Full,DIFF And TRANSACT Backups

Jan 14, 2008

But i have one issue bothering me, it will be great if someone can help me out on this

1. I take full backup on Monday 8 pm which ends at 9.30 PM
2. Diff Backup starts at 10 PM every 2 hrs till Tuesday 7.59 PM
3. Transactional Log backup is happening every 10 min till tueday 7.59 PM

Now when i restore it in the same order i get error that Log in the set is too late to apply. I have recemmonded by team to stop log backup on the time they start full backups and take transactional log backup only after differentials are restored. Now is this a correct suggestion???

Also appendin the differential backup is a good idea or overwriting them is a better approach if Database is backedup every night and Differential occurs every 2 hrs.

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Diff And Full Backups Have Same Size!

Apr 30, 2008

In what scenario – diff and full backups have same size? My guess is excessive fragmentation, any thoughts?




------------------------
I think, therefore I am - Rene Descartes

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Feb 28, 2008

Regarding backups.
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How often does the trans. logs need a back up?

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Jul 13, 2007

we have MS SQL 2005 Standard and we have setup Maint. Plans with the SQL Server Management Studio front end.

i didn't set this up, so if it's completely crazy, i'm just the messenger :)

we have two maintenance plans:

maintenance plan A (to generalize) runs its full back up, then generates its differential backups and transactional logs.

then maintenance plan B runs its full back up and generates differential backups on a second drive without transactional logs.

what appears to happen with this is MS SQL will only let us restore from the most recent differential, so if maintenance plan B's differential ran last, it renders maintenance plan A's differentials essentially useless.

the reason it was setup this way was that in theory, we wanted A to backup to one drive and B to backup to a drive that gets rotated for offsite backup.

if we're breaking diff backups, this isn't optimal. anyone have a better method for creating backups on primary backup drive and a swap out drive?

thanks

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The space allocated to the Log in question is 180 GB. During this time period I was running TLog backups every 5 minutes, yet the log continued to chew through to 80 GB used, even after the process was complete and a final TLog backup had been taken. It continued to stay very large until the Full backup was complete -- or something else that I'm unaware of completed. Like every other DBA I typically take a TLog backup to shrink the log, but what appeared to be the case here was the Full completed and it released the used log space. All said, will Transaction Log backups not free up the log during Full backups?

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Aug 9, 2007

I run two different types of backups on the same database.

A monthly full and nightly diffs appending to the same full file - file 'A'

A weekly full with 10 min trans log backups appending to same file - file 'B'- during working hours.

2 strategies, 2 backup files.

These are new strats that have gone live this week - tuesday in fact. The monthly and weekly both ran fine on tuesday as did the nightly diff and all the TS backups througout the day. last night - Weds - the nightly diff failed with the following error:

"

Executed as user: <USERNAME>. Cannot perform a differential backup for database "objectstore", because a current database backup does not exist. Perform a full database backup by reissuing BACKUP DATABASE, omitting the WITH DIFFERENTIAL option. [SQLSTATE 42000] (Error 3035) BACKUP DATABASE is terminating abnormally. [SQLSTATE 42000] (Error 3013). The step failed.

"


Whilst the error is perfectly legible I dont understand what its implying - cant I add multiple Diff backups to the same full backup OR is my weekly / 10 mins on the same database (but to a diff backup file) ballsing things up for me somehow? If this is the case how come everything ran fine on tuesday night?

Any help gets beers.

THanks

Alastair Jones.

"A computer once beat me at chess - but it was no match for me at kick boxing" - Emo Phillips.

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Sep 10, 2007

I backup a database at the begining of each month with a full and then do nightly diffs on it.

For the same database I run daily fulls and 10 minute log backups.

these two backups create / append to two different backup files.

The problem im having is that I cant restore the Differential backup set. SQL seems to restore the full just fine but alwasy throws an error when its about to start to retore the last diff. now forgive me but I clicked OK on the message and I cant find any record of the error in the logs but its something like:

"SQL cannot restore the database as the database has not been restored to the previous correct state"

is my 10 min TS log backups screwing up the DIff chain somehow?

this is really doing my head in. any help appreciated.

"A computer once beat me at chess - but it was no match for me at kick boxing" - Emo Phillips.

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Oct 17, 2005

Need help.

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Please help

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Jul 13, 2007

I have a question regarding FUll and differential backup.

We we take full or diff back up, does it create lot of logs ie. Does full or diff backup has any impact on log size?



Thanks

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Jan 11, 2001

PLEASE HELP...

WE ARE DOWNLOADING THE BACKUP FILE FROM OTHER BRANCH OFFICE AND THE FILE SIZE IS GROWING LIKE HELL SO I AM CHANGING THE BACKUP POLICY TO DOWNLOAD THE DIFFERENTIAL BACKUP FILES EVERYDAY. BUT EVEN THE FILE SIZE GROWS DAY BY DAY UNTILL WE TAKE THE FULL BACKUP THERE. SO I WANT TO TAKE A DIIFERNETIAL BACKUP AND THEN IMMIDIATELY A FULL BACKUP AT THE REMOTE SERVER END. SO MY NEXT DIFFERNTIAL BACKUP WILL HAVE THE DATA OF ONLY PREVIOUS DAY.
FOR THIS I AM SCHEDULING A JOB WHICH FIRST TAKES A DIFFERENTIAL BACKUP AND THEN IMMIDIATELY FULL BACKUP EVERYDAY AT 12.00AM.
BUT I HAVE A CONCERN.. WHILE TAKING THE DIFFERENTIAL BACKUP ANY TRANSACTIONS THAT ARE TO BE COMMITED WILL NOT COMMIT UNTIL THE DIFFERENTIAL BACKUP COMPLETES. BUT IMMIDIATELY I AM STARTING FULL BACKUP. IS THERE ANY CHANCE THAT A TRANSACTION GETTING COMMITTED IN BETWEEN THESE TWO STEPS. IF SO IS THERE ANY WAY .. NOT RELEASE THE DATABASE UNTILL THESE 2 BACKUPS ARE COMPLETED?? I AM RUNNING IT AS A JOB..
ANY SUGGESTION??

THANKS IN ADVANCE.. :-)

KUMAR

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Thanks

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Has anyone seen this before?

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Because this backup is listed as the last full backup and will not restore, it is causing a problem with our disaster recovery plans as nothing will restore from this point forward to the next full backup.

Does anyone know how a backup record like this can get created, and/or how to find the source. The backups are listed in the backupsets table in msdb - are there other system tables that may hold some clues as to the source of these backups?

Any help or direction would be appreciated.

Thanks

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I make two full backups on Oct 1 and Oct 10. I want to restore the server to a state in Oct 5. So I just do as follows:

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2. Restore the server with Oct 1 full backup with NORECOVERY option.
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But the restore fails and SQL Server said the transaction log does not contain the point. The point is too early. Why? Also my .LDF file is about 13G, but the transaction log backup is only 200MB. Why?

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My question is should I be using "with init" for the transaction log backup or allow it to accumulate until the next differential backup?

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May 12, 2008

Hi sql server experts.
This is a beginners question.



Let's say, I run a full backup at 4:30 am it takes usually 35 minutes to finish.

I want to schedule a differential backup to run every hour.

Should I start this job at 5:10 after the full backup finishes? or it doesn't matter?
I am confused about timing.

Let's say my full back up takes 1 hour to finish, that means that when the differential backup runs the full backup will be still running, so in case I need to restore the database, can I use this differential from 5:10 or the differential from 6:10.

Same issue with the transactional, the job runs every 30 minutes, should I started after the differential is done?

I am so confused, what happens with the backups jobs that run while other backups are running?

Is this something that should never happen.

Please advise.

Thanks

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Mar 16, 2001

Hi All,

Is there a way to suppress or re-direct the messages that result from a tran. log dump? We're running a tran. log dump every 15 minutes in prod. and the errorlog is really cumbersome to look at.

(In another RDBMS I worked with all backup messages went to a separate error/message log.)

TIA!

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I make two full backups on Oct 1 and Oct 10. I want to restore the server to a state in Oct 5. So I just do as follows:
 
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I make two full backups on Oct 1 and Oct 10. I want to restore the server to a state in Oct 5. So I just do as follows:

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Afternoon,

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If I were to execute the full backup on one of these Log Shipped DBs ... how would it affect the log shipping process?

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