill_at_organon.ie> 10/01/2002 08:05 PM Sent by: root_at_fatcity.com

Please respond to ORACLE-L

                                                                                       
                        
             To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>           
                        
             cc: (bcc: CHITALE Hemant Krishnarao/Prin DBA/CSM/ST Group)                
                        
             Subject: Recovery scenario query

We perform disk-to-disk offline backups on a nighlty basis. Database is running in archived log mode. Due to space contraints (don't ask =:-[ ) we are currently forced to backup only some of the data files. The data files excluded belong to specific schema owners and are not being updated, or so I'm informed =:-0. I'm trying to get my head around what the recovery implications are if some of the data files not backed up have being updated and a recovery is required?. I expect it depends on what the recovery scenario is. So whats worst case scenario and what would my options, if any
be?.

Oracle 7.3.3, 8.0.5, 8.1.7
NT4, W2K

Se¨¢n O' Neill
Organon (Ireland) Ltd.
[subscribed: digest mode]

This message, including attached files, may contain confidential information and is intended only for the use by the individual and/or the entity to which it is addressed. Any unauthorized use, dissemination of, or copying of the information contained herein is not allowed and may lead to irreparable harm and damage for which you may be held liable. If you receive this message in error or if it is intended for someone else please notify the sender by returning this e-mail immediately and delete the message.

--
Please see the official ORACLE-L FAQ: http://www.orafaq.com --
Author: O'Neill, Sean
INET: Sean.ONeill_at_organon.ie

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).

åy«±ç…ê~'"jS‘

+r5ëp¢¹z»âqë<çÎwó9ÔPóŸ9ßÎtçTšœ8ž‚€š–'è®xš>æå‰Â'µêçzÖœqë,üÆ¢–)à.+-±:Ã•*.®Ç¥}úèšØb²f¢–)à–+-±éÝjq
+j)fzËëh.+-êî}«\ŠÜœ¢ièµá
+I_at_ND

Received on Thu Jan 10 2002 - 20:53:58 CST