Incremental backup plan

Hi All,
I have joined a company. Here we have 5 database with size 50,25,15,10,8 GBs
RMAN daily full backup is taking to tape library directrly. And the retention set to recovery window to 100 days .Below is the script using for the same.
run {
sql "alter system archive log current";
sql "ALTER DATABASE BACKUP CONTROLFILE TO TRACE";
backup current controlfile;
allocate channel t1 type 'sbt_tape' parms 'ENV=(tdpo_optfile=/opt/tivoli/tsm/client/oracle/bin/tdpo.opt)';
allocate channel t2 type 'sbt_tape' parms 'ENV=(tdpo_optfile=/opt/tivoli/tsm/client/oracle/bin/tdpo.opt)';
backup format 'df_%t_%s_%p_%u_%c' tag Daily_Full_Hot (database include current controlfile);
backup archivelog FROM TIME 'SYSDATE-5' format 'arch_%d_%u_%s';
delete noprompt obsolete;
release channel t1;
release channel t2;
And delete archive log input in some days with comamnd - delete archivelog until time
1 - I want to schedule the RMAN backup - Daily incremental and Weekly full backup.
- Please help me for a good script to satisfy my request.
2 - Which is a good one - Incremental or full backup
Thanks,
Sam

1) allocate channels and then call below commands
For weekly level 0 backup:
BACKUP incremental level 0 database plus archivelog delete all input;
For daily level 1 backup:
BACKUP incremental level 1 database plus archivelog delete all input;
2)As your DB sizes are less, Its better to go for Full backup.

Similar Messages

Monthly Backup Plan using Incremental Backups

I would like to have a monthly backup plan as explained in the oracle documentation:
First Friday of the month: Full Backup (Incremental Level 0)
Monday, Tuesday, Wednesday, Thursday: Incremental Level 1
2nd, 3rd, 4th Friday: Cumulative Incremental Backups Level 1
As I understand is that the 4th cumulative incremental backup will contain all the changes from the full backup.
Is there any way so that the 4th friday backup will contain only the changes since the 3rd Friday and so on?

user12075536123 wrote:
Thank you for advice.
I understand Oracle has "backup level 0-4"
I checked the document
http://docs.oracle.com/cd/E11882_01/backup.112/e10643/rcmsynta007.htm#i78895
INCREMENTAL LEVEL integer
Copies only those data blocks that have changed since the last incremental integer backup, where integer is 0 or 1
I understand Oracle has only level 0 and 1
I tested
==================================================
RMAN> backup incremental level 0 database;
Starting backup at 18-SEP-13
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=64 instance=orcl device type=DISK
channel ORA_DISK_1: starting incremental level 0 datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
Finished backup at 18-SEP-13
RMAN> backup incremental level 1 database;
Starting backup at 18-SEP-13
using channel ORA_DISK_1
channel ORA_DISK_1: starting incremental level 1 datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
Finished backup at 18-SEP-13
RMAN> backup incremental level 2 database;
Starting backup at 18-SEP-13
using channel ORA_DISK_1
channel ORA_DISK_1: starting incremental level 2 datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
Finished backup at 18-SEP-13
RMAN> backup incremental level 3 database;
Starting backup at 18-SEP-13
using channel ORA_DISK_1
channel ORA_DISK_1: starting incremental level 3 datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
Finished backup at 18-SEP-13
RMAN> backup incremental level 4 database;
Starting backup at 18-SEP-13
using channel ORA_DISK_1
channel ORA_DISK_1: starting incremental level 4 datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
Finished backup at 18-SEP-13
RMAN> backup incremental level 5 database;
Starting backup at 18-SEP-13
using channel ORA_DISK_1
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of backup command at 09/18/2013 21:32:58
RMAN-06011: invalid level specified: 5
==================================================
why！！
Since there is no documentation of any level beyond 1, I can only guess that it is for backward compatibility.

Is incremental backup possible for archivelog.

Hi expert
i want to plan weekly and daily backup with windows redundancy 14 days.
full archivelog backup script
run
BACKUP AS COMPRESSED BACKUPSET
INCREMENTAL LEVEL = 0
DEVICE TYPE DISK
TAG = 'WEEKLY_ARCHIVELOG'
FORMAT '/oracle/ITB/db/apps_st/rman_backup/weekly_archivelog_%d_t%t_s%s_p%p'
ARCHIVELOG FROM TIME 'SYSDATE-7';
daily backup script
run
BACKUP AS COMPRESSED BACKUPSET
INCREMENTAL LEVEL = 1
DEVICE TYPE DISK
TAG = 'DAILY_INCREMENTAL_ARCHIVELOG'
FORMAT '/oracle/ITB/db/apps_st/rman_backup/daily_incremental_archivelog_%d_t%t_s%s_p%p'
ARCHIVELOG FROM TIME 'SYSDATE-1';
my question that if i will take backup then, will be any gap in sequnce
and second question is that ---is there incremental backup possible for archivelog.
os =aix6 and database 10g2

afzal wrote:
Dear Sir,
ok question number 2 is clear that incremental backup is not possible but still confuse
about sequence
if i did take backup of 17 feb at 12 o'clock seq 1,2,3,4
after that i did take backup 18th fab 1 pm then it will take from 6,7,8-------seq 5 is missing
please please correct my archive log script for weekly and daily backup with windows redundancy 14 days
again please correct my script
thnaksWHy you think the archive log file number 5 will be missing? RMAN automatically archives current redo log files and backups it
Why you don't test your backup script by your own and check results? Never trust anyone on your critical databases' backups, do it by your own!
Kamran Agayev A.
Oracle ACE
My Oracle Video Tutorials - http://kamranagayev.wordpress.com/oracle-video-tutorials/

RMAN - Incremental backup / NOARCHIVELOG / Restore & Recover Until Cancel

I'm testing out a weekly plan as follows:
Sun : Shutdown db, RMAN level 0 Incremental Backup
Mon-Sat: Shutdown db, RMAN level 1 Incremental Backup.
The database is NOARCHIVELOG mode and is 10.2 XE.
I then run a restore (which I understand to be to move the datafiles from the backup set to their online location). My next aim is to do a recover.
I'm really confused at this point. Say I take the backup the night before (either a level 0 or 1, I'm assuming that this makes no difference) then in the morning I drop a table accidentally. Okay - I want to go back to the position after the backup. When I do recover, I understand that Oracle applies redo logs written since the backup.
So I don't want a recover, I want a recover until cancel. When I issue this command it is suggesting that I use an archive log file. Well obviously I don't have any of those so I press cancel thinking that this will bring me back to the point EXACTLY AFTER THE NIGHTLY BACKUP and with my table back. But it doesn't!
I would be really grateful if anyone has a definitive answer to this - what are the steps to recover a database to the point after the backup was taken ignoring any changes since the backup.
Thanks all.
Tom.

Hi Werner
Do you mean if the online logs are available with the changes after the last backup until the database restore then there is a possibility to apply changes? Ie at this point I could put in the redo log names instead of the archive log names.
If they have been overwritten since the backup (ie cycled round completely) then is the behaviour to restore the database and then not apply any logs?
Do you know if this is documented anywhere? There seems to be an emphasis on ARCHIVELOG mode only, especially in the books I have seen.
Thanks,
Tom

Incremental Backup in SAP

Hai Friends,
We Planned to take a remote backup in production server. For that we are using brtools for backup and edit the initSID.ora file.
We are planned to copy the files to the remote server for every one hour. ie we planned to take incremental backup using BRtools.
simply, I need a help for taking incremental backup in our production server using BRtools.
Thanks in Advance
G.G.Karthickbabu

Hi. Read http://help.sap.com/saphelp_nw70/helpdata/EN/54/e48f5985097648a31b67a9eee883b4/frameset.htm
http://help.sap.com/saphelp_nw70/helpdata/EN/0e/f10a7443d711d29fef0000e8a5ae06/frameset.htm
http://help.sap.com/saphelp_nw70/helpdata/EN/87/e4eb7c2cc35242a01ae5f592df71af/content.htm
Regards.

Automatic Offline Full Backup Plan: CQ5 Installed As a Service

I have designed an Automatic Offline Full Backup Plan for CQ5 Installed As a Service. I welcome your comments.
Do you have any better way (scripts)?
Offline Full Backup Scripts for Author
:: offlineAuthorBackUp_CQ5AsService.bat
:: Stop CQ5 service
chdir /D %~dp0
net stop cq5
::copy all files and folders to the destination
mkdir h:\cq5backup\offline\author\backup
::robocopy only copies the updated files, so it is very quickly
c:
robocopy /MIR c:\cq5\author h:\cq5backup\offline\author\backup
:: Start CQ5 service
net start cq5
::Zip the backup with 7z.exe
h:
cd h:\cq5backup\offline\author
7z a -y -tzip offlineAuthorBackup_%date:~4,2%%date:~7,2%.zip h:\cq5backup\offline\author\backup

There is one big advantage of a clone. You can immediately reboot
to it and continue working and deal with the regular boot drive faiure,
what ever it may be, later. Especially since all your data and such
is on another drive. If you use your computer for work and time
critical projects, this is a major plus!
In the case of a hard drive failure/replacement, copying the clone
to the drive is the fastest way to get the system and all your settings
back.
Time Machine and incremental backups have a place as well. It is best
suited for "incremental" problems. Examples are installing an upgrade to
software that doesn't work or just don't plain like. With Time Machine it
is easy to just restore back to the point before the install.
Something else I do is backup current project files to USB memory sticks.
If you are using your computer for business, you can never have too many
backups. Coralllary 456 of Murphy's Law is the "number of backups that
you need will be one more than what you have!"

Backup Planning

Hi, Guys. Just need your comments on my backup plan changes.
Since my database is now too big, I would like to make daily tablespace backup instead of weekend whole database backup. Suppose I will backup like this:
Monday: SYSTEM + SYSAUX tablespace
Tudesday: APP_1
Wednesday: APP_2
Thursday: APP_3
Friday: APP_4
Staturday: APP_5
Sunday: APP_6
I configure the record keep time of control file to 8 days and backup archivelog for every backup. Delete obsolete on every backup. A few concerns here:
1 - I'm not able to do PITR to time before last tablespace backup, right?
2 - I need to restore evevery data file from backups to do PITR, right?
3 - UNDO tablespace (I configured a undo tablespace under auto-undo management option) is not backed-up since I assume it can be re-configure in mount state before doing recovery of datafiles, am I right?
Thanks for any inputs, again.
G.B.

Hi
How big is your database? How many tablespace do you have? How big are they? Do you have read only tablespaces?
I would like to make daily tablespace backup instead of weekend whole database backup.
What for a backup, incremental 0, incremental 1, cumulative, differential, full?
1 - I'm not able to do PITR to time before last tablespace backup, right?
You must have at least one tablespace backup at the level 0. After that you can do all what you want/need.
2 - I need to restore evevery data file from backups to do PITR, right?
Yes
3 - UNDO tablespace (I configured a undo tablespace under auto-undo management option) is not backed-up since I assume it can be re-configure in mount state before doing recovery of datafiles, am I right?
How big is you UNDO tablespace to don't backup it? Usually you include this tablespace in the backup too.
Bye, Aron

Adjusting my backup plan with Lion and TM Plus Clone

Hi all, I am rethinking my backup plan for when I rollout Lion in my business. Currently in SL, we have clones scheduled to run every nite doing incremental backups and then we rotate the disks out periodically for offsite storage. Now I am thinking that since my testing shows that TM works really well in Lion, that we should use that as well. So I noted this week that, on average, TM eats up about 10gigs per day on the backup drive. Our installs / data per machine amounts to (let's round up to reduce the math) 250gb, and our drives are all 500gb total. That means that TM will cycle back every 25 days or so, yes? So if I reduce the clone schedule down to once every three weeks, things should be covered - right? Thx for any comments!

Sounds right.
Make a bootable clone with CarbonCopyCloner as well, then you can really sleep good at night. In case of catastrophic failure

Restoring the DB with Online and incremental backup's

Dear Experts,
We are planning for a backup strategy on our Production system as below using BRTOOLS with RMAN - " Weekly Full Online Backup and Incremental backup on the remaining days'
We need to test this before implementing it on Production system, could someone please help me with the step-step procedure/documentation for restoring the DB using "an online backup, incremental backup's and redo logs " and prerequisites if any??
Many Thanks !!
Regards,
Sri

Hi Sri,
please have a look at the following
http://help.sap.com/saphelp_nw70/helpdata/en/0d/d3077b4a0c11d182b80000e829fbfe/content.htm
https://help.sap.com/saphelp_nwmobile711/helpdata/en/47/18cb034de863efe10000000a114a6b/content.htm
Best Regards
Marius

Carbon Clone and Time Machine: developing a backup plan

Howdy all!
This is a second post that sort of flows on from another I have written today
https://discussions.apple.com/thread/4649740
I initally put them all together, but they were too rambling and disconnected, so it seemed better to seperate them. The question I have here is how best to organise my backup plan? I have a few ideas, but, basically, want to make sure I get the whole setup right the first time and would appreciate any advice from others that have been down the path before. As I am still waiting for some parts to arrive in the mail, I have a little time to think about how to go about setting up my Mac.
Basically the setup is:
Mac Mini 2012, boot drive is a Samsung 256GB 830 series SSD, seconday drive for data is a 1TB mechanical disk. I plan on having all my data on the seconday mechanical disk (photos, movies, music etc) and only the OS and Applications on the SSD. To this end, I understand I only have to move /Users to the mechanical disk to achieve this. I then also have 2x 2TB Western Digital MyBook Essential USB 3 disks for Time Machine backups. I plan on rotating them on a weekly basis (storing the disk not in use in a safe or offsite), and then, depending on costs a cloud backup service for some data (music, photos etc) which I might want to access when im not at home.
So I have been thinking for a few days now on the benefit of having a Carbon Clone bootable recovery drive. The thinking goes along these lines. As my data is on a seperate drive, and is backed up to Time Machine, in the event of an OS disk failure, I can replace the disk and then point /Users to the new drive, and I can be up and running once I have reinstalled the apps i need. Now, I understand the idea of the Carbon Clone backup is such that it speeds up the time to rebuild the OS disk, but I have to question, how useful is this in reality?
Consider, I can sit down now and write down all the apps I have needed in the past, install Mac OS, set it up (possibly with a generic admin password), install the apps I need from the App store and DVDs etc and then take a Carbon Clone at this point before any setup of Apps are done. If the apps configuration is backed up in the Time Machine backup (i.e.: the config files exist under /Users) then this is almost workable - in a recovery situation, the CC clone is used to rebuild the OS drive, the config files are pulled from the TM backups, and we're back up and running. Where this fails, is if I have installed (or removed) apps since the CC clone was made. At this point then, is it best to (a) make a new clone when a new app is added/removed or (b) make a note of apps added/removed, which will then have to be reinstalled if a recovery is required. I tend to think the (b) method is best here, as it preserves the integrity of the clone. If the machine has been compromised (malware etc) then remaking the clone, causes the clone to be compromised and hence the reinstalled machine as well. Though this method could be a pain if the machine state has changed somewhat over time. Also, it means that the reinstalled system will be missing updates etc which could be time consuming to apply anyway, so the usefulness of a clone is slightly reduced anyway.
Does anyone have any thoughts on this? Some days I think having a clone will be useful esp. as most of my software was delivered on CD (Adobe Creative Suite, Office) or are large install bases (XCode), but other days I think, "its not a mission critical machine", i can survive a day without it while I rebuild the install, and so I dont achieve much by having a clone which is likely out-of-date by the time I go to use it.
Also, in this backup plan, is it best to rely on TM for things like email backup or a dedicated mail backup utility? can a Carbon Clone exist on the same disk as Time Machine uses, or do I need to invest in a new disk or two for the CC clones?
As I say, I want to make sure I have this machine setup right from the start, and would really appreciate any pointers, tips or advice.

There is one big advantage of a clone. You can immediately reboot
to it and continue working and deal with the regular boot drive faiure,
what ever it may be, later. Especially since all your data and such
is on another drive. If you use your computer for work and time
critical projects, this is a major plus!
In the case of a hard drive failure/replacement, copying the clone
to the drive is the fastest way to get the system and all your settings
back.
Time Machine and incremental backups have a place as well. It is best
suited for "incremental" problems. Examples are installing an upgrade to
software that doesn't work or just don't plain like. With Time Machine it
is easy to just restore back to the point before the install.
Something else I do is backup current project files to USB memory sticks.
If you are using your computer for business, you can never have too many
backups. Coralllary 456 of Murphy's Law is the "number of backups that
you need will be one more than what you have!"

Input on backup plan

Hi all,
After much investigation and some great suggestions and information from members of the forum, I have decided on a plan for OS/apps drive security and data/work files backup for my Mac Pro.
For boot/apps drive reliability (not backup) I am going to try a RAID mirror config on the initial 320GB drive in bay#1 and a second WD 320GB drive in bay#3 (see illustration below for visuals). That should give me confidence knowing that I have an exact and current copy of the OS/apps drive in case the main OS/apps drive goes down. I will be able to seamlessly continue work flow.
My plan for backup of the data/work files drive, 500GB in bay#2, is to schedule regular incremental backups with Retrospect Express (or something similar) to an external 1TB FW drive. For cost effectiveness, I bought a FW drive with only 3 interfaces (FW 800 which I am using, FW 400 and USB 2). One question regarding the FW drive is that it has 3 options on the power switch, off, auto, and on. I am running the drive in 'auto' mode right now. I imagine that is an energy saver and easier on the drive. Is this the case?
I would love to have stayed strictly SATA and gotten a Firmtech dual hotswap case with PCIe controller card and an eSATA drive, but the budget has already gone rogue on me, lol. Anyhow, one of the best bits of advice I got was that the important point is to make a decision and do something, and what works for one person may not be the best solution for another. I always invite informed opinions though. I have been learning a boatload over the past few weeks. This forum is a fabulous and endless source of generous information.
Here's the illustration:
Thanks to all who gave valuable insight and informative links.
Best,
Dennis

Dennis,
Your original post does not describe the nature of the work that you do on your MacPro. I have a MacPro 8-core that is my principal machine for photography (21MP RAW files using Lightroom 2.2, Photoshop CS4) and video editing (iMovie, Final Cut Express). Currently my video files occupy 1TB of drive space, my photography library is about 700GB.
Here is my set and regardless of your application, I think that you would be well served by same:
Bay1 - 1TB with 2 partitions: 900GB for OS, apps and standard User folder stuff (iTunes, some video, documents, financial stuff), and 100GB partition for Bootcamp/WinXP Pro for PC only games.
Bay2 - 1TB drive with 2 partitions: 100GB scratch disk for Photoshop and 900GB for SuperDuper clones of Bay 1 boot drive.
Bay3 and Bay4 - 2 x 1TB drives in RAID 0 configuration for 1.8TB of actual fast storage for working photo and video files and my Lightroom library.
*If I were you, the first upgrade I would make would be a pair of matched drives to create a RAID 0 using 2 bays of your MP. This almost doubles your effective read/write times over a single drive of the same type.*
To back up and off load files that are not needed but need to be kept accessible, I use a SansDigital 5-bay external eSata tower connected to a HighPoint eSata host PCIe card installed in slot 4 in my MP. The SansDigital unit is very quiet and sits next to my MP. I use in a JBOD configuration (5 separate hard drives, 3 x 1TB and 2 x 750GB). I used to use single external FW800 drives for extra storage, but I quickly outgrew them and they created lots of clutter around my work area. My working files from my RAID 0 are backed up to a ReadyNAS NV+ on my gigabit network in a RAIDX (redundant) configuration with 4 x 1TB drives for a total capacity of 2.8TB.
Critical data, photos and video archives are backup up weekly to my old single external drives which I rotate through a safe deposit box at my local bank for secure offsite storage.
And finally, I have an older Lacie 1.5TB USB external drive connected to my Airport Extreme for Time Machine backups of my User folders on my MacPro, MacBookPro and my kids' iMac and my daughter's MacBook. This works seemlessly.
For back up software, I actually mirror my data folders rather than make incremental backups. Do it this way allows me instant access to any of my files without having to go through a restoration process.
For software, I've tried many and for a few years I was sold on Chronosync. For the past few months, however, I've been using Synchronize! Pro X instead. SPX works faster and more reliably on my network than Chronosync.
Obviously, I have a considerable investment in my hardware, but I built it up over time. I have learned a lot from other posters in forums like this. Another great resource to check out for MacPro owners is www.macgurus.com. They have some great detailed articles on building RAIDs and other storage speed tips.
Good luck on building your system.
Bud James
North Wales, PA

Question about using an incremental backup to update a standby

We have a 2TB Oracle 10g database with a standby and the application that uses it is about to be updated. We're using cumulative incremental backups with block change tracking to back it up with weekly level 0 backups. The application upgrade will be making a lot of changes (several hundred GB) and we have stop the standby during the upgrade process as a quick way to get back (we don't have the space for a flashback recovery) in the event that there are issues with the upgrade. We can just let the archivelogs back up and get them over to the standby and applied once they decide they like the upgrade but, it looks like it would be simpler and perhaps quicker to use an incremental backup to update the standby. I probably won't but, If we do that, it looks like we can turn off archivelogs in the primary and not deal with them at all. I've never tried this but, I do have some questions.
Does it make sense to take this approach?
If we were to turn off archivelogs in the primary, would that have any effect on block change tracking? I don't see why it would but, had to ask. Of course, we would turn archivelogs back on and take a level 1 backup after the upgrade.
Thanks in advance for the education.

Funny you should mention that rolling upgrade, I'm actually planning to do that in another environment. My testing says it works pretty well and I'll be able to move a 400GB database to new hardware and upgrade it to 11g with very little downtime. However, in this case, the database is not being upgraded. The application is. It's just that, as part of that upgrade, there are a lot of updates and I'd just as soon not deal with the archivelogs for that. Here's what I was thinking about:
Set logs shipping to defer in the primary.
Stop log apply in the standby.
Turn off archivelogs in the primary.
Do the application update.
If they like the results, turn archivelogs back on in the primary.
Take an rman incremental backup from scn in the primary.
Apply the incremental backup to the standby.
Start log log apply in the standby.
Start log shipping in the primary.
The process for getting and using the incremental is described here:
http://docs.oracle.com/cd/B19306_01/backup.102/b14191/rcmdupdb.htm#BGBCEBJG
This isn't your regular incremental backup.
So, am I the only crazy one? Has anyone else tried this?

Question on Differential Incremental Backup script.

Version:11g
OS : AIX 5.3
I only have theoretical knowledge of RMAN. I am planning to implement Differential Incremental Backup for my database. My strategy is
a. Weekly level 0 backup at Sunday morning 2:00 am
b. Daily Level 1 Differential Incremental Backups at 2:00 am from Monday to Saturday.
c. Backup all archived log filesFirst script to perform level 0 backup -- This script will be run by a cron job every Sunday morning 2:00 am
==================================================================
run {
allocate channel ch1 device type disk;
backup incremental level 0 format '/u07/rman_backup/FULL_%d_%u' database tag "weekly_full";
backup format '/u07/rman_backup/RMAN_CTL%s:%t:%p.bkp' current controlfile;
release channel ch1;
allocate channel ch1 device type disk;
backup (archivelog all format='/u08/rman_backup/archbkp_dir/ARCH_%d_%T_%u_s%s_p%p' DELETE INPUT TAG "archivelogs");
release channel ch1;
}The below script is to perform level 1 Differential Incremental Backups for the next 6 days. This script will be run daily
at 2:00 am monday to saturday by a cronjob. I'll create 6 scripts like below, the only difference being the TAG "Monday-level1","Tuesday-level1"...etc.
=======================================================
run {
allocate channel ch1 device type disk;
backup incremental level 1 format '/u07/rman_backup/RMAN_DBF_%s:%t:%p.bkp' database tag "Monday-level1";
backup format '/u07/rman_backup/RMAN_CTL<%s:%t:%p>.bkp' current controlfile;
release channel ch1;
allocate channel ch1 device type disk;
backup (archivelog all format='/u08/rman_backup/archbkp_dir/ARCH_%d_%T_%u_s%s_p%p' delete input tag "archivelogs");
release channel ch1;
}Question 1.
Is my level 1 script correct ?
Question2.
Will the above scripts for level 0 and level 1 automatically delete the
obsolete level 0 and level 1 backup files when a new weekly cycle starts?
Any more enhancements(or corrections) you gurus want to suggest?

Above scripts seems to be correct.
Why you don't test it on test environment?
These codes don't delete obsolete backups of the database. Then just delete backed up archived redo log files due to DELETE INPUT command
If you use retention policy to recovery window of 7 days, to delete obsolete backups you need to run CROSSCHECK command and then DELETE OBSOLETE to delete all obsolete backups
My suggestions
- Practice it on test environment
- Read documentation before performing any tests
- Try to understand each line of these scripts based on documentation

External HD -`Incremental backups`

I bought a 320G external HD - it works great and I have now initiated a regular Friday night backup plan for both iTunes and iPhoto - it does all this fine.
When I check the HD next day, I always see the initial `full back up` and also the last one (there`s only one `incremental`at the moment since last Friday was the first upload of the `plan`) I did which is listed as `incremental backup`. My question is, "do I need to still keep the previous (and full) backup after the last one has uploaded to the HD and if I don`t do I just drag ALL the superseded ones to trash" ?
Russell (Uk)

I just checked the help file and it states;
- Save space with occasional forced backups.
The first backup of a particular set of files is a "full backup" (all files are backed up). Subsequent backups are incremental—that is, only the changed files are backed up. Incremental backups take up less space than full backups. After you use Backup for a while, you may want to force a full backup so that you can delete incremental backups to save space.
From the sounds of it, each time backup runs the 'incremental' option you will be left with a new file and your original 'full back up' will not be updated. Considering that you have a 320 GB external HD I don't think that you'll be short for space doing a "full backup" every Friday.
I have the program backing up my entire home folder once a week. This includes my photos, itunes, and documents.
Best of luck!

I am trying to restore my catalog having previously done a back up to an external hard drive and subsequently an incremental backup. I am using Photoshop Elements 11 and the only option given in the restore procedure is to open a .tly file.

I have done this but now the restore function is asking for yet another file, which i assume to be the original back up, but that is the only .tly file since the only other relevant file appears to be called catalog.buc but that is just not visible when using the restore function? How do I continue from here with this restoration of my catalog?

Martin_Had a écrit:
Thank you Andaleeb. I appear to have an old backup of a year ago, and a more recent full back up plus an incremental backup.
Regrettably I don't really understand what is going on because firstly the restore does not complete its cycle so I cannot see what that backup file contains and secondly all I have read would suggest that the .tly file is the full backup and the catalog.buc file is the incremental backup. For the present, the catalog shows the photos for 2014 which makes me think I might have backed from the old back up file.
I am minded to create another catalog and try again.
Any views on what I can do?
A backup (full or incremental) is a folder, not a file. It contains renamed pictures file copies as well a copies of the files and subfolders of the original catalog. The catalog.buc is a renamed copy of the database of your original catalog while the backup.tly. That backup.tly file contains the information to restore the renamed pictures where you decide, the original location or a new custom one. You can't do anything with the backup yourself, only the restore process can do the job if it finds the backup.tly file. In the case of an incremental backup, you have to tell the restore process where to find the incremental backup folder; it finds the backup.tly file in that folder and finds what is to restore there; then it asks you for the previous backup folder (in your case the full backup); you then browse to that full backup folder so that the restore process can find find the backup.tly there; the restore then deals with the rest of the files to restore.

Incremental backup plan

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