DB Engine :: Will Transaction Log Backups Not Free Up Log During Full Backups
Nov 15, 2015
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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Oct 9, 2015
I'm requesting of our dba that he create a database with recovery simple for my peer and I to start using. I'm asking him to give us db owner on this db so we can create schemas, tables, views, procs, do table inserts, deletes etc etc. what sql permission (if any) would allow my peer and I to do a backup once in a while to the default sql directory for backups? And for that matter a restore from there.
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Jun 7, 2015
My environment looks like:
- Windows 2008R2 SP2 VM (VMware 6)
- SQL 2012 SP2 Std.
- NetApp iSCSI LUNs, Snapmanager for SQL
So I have created a test database and configured the logs to grow to max. 120MB in size.
To check the allocated and free space I right-clicked the database -> tasks -> shrink file
I see currently allocated: 5,00MB and 2,50MB free space for the MDF Database
I see currently allocated: 1,00MB and 0,63MB free space for the LDF Logfile
Next I use a data generator to fill the database with random data.
After adding around 500k rows I check the size again:
I see currently allocated: 17,00MB and 0,44MB free space for the MDF Database
I see currently allocated: 61,94MB and 0,27MB free space for the LDF Logfile
Next I take a full backup incl. truncating log files. After that I check the size again:
I see currently allocated: 17,00MB and 0,44MB free space for the MDF Database
I see currently allocated: 61,94MB and 57,24MB free space for the LDF Logfile
So now my question is where are those 56,97MB? I imagined they should now be added to the MDF file but they seem to be just gone. I did this procedure 2x more time and the MDF stays the same size while the LDF is almost empty after backups. Then I thought maybe its in the memory of the server so I rebooted it. But still the MDF has the same size... Is this normal? How it should work?
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Oct 21, 2015
how to restore database backups with different recovery fork. I have 1-full backup 2-diff backups and 10-tran backups. My prod database in mirror, so after error, switched to mirror with "allow_data_loss" option. And now I have full and diff backup with one recovery fork GUID and other backups with another GUID.So the question is, how to restore all this backups if in middle of restoration will be different recovery fork.Tryed to restore log backups with new fork guid and got error:This backup set cannot be applied because it is on a recovery path that is inconsistent with the database. The recovery path is the sequence of data and log backups that have brought the database to a particular recovery point. Find a compatible backup to restore, or restore the rest of the database to match a recovery point within this backup set, which will restore the database to a different point in time.
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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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Apr 27, 2001
I have daily scheduled full backups of each database and log backups scheduled for every 2 hours. My question is should they be scheduled for overwriting or appending? I have always had them set as overwrite, but I don't know if that is correct? Any recommendations would be appreciated
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Mar 28, 2007
Does the full and differential backups have to be in the same location or can I do a once a week full backup on one drive and everyday differential backups on a different drive?
Thanks
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Jun 12, 2006
Has anyone seen this before?
Every Sunday morning (a different time each week) there is a full backup created for every database on the server. The backup is not a scheduled backup from any maintenance plan or SQL Agent job. The backup set is unrestorable and has a strange name in the format of 'DBNAME_00_12c95fb7_399d_41ce_9a0d_b5728b6a00ba_'
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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Oct 23, 2015
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:
1.Perform a transaction log backup on the server on Oct 23. I have never backup transaction log in the past.
2. Restore the server with Oct 1 full backup with NORECOVERY option.
3.Try to restore to the point at Oct 5 12:00, with the transaction log.
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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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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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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Mar 21, 2008
I am running a full backup quarterly using "with init" to overwrite the existing file if it is still on the server. Then I run a differential back weekly using "with init". Finally I run a transaction log backup nightly using "with init".
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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Nov 15, 2001
I setup a maintenance plan to create full backups every night and to backup the transaction logs every hour. In the backup log, it always fails on backing up the transaction log for Master and MSDB. I believe this is because the recovery model for these two databases is set to "SIMPLE". Is it ok to change the recovery model on these two system databases to "FULL"?
Thanks,
Ken Nicholson
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May 9, 2001
I am trying to create a backup for the transaction logs on one
of the databases I support. The problem is in EM, the only
options it gives me are a Full DB Backup or a Differential DB
Backup. I have other DB's with TL backup's, why can't I on this
particular one?
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Mar 31, 2004
I have 5 databases on my sql server and they are taking backups on everyday twice. ANd we are not taking any transactional log backups.Now i have very larger log files which are more than 6 GB each.And the databases are less in size compared to the logfiles.
Should I take transaction log backups with truncate option...
PLease suggest me the best stratagy i should follow to overcome the problem.
Thanks.
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Mar 13, 2008
Yesterday I received a message from the Trans Log backup job that it could not complete because a full backup wasn't completed. I checked and a full backup was completed that morning 5:00 AM. This happened during the 4 PM run and again at 5 PM. There was enough space to do the backup, even though I did a shrink file on the log. I, also, ran another backup between 5-6 PM. Between both of these activities, the job completed during the 6 PM run. Is this a common occurance? Has anyone else seen this happen. I am curious. Any light that can be shed on this, would be greatlt appreciated. Tom.
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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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May 8, 2014
We have a SQL 2012 server instance that has log shipping set up to another SQL 2012 server to provide a warm standby for a forward facing application. The databases on the primary server occasionally are required to be backed up and restored to a development environment, completely different server. Is there a way to schedule full backups with log shipping enabled?
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Aug 4, 2015
I am in plan to implement following for backup of one of our database Enable Full recovery mode
1- Create full backup nightly
2- Create transaction log backup after every 25 min
as I am taking full backup every night, I think I can remove transaction log file backups at the time of full backup, as we can apply transaction log backup over full backup.My question is regarding removal of transaction log backups.
-Should I remove all transaction log backups and then execute full backup?
-Should I execute full backup and remove all transaction log backup older than 24Hrs ?
-Do I have to consider SCN or related info before deleting any transaction log backup ?
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Oct 23, 2015
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:
Perform a transaction log backup on the server on Oct 23. I have never backup transaction log in the past. Restore the server with Oct 1 full backup with NORECOVERY option.Try to restore to the point at Oct 5 12:00, with the transaction log.
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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May 30, 2002
I have a backup regime where i take a full backup of my production database once a day and then 3 min log backups, I backup my msdb and master once a week.
I need to write a script to scroll through a given directory and restore the log backups in date/time order(with no restore) until the last file and then restore.
I know this is availible in the backup history but if my SQl box crashes and i cant get a uptodate master and msdb the backup history will not be uptodate to restore the database to it's current state.
Can anybody help with a script? or give me any pointers of how to read in filenames in SQL (please remenber i am a SQL virgin).
Thanks
Barry.
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Feb 6, 2000
SQL 7 SP1 NT 4.0 SP5
I created a backup plan for transaction logs only to run every 30 minutes. It works great for all databases except the Master and my main database scdb_v2.
The routine backups up the other 3 databases with no issue.
Why is this happening ?
Thanks,
Craig Somberg
mailto:csomberg@stageone.com
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Jan 20, 1999
Using SQL Server 6.5 and NT 4.0,..I'm trying to schedule a backup of a transaction log from one SQL Server
to another SQL Server both running NT 4.0. I keep getting:
dbsvolopen:Backup device t:ackup
emote.dat failed to open, operating system error =5 (Access denied)
I've checked every conceivable permissions entry on the target NT server and am now reading about the
different security modes for communicating between SQL Servers but I'm concerned that this may not be
where the problem really resides. Time is money.
Has anyone else configured a backup strategy where the database has a full backup to tape daily and the
transaction log is backed up every couple of hours, without truncatre, to disk, on another SQL Server?
Thanks in advance,
Doug
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Jan 14, 2002
The Transaction log backups that I do for the msdb and master databases ALWAYS fail. The full database backups always succeed. Are the master and msdb databases not supposed to have their transaction logs backed up? Jobs where configured thru the Database Maintenance wizard. Will the jobs fail if nothing has changed in either database? I am also confused by the fact that database and log backups for the model database ALWAYS work when I expect their to be little if none activity in that database.
Thanks in advance,
Riley
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Oct 5, 2004
Hi
We are running SQL Server 2000 and making full database backups using a maintenance plan. The transaction logs are being backed up via a separate plan.
However, the transaction log backups aren't purging but the database ones are. They are both run under the same id and both write to the same directory. Old text reports also get purged fine. I've got 'Delete older than 1 week' ticked for everything.
Can anyone think of anything else to check ?
Thanks
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May 23, 2006
New to Sql Server, running SQL Server 2000.Our transaction log file backups occasionally fail as the size of thetransaction log gets really huge. We'd like to schedule additionaltransaction log backups. Does that require an exclusive on the databaseor can the db be used during a transaction log backup?Also, does switching to a bulk mode recovery model before a bulkoperation then switching back to full recovery mode after present anyissues?Thanks in advance.
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Jan 10, 2008
Have a small shop and a maintenance plan that does a full backup on all user databases every night. I would have thought that a full backup (transaction log, too), would reduce the size of the transaction logs? Isn't that the point of a full backup? Mine seem to be growing larger. I do the shrink, rebuild indexes, backup the databse, backup the transaction log, clear history and folders older than 7 days. For example, the following db decreased only once during the period. But, note how the transaction log size continues to increases most of the time.
db, trn
253,196 - 394,245
253,193 - 365,695
253,191 - 360,572
254,219 - 381,699
254,223 - 406,346
254,223 - 411,018
Can someone explain this to me? Am I doing something wrong or just not understanding the process correctly?
Thanks,
Janet
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Feb 12, 2008
Hi,
On our SQL Server 2005 SP 2 i recently updated our Backup Plan.
I now make a Full backup every night, Differential backup every hour and Transaction log backup every 15 minutes.
This all works fine all the time except sometimes when the differential and transaction log backups want to run on the same time and then 1 of the 2 fails.
The error i get is code 0xC0010018. Error loading a task.
I made 1 Maintenance Plan with a subplan for each backup type (Full, differ....), so i can schedule them the way i want.
Searched the internet for an answer but i couldn't find it. The tasks only fail when the run simultaneous. Starting them manually always works.
Anybody has an idea what i need to do to get this working properly?
Thanks!!
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Oct 23, 2015
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:
1.Perform a transaction log backup on the server on Oct 23. I have never backup transaction log in the past.
2. Restore the server with Oct 1 full backup with NORECOVERY option.
3.Try to restore to the point at Oct 5 12:00, with the transaction log.
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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May 30, 2002
I want to backing up my hourly transaction log backups direct to a mass storage unit as opposed to the local server. However when trying to set this up it only gives me option of backing up to local drives, even though I have a drive mappping to the mass storage unit.. I'm there is a simple around this.Would appreciate any advice..many Thanks..
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Aug 1, 2000
We have a maintenance plan in SQL 7.0 that is performs a full backup each night and is supposed to perform tran log backups every two hours throughout each business day. For the most part, the first tran log backup after the full backup works fine, but the others fail.
Any ideas?
Thanks!
Ellen
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Nov 20, 2000
Does anyone know of a utility to read SQL 7 Transaction Log Backups and present them in a meaningful format?
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