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Backup Exec 2010 Full Backup size bigger than data size

Posted on 2011-03-19
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Hello

The data size to backup is 650 GB.
The first full backup size is about 650GB. The next week end when a full backup is done the backup size is almoust the double.
The 3rd week end the size triples and so on

My data to backup increases by 1 or 5 GB per week
Daily incremential backups are +/- 5GB

Can anyone tell me the reasoon why full backups are doubling every week ends please ?.

Thank you very much
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Question by:tgunduz
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by:Adminmaster
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hi tgunduz ,

Is your backup software symantec backup exc2010 ?
Not Sure but check the job properties ,
To my knowledge your are ur adding fresh copy of back up rather than rewriting the full back up.
let me know wht exact software your using . then will answer it more correctly.
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by:tgunduz
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hi admin
sorry
yes my software is symantec backup exec 2010
thanks
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by:Adminmaster
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hi tgunduz ,
I job properties --> setting --> genaral ---> Backup Method for files  in drop down menu , I think you selected  full -back of files and in that copy the files instead of using archive bit(reset archive bit)

hope this helps.

Pls let me know any  more doubts.
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by:tgunduz
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hi
In job properties --> setting --> genaral ---> Backup Method for files  in drop down menu
using archive bit(reset archive bit)  is selected. See the selected option is same as what you describe - (It is french unfortunately )
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by:SelfGovern
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What are you backing up to?  This may be a silly question, but are you backing up the backup -- that is, is the backup going to a disk that is also attached to the server and so it's backing up backup job 1 on week 2, and then backup job 2 on week three?
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by:noxcho
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Do you use deframentation software on this server?
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by:gheist
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Size of full backup is ~size of data, every full backup takes exactly that space. Unsless you set reclaim/expiration rule for media set nothing happens with old data at all.
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by:tgunduz
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SelfGovern
I m backing up Adobe,Corel,M$Office Files. I am not nacking up the backups
I have daily incremential backups-Their size are alwas regular
I have full wek end backups

noxcho
No. Even not Windows Backup
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by:gheist
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Yes, every full backup uses all space. I have no idea why you are making them on D2D. There is no speed penalty accessing 1000 increments on hard drive.
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by:tgunduz
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gheist
I am afraid I did not understand you
My 1st full backup takes about 650 GB.
The following one doubles and so on ...Even if I buy 10To space that will fill up entierly in 2 3 months or so

I was using BE 7.x for 6 years without singe issue with same policy.
Thanks
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by:gheist
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Do i get you correctly now :
1 backup = 1x data
2nd = +2x data = 3xdata
3rd = +3x data = 6x data
?

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by:tgunduz
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1 backup = 1x data
2nd = +1x data = 2xdata
3rd = +2x data = 3x data
fit more to my position
after 3rd backup I have no space to confirm the result as backuip fails with no more diskspace
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by:noxcho
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What is the initial size of disk, partitions and used space you take backup from?
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by:noxcho
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I would suggest you taking increments instead of using full backup approach.
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by:gheist
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Sorry it is completely logical. You can set up expiry rules to delete old backups.
Is there any reason you use weekly full backups? Since you back up to the disk there is no punishment in accessing years worth of increments.
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by:tgunduz
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Folder to backup is localted on Part1 . Part size 1.2Tb / folder size 650GB - 50% free space

Backups are done to Part2. Part size 1.6To -- 99% full
There 2 B2D folders
WEEEK for full backups - - Actul size is 1.5Tb
DAILY for incrementials - Actul size is 45GB - size ~ 40/45GB

Thank you
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by:noxcho
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As mentioned above you need to use the rule that deletes old backup before creating new full backup. Without retention policy no huge space would solve your problems.
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by:gheist
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Why are you partitioning AT ALL
Make one full backup for life and live with increments. This is the wat D2D backup works best (And TSM backup system does by default)
Tapes has seek times of minutes instead of milliseconds, so even a single increment is a huge restore time punishment.
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by:tgunduz
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noxcho:
>As mentioned above you need to use the rule that deletes old backup before creating new full backup. Without retention policy no huge space would solve your problems.
Can you tell me where to set-up this rule please ?

>Tapes has seek times of minutes instead of milliseconds, so
It has been years I m not using any tape bcs I faced too many CRC problems fo I gave it up. But this is another story. My problem is above
Thanks
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gheist earned 500 total points
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GRT (i think is now default) automatically deletes oldest stuff
You can only set disk space thresholds etc to make it happy

I hope this applies to disk also http://www.symantec.com/business/support/index?page=content&id=TECH5459
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by:SelfGovern
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It still sounds to me like you've got your backup target disk included in the backup set.  This would exactly explain the behaviour you're seeing.   Please check, and if you can't tell what's going on, post a screen shot of your backup selection window.

It's a bad idea to delete the previous backup before its replacement is complete.   What if the system crashes during the backup, and you've already deleted your only copy?

Also -- please be aware that you have only the most modest of protection in backing up to a disk that's attached to your local system.   A fire, earthquake, flood, theft, virus, and many other things as well will take out both your system and the "backup" disk.   You need a second copy, preferably offsite, or at least locked in a fire safe.
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by:tgunduz
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Hi all
I discovered my problem
Full backups media retention period was set by default to 5 months.
Now i changed it to 2 weeks and manually started a full backup. Although the disk is almost full backup is running well. I check the progress of the *.bkf files olders one are being deleted while new *.b kf files are being created. And disk fill level remain the same.

SelfGovern
> Also -- please be aware that you have only the most modest of protection in backing up to a disk that's attached to your local system.   A fire, earthquake, flood, theft, virus, and many other things as well will take out both your system and the "backup" disk.   You need a second copy, preferably offsite, or at least locked in a fire safe.
Thank you for addition advises.
My incrementials are being uploaded on remote site.
I have another 2 sets of Full backups to removable HDDs which are away from any earthquake....

I will wait sometime for the fuill backup and grant points to gheist.

I must admit I m deceived of the Symantec Tech Support who did not call me after 4 business days I opened a case. With daily reminders by e-mail.

Thanks  
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by:noxcho
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5 months retention period is good when you have about 30TB storage =)
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by:gheist
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You can do monthly full or so.
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by:gheist
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650+30x5G= 800G/month
i.e 1 LTO tape per month or
2T disk for two...

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