Tran Log Backup Conflicts With Shrinkdatabase?

Apr 2, 2008

Hi:

I have maintenance plan on DBABC backup log to .trn job to run every 90 minutes (daily).

in order to keep the log file small, I also set up a job (T-SQL) to run at 4:15 am to backup log ABC with truncate_only, then run dbcc shrinkdatabase (DBABC, 10)

it looks "backup log ABC with truncate_only" has conflicts with the every90 minutes backup transaction log.

Question: could I keep the backup transaction log every90 minutes, but still could shrink the log file. The log file is growing very fast.

Or I have to use differential backup instead of backup tran log?

thanks
David

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How Can I Trigger Full Backup On Tran Log Backup Error?

Aug 8, 2007

Hello,
I have MS SQL 2005 server with 300+ databases on it. The application is set up that way that it creates a new database as needed (dynamically). Do not ask me why - I hate this design... So, it can create 3-4 databases a day (random time).
I've scheduled full backup of all databases to run once at night, and it runs just fine. Besides that, I have scheduled tran logs backup of all databases to run every hour. This backup fails from time to time with the following error:

Executing the query "BACKUP LOG [survey_p0886464_test] TO DISK = N'D:\backups\log backups\survey_p0886464_test_backup_200708072300.trn' WITH NOFORMAT, NOINIT, NAME = N'survey_p0886464_test_backup_20070807230002', SKIP, REWIND, NOUNLOAD, STATS = 10
" failed with the following error: "BACKUP LOG cannot be performed because there is no current database backup.
BACKUP LOG is terminating abnormally.". Possible failure reasons: Problems with the query, "ResultSet" property not set correctly, parameters not set correctly, or connection not established correctly.

So, I think what happens is since my full backup of all databases are scheduled to run only once at night, and tran logs every hour, when new database is created during the day, there is no full backup for it, that is why tran logs backup fails. Becuase after the failure, if I run full backup again, then tran log runs just fine afterwards.

I am new to MS SQL Server, I am mostly working with Sybase IQ. Do you know if I can "trigger" full backup every time when new database created to avoid tran lof failure?

Or is it possible to schedule full backup to run if tran log backup fails?
Any advice will be much appreciated.

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Apr 16, 2008



Hi

I have a full backup Job in SQL Server2000 server(designed by some body).

Step1.DBCC SHRINKDATABASE
Step2.DBCC SHRINKFILE -->It is shrinking log file
and
BACKUP DATASE()

Is it OK Shrinking Database and log files before full backup..

Your advice is appreciated.



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Jun 14, 2007

Hi:



I have 30 databases on sql server 2005 that I need to do a full backup every morning at 7:00 and tran log backup every 30 minutes until 7:00 PM. If I create a maintenance plan for a backup using the wizard I have the option of starting a full backup at 7 am and then an option of doing tran log backups every hour using a different schedule. I plan on selecting the option to create a different folder for every database. I just need to confirm that in this way the way to restore the data would be

1. to restore a full backup

2. apply all the tran logs depending on the time they want to recover back to.



I just think this is the easiest approach to have 30 databases on the same backup scheme instead of creating a separate backup device for each database and doing a full backup on that device and appending all tran logs to that device which means just 1 bak file versus the above strategy with a number of tran log files. Please advise.



Thanks



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Hi,

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I am kind of lost here as to how to proceed.

Please advise.

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Mar 28, 2002

I noticed our log files are getting way too big. I found that a previous
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BACKUP LOG DEV TO DevDailyTranLog with noinit

This runs every 20 minutes.

There's also a Maint Plan to do a Complete backup every night and a
Transaction Backup every hour (could be set to 20 min)

Why do you suppose the BACKUP LOG job exists ? If the maint plan were
set to backup transaction every 20 min, wouldn't the 2 jobs be
duplicating each other ?

Also, I notice that the Tran Logs specified in the database properties
seem awfully big (4 gig), shouldn't they automatically be truncated when
the daily full backup occurs ? (full recovery model)

Feel free to call me and straighten me out or to get more info.

Win2K, SQL 2K

gdunn@taunton.com
203-426-8171 x 374

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Running SQL Server 2005 Standard Edition.

Database is in Full Recovery mode.

I have full backups scheduled weekly, differentails scheduled daily and tran log ackups scheduled for every 15 minutes.

The tran log backups only work for the first 40 minutes or so after the daily backup. Once the daily has occured, the tran backups will work again, but for only 40 minutes.

I run consistency checks on the db daily and there are no errors.

The error returned from the tran log backup is 'BACKUP LOG cannot be performed because there is no current database backup'

Any thoughts would be appreciated.

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this is transact sql running in the back ground.
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This DOESNT WORK.

It works if I just try to delete only one of the things ie trn or bak files.

EXECUTE master.dbo.xp_delete_file 0,N'F:MSSQL.2MSSQLBackupibmdir',N'bak',N'2007-03-26T22:21:14',1

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Hi,

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Hi all,

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Code Snippet

DECLARE

@SQL VARCHAR(1024)

,@DBName VARCHAR(512)

SET @DBName= 'admin'

IF OBJECT_ID('tempdb.dbo.#ShrinkDB') IS NOT NULL

DROP TABLE #ShrinkDB

CREATE TABLE #ShrinkDB

(

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,FileID INT

,CurrentSize BIGINT

,MinimumSize BIGINT

,UsedPages BIGINT

,EstimatedPages BIGINT

)

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'

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'

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