Trasnaction Log Started Stays Block By Full Backup For 2 Hrs
Mar 18, 2003
Hello everybody..
I have 40 GB database with following
backup plan
1. transaction log backup every 15 min
2. full backup on disk once every day
Scenario
Full backup started at 2 AM
transaction log started at 2:15 AM
Full backup complited at 4 AM
transaction log backup
complited at 4:03 AM
Here is my questions
Up to what point of time I will have
transaction log ?
When I use sp_who2 I can see that transaction log backup blocked by full backup process
thank you
Alex
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Oct 19, 2007
Hi,
I have scheduled full backup daily at morning 6:00. It was running fine till yesterday. Suddenly today morning it failed giving following error....
I have executed maintenance plan manually and again it gave same error....
10/19/2007 11:03:10,FullDBBackup.Subplan_1,Error,1,*****,FullDBBackup.Subplan_1,Subplan_1,,Executed as user: ****SYSTEM. ...9.00.3042.00 for 32-bit Copyright (C) Microsoft Corp 1984-2005. All rights reserved. Started: 11:03:10 AM Error: 2007-10-19 11:03:10.98 Code: 0xC0010018 Source: Back Up Database (Full) Description: Error loading a task. The contact information for the task is "Back Up Database Task; Microsoft Corporation; Microsoft SQL Server v9; ? 2004 Microsoft Corporation; All Rights Reserved;http://www.microsoft.com/sql/support/default.asp;1". This happens when loading a task fails. End Error Error: 2007-10-19 11:03:11.25 Code: 0xC00291EC Source: {C7FB73D1-ADF1-42C0-B3D5-9F8014CC206B} Execute SQL Task Description: Failed to acquire connection "Local server connection". Connection may not be configured correctly or you may not have the right permissions on this connection. End Error Warning: 2007-10-19 11:03:11.25 Code: 0x80019002 Source: OnPreExecute Description: SSIS Warning Code DT... The package execution fa... The step failed.,00:00:01,0,0,,,,0
Pls help me as daily backups are very crucial to me...
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Feb 19, 2015
Using Ola Hallengren's scripts I do a full backup of a database on a Sunday. Then differential backups every 6 hours and log backups every hour. I would like to keep a full week of backups based off the full backup done on Sunday. Is there a way for me to clear out the diff and log folders after the successful full backup on Sunday nights?
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Jul 15, 2015
We take a full backup in the early morning and hourly transaction log back during the working hours for one database in the production server. The application team made certain changes to the design of the said database in their development server. The backup from the development server was restored to the production server during working hours. After the restoration should we take a full backup before next transactional logbackup? Would the transactional log backup with out a full backup after the restoration of a database be valid?
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Dec 3, 2014
I have the following stored procedure to test scope of variables
alter proc updatePrereq
@pcntr int,
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begin
[Code] ....
In the above script @i is declare in the if block only when the @pcntr value is 1. Assume the above stored procedure is called 5 times from this script
declare @z int
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declare @max int
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Nov 16, 2015
I have a database that is just over 1.5GB and the Full backup that is 13GB not sure how this is since we have compression on for full backups and my other full backups are much smaller than there respective databases...Now my full backup is taken every Sunday night and the differentials are taken every 6 hours after the full backup. Now I have been thrown into this DBA role with little to no experience just what I have picked up and read. So my understanding of backups are limited but what I think I understand is that we take a full backup and the differential only captures what changes in the database so my question is why is my database 1.5GB but my differential is 15.4GB? I have others database that are on the same instance and don't seem to have this problem. I also just noticed that we do not rebuild the index before a full backup like we do on other instances...
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Nov 29, 2007
If my backup starts at 8PM and take 1 hour to complete, will the changes made to the database during that hour be captured in the full backup?
Stated another way, will my backup be a snapshot of:
a) 8PM when the backup started
b) 8PM with some of the changes made between the hour
c) 9PM when the backup finished?
Anybody know the exact way SQL Server handles that logic?
Thanks,
Marc
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Jul 19, 2007
Hi
I am using the Simple recovery model and I'm taking a weekly full backup each Monday morning with differentials taken every 4 hours during the day.
On Wednesday afternoon, a programmer ran a process that corrupted the db and I had to restore to the most recent differential. It was 5pm in the afternoon and a differential backup had just occured at 4pm. No problem, I figured.
I restored the full backup from Monday morning and tried to restore the most recent differential backup. The differential restore failed. Since I had used T-SQL for the initial attempt, I tried using Enterprise Manager to try again.
When viewing the backup history, I see my initial full backup taken on Monday plus all the differentials. BUT, on closer inspection, I noticed another full backup in the backup history that was taken early Tuesday morning. I can't figure out where this Tuesday morning full backup came from. It wasn't taken by me (or scheduled by me) and I'm the only one with access to the server. My full backups are usually named something like HCMPRP_20070718_FULL.bak. This erroneous full backup was named something like HCMPRP_03a_361adk2k_dd53.bak. It seemed like it was a system generated name. Not something I would choose. To top it off, I could not find this backup file anywhere on the server and when I tried to restore using this full backup, it failed.
Does anyone have any clues as to where this full backup might come from? Does SQL Server trigger a full backup on its own if some threshold is reached?
I ended up having to restore using the differential taken just before this erroneous full backup and lost a day of transactions.
Any insight is greatly appreciated.
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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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Oct 17, 2006
I have a full backup and several diff backup,now i want to restore
firstly,I restore full backup
RESTORE DATABASE ***
FROM DISK = 'D:databackup200610140000.bak'
WITH NORECOVERY
GO
it's working,then i don;'t know how to continue
Thanks in advance
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Mar 11, 2008
Hello, everyone:
I just heard that for restore purpose, ths full backup and transaction log backup should be from one maintenance plan. Otherwise transaction log backup files cannot be restored after restoring full backup files.
Is it true? Can anyone offer official documents?
In my system, full and transaction backups are from one maintenance plan. Restores are doing fine. I am not sure that ideal is true or not.
Thanks
ZYT
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Mar 15, 2007
If I create an adhoc db backup that takes, say 30 miuntes to complete, should I suspend the tran log backups that run every 10 minutes, until the full backup is complete?
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Jun 6, 2007
Hi,
Using SQL Server 2005, we have a 2.8Gb database under the Simple recovery model. The database contains ~50M rows and each night ~60k rows are loaded(appended) to the database by a SSIS task.
We configured a Maintenance Plan which is executed once a week to perform a full backup of the database. The resulting backup file is ~2.8Gb, as expected.
We also configured another Maintenance Plan which is executed every day, a few hours after the SSIS task is executed, to perform a differential backup. To our surprise, the resulting backup file is about the same size as the full backup, ~2.8Gb when it should only be a few MB (only 60k rows are added to the database)
When we launch the "Restore Database" wizzard we clearly see the different backup set, Full and Differential but they all have about the same size (same for the physical backup file on disk).
Is there anything we are missing, why are the differential backup that big?
Thanks for any advice.
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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.
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Mar 10, 2008
I have this database "DB1" which is in FULL recovery mode.
I run full daily backup -Monday to Saturday
DB1_Mon.bak
DB1_Tue.bak
DB1_Wed.bak
DB1_Thur.bak
DB1_Fri.bak
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Come Sunday - for the first time I have run transaction log backup.
DB1_Sun.trn
And now, I need to restore DB1 - but the only full backup that I have is the Monday - "DB1_Mon.bak"
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Jun 10, 2006
Hi MVPS/MS Experts:
Pardon me and my ignorance for asking this question. I just want to understand the backup architecture more clearly. According to BOL (both in SQL 2k and SQL 2k5) in simple recovery mode trasaction log backup is not possible since the log is truncated on checkpoint which is true. Also we know that FULL backup backups both the db and transaction log as well.
My question is what happens when a database is in simple recovery mode and a full backup is done. since the tran log cannot be backed up does only the db backup is done when a full backup is done?. What exactly happens behind the scenarios?. Is it that only the active log gets backed up when a full backup is done in simple recovery mode?. I am trying to understand how a full backup in simple recovery mode behaves without contradicting the full backup architecture and that the veracity of the statement (both db and tran log backup in full backup mode) holds true for a simple recovery scenario.
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1) We are doing Weekly Full & DAILY night incremental backup of TL using Veritas Backup Manager to Tape.
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Will I able to restore completed if something happens on next day ? Is automated backup takes care of Incremental backup from last night instead of manual interim backup ?
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