Log Truncation Vs Transaction Backup
Jun 13, 2001If we choose "truncate log on checkpoint", then we cannot backup the transaction. May someone tell me what's the difference between them and the advantage over the the other.
Thanks.
yatie
ADVERTISEMENT
Transaction Log Truncation
Sep 6, 2007
I have always assumed that when you backup a SQL Server database the transaction log is automatically truncated so that there is no need to explictly truncate it. It makes sense to me, you would not normally need logs from before the most recent backup. BOL, with all its talk about check points etc, seems to hint at this but I can't find an explicit statement to this effect.
Anyone?
Dick Campbell
Truncation Of Transaction Logs Using SSIS
Feb 8, 2008
HI,
What I have set out to do is to try and truncate the transaction logs on my server instances after a nightly backup. I went ahead and used the shrink database option in the maintenance plan wizard. Unfortunately I have found this will only truncate the logs for databases using the simple database recovery model, and I wish to truncate the whole lot to save space...
I went ahead and put together an SSIS package that does the following:
1. First thing I do is build a fresh copy of a database listing in a temp table using the following SQL statement
USE Master;
Go
SELECT name, DATABASEPROPERTYEX(name, 'Recovery') AS RecoveryModel, DATABASEPROPERTYEX(name, 'Status') AS DBStatus INTO TempTables.dbo.Recovery FROM sysdatabases ORDER BY name
GO
2. Next I read this dataset back into memory using a SQL statement as follows:
USE TempTables
GO
Select name from dbo.recovery Where name <> 'master' and name <> 'model' and name <> 'msdb' and name <> 'tempdb'
I map the results to a results set called User::TableName (which is of an object data type)
3. Next the package goes to a ForEach Loop container and I use the Foreach ADO Enumerator Enumerator to read the data I just selected into the look. I select the User::TableName variable and use the enumeration mode 'Rows in first table'. I have used a variable mapping of Variable: User::TableName with an Index 0.
4. I then use the following SQL statement (which sits in the For Each Loop) to try and alter the recovery model:
ALTER DATABASE @TableName
SET RECOVERY SIMPLE;
GO
This is where the package falls over with the following error message
SSIS package "mnt_TransLog.dtsx" starting.
Error: 0x0 at Simple Mode: Incorrect syntax near '@TableName'.
Error: 0xC002F210 at Simple Mode, Execute SQL Task: Executing the query "ALTER DATABASE @TableName
SET RECOVERY SIMPLE;
" failed with the following error: "'RECOVERY' is not a recognized SET option.". Possible failure reasons: Problems with the query, "ResultSet" property not set correctly, parameters not set correctly, or connection not established correctly.
Task failed: Simple Mode
Warning: 0x80019002 at For Each Table Set to Simple: SSIS Warning Code DTS_W_MAXIMUMERRORCOUNTREACHED. The Execution method succeeded, but the number of errors raised (2) reached the maximum allowed (1); resulting in failure. This occurs when the number of errors reaches the number specified in MaximumErrorCount. Change the MaximumErrorCount or fix the errors.
Warning: 0x80019002 at mnt_TransLog: SSIS Warning Code DTS_W_MAXIMUMERRORCOUNTREACHED. The Execution method succeeded, but the number of errors raised (2) reached the maximum allowed (1); resulting in failure. This occurs when the number of errors reaches the number specified in MaximumErrorCount. Change the MaximumErrorCount or fix the errors.
SSIS package "mnt_TransLog.dtsx" finished: Failure.
I think the problem here is either I am not passing the variable across correctly (i.e. not declaring it or something..!) or I am passing the wrong type of variable across.
Once the recovery model is changed I can truncate the transaction logs successfully but I can€™t seem to until this is done! Any help in finding a solution to this problem or a better way of approaching this problem would be appreciated!
Thanks
Marek Kluczynski
Management Information Officer
Investors in People UK
7-10 Chandos Street
London
W1G 9DQ
Tel: 020 7467 1956
Backup, Truncation, Behavior
Mar 22, 2005Scenario:
I have a database in SQL Server 2000 with 90gb of data. It is growing every day with a some millions records. In order to get superior performance I rebuild the indexes every night. The job takes about 1.5 hours, and sometimes causes to the log file to grow to 30-40 gigs. I do a backup of the log files every 20 minutes, and this causes an log truncation to happen automatically (according to the MS documention).
Problem:
The log files makes the disk goes full. I cannot insert new disks at this point.
Question:
When rebuilding the indexes takes 1.5 hours, and I do a log backup (which also does a truncation) every 20 minutes, will the log backup ever get to do something with the transaction log while its still working on a transaction (doing the rebuild of index)?
Observation:
It seems like the 20 minute log backup is of no help because I see the log files grows so big.
BR
Henrik
Norway
Data Truncation Does Not Trigger Truncation Error - Why?
Jun 27, 2007Hi,
I have a data file that has numeric data that looks like:
1.123456
And this column is defined as a DT_NUMERIC(18.6) in the flat file conn mgr.
As an experiment, I changed the destination column to a NUMERIC(18,0) - hoping that this would throw a truncation error at the flat file task level (where I have Truncation on all columns set to "fail component").
Not a peep. It loaded the data into the table, chopping off the 6 digits after the decimal point.
You would THINK that this would cause an error, but no. Why is this? The flat file task complains about all kinds of things, but this is such a gross error, you would think it would catch it!
Thanks
SQL Security :: Full Backup Needed After Restoration Of Database Before Transaction Log Backup
Jul 15, 2015We 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?
View 5 Replies View RelatedShould Full Backup And Transaction Backup Be From One Plan?
Mar 11, 2008Hello, 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
What Is The Differences Between A Differential Backup And Transaction Log Backup??
Jun 13, 2007what is the differences between a differenctial backup and transaction log backup?
View 1 Replies View RelatedIs It Possible To Restore From A Database Backup Without A Transaction Log Backup?
Oct 14, 2007I neglected to backup the transaction log as part of the process of backing up the database. Now i only have the backup file for the database and no transaction log backup. When i try to do a restore on the database, i get the error on a "tail log missing" message (which i'm assuming is that it's looking for the t-log backup?).
Is it possible to restore or even restore to a new database? I'm only looking to retreive data from 2 tables within the backup file.
Thanks!
SQL Server 2005 on Windows 2003 Server x64.
Transaction Log Backup
Apr 11, 2001Hi
I have a full backup and transaction log backup strategy for my test server.
My transaction log backup is failing as some user must have run some nonlogged operation. Is there any way to find out what is causing transaction log backup to fail?
Any hint would be appreciated.
Transaction Log Backup
Sep 18, 2001I have a problem w/ my Transaction Log Backup. The backup files continues to grow and grow and grow. I have created a new Transaction Log backup through EM, but instead of appending each backup to the existing backup file, I overwrite the existing backup file. My gut feeling is that this is not right. If it isn't, then how can I continue to backup my TL's w/o having the file growing at an astronomical pace?
I would appreciate your help
Chris
Backup Transaction Log
Feb 9, 2001Is there a possibility to recover a database up to the point of failure ?
I have a database with a primary datafile and a transaction logfile.
I have backup of the database and transaction log backups upto an hour before failure. But I also want to recover one hour data which is in the transaction log.
I have lost my primary datafile.
Is there a way to recover ?
How do I backup the transaction log before starting restore ?
Thanks,
Bala
Transaction Log Backup
Feb 2, 2001Hi friends,
I have set up the Transaction Log backup on one server he was running fine for few hour later he failed for two times and then after full backup it is running fine.
Can any one of shed some light on this issue.
Error:
Cannot allow BACKUP LOG because file 'ZTVData' has been subjected to nonlogged updates and cannot be rolled forward. Perform a full database, or differential database, backup. [SQLSTATE 42000] (Error 4213) Backup or restore operation terminating abnormally. [SQLSTATE 42000] (Error 3013). The step failed.
Thank You,
Paul T
Transaction Log Backup
Aug 26, 1999Hi!
Does the command,
backup log <database name> to <backup device name>
clear the inactive portions of the transaction log?
Praveena
Transaction Log Backup
Jun 9, 1999I've set up 4 database maintenance plans for my databases. 1 for all system databases, and the other three for specific databases. they back up to a network drive on another computer.
The plans are set up to do complete backups every day and then transaction log backups every 15 minutes.
The complete backups work fine. They all create the backups on the network drive. The transaction log backups are only created for one of the databases though. All the others report "successful completion" but they don't actually create the backup file. I looked at the report created and it never has a step that backs up the transaction log. I compared the T-SQL code from the one transaction backup job that works to one that doesn't and all the commands are exactly the same (aside from different directories to save in to, job numbers, etc).
Does anyone have any idea what is going on? I've deleted the maintenance plans and recreated them to no avail. I've also created an on the side differential backup that works as well.
Any help would be appreciated
Bob
Transaction Log Backup
Feb 21, 2001I am using ArcserveIT 2000 SQL Agent to backup my SQL Server 7.0 db. I perform a full backup (with archive on) every day. ArcserveIT backsup both database and transaction log files. 'Truncate log on chkpt' is set to False in the databases. If I don't use SQL server's backup command with trunc. log on chkpt to true, will the transaction log file ever get trimmed? Does a third party backup utility like ArcserveIT will do something similar to 'backup command' in SQL server 7.
Anyone using ArcserveIT SQL Server 7.0 Agent, please comment.
Thanks
Transaction Log Backup
Mar 15, 2004Good afternoon,
Has anyone ever had an issue with a Transaction Log being backed up but not truncating? We’ve been having trouble with this and now have to truncate the log manually. Any information at this point will be useful. Thank you.
When & How To Take Transaction Log Backup.
Oct 3, 2001Hi,
Can anybody help me in,
When to take backup of transaction log and how to schedule it?
My database is in Full recovery mode with two log files.
I am doing mass insertion, then i am getting the following error
"The log file for database 'nags' is full. Back up the transaction log for the database to free up some log space."
I have taken backup of transaction log. now also it is giving the same error.
Any suggestions how to handle to this situation, to prevent the above error.
Thanks in advance.
Nageswararao.
Backup Transaction Log
May 11, 2007What is the proper way to backup a transaction log for a database whose name contains a space. (I.E. DBname = Database Name). I am trying to execute a command, but it does not like the space in the database name. I have also tried wrapping the name in single quotes and parethesis to no avail.
View 2 Replies View RelatedTransaction Log Backup
May 29, 2008How often do you guys back up your trans logs, every 10mins, 30mins or hourly???
Just curious
Transaction Log Backup
Mar 22, 2004We have a couple of databases in same server, and I set up the job on SQL server agent for backup transactions, a few dbs log backup successful, but a few are always failed, no error message be given, only can check the report --- "Backup can not be performed on database 'Agrdev'. This sub task is ignored ....," I checked all db property and set up , couldn't find out what's going on. Did anyone can help me?
View 8 Replies View RelatedBackup Transaction Log
May 11, 2004Hi,
I have error when i backup the transaction log of master and msdb database.
I think there is an error because the model of this database is simple.
can i modify the model and write full ?
I have another question,
I have a db with 1 db file of 11Go, i have to create secondary files or not.
Transaction Log Backup
Mar 25, 2008Hi,
If i have enabled truncate log on checkpoint option then --
1. Can i take transaction log backup?
2. Can i use point-in-time recovery for the Datbase.
can somebody help me on this. please explain the concept also.
Thanks in advance.
-- Chetan
Backup Of Transaction Log
Jun 13, 2006How to schedule backup of transaction log???
View 2 Replies View RelatedHELP! Transaction Log Backup!
Jul 20, 2005Hello!!I am relatively new to SQL and am having a problem. I have taken overa SQL 2000 db that did not have any backup plans scheduled for it. Icreated a maintenance plan that backs up the database every night andanother plan that backs up the system databases once a week. I ranboth these jobs successfully, but when I created a third plan tobackup the transaction log it fails with the following message:Executed as user: NT AUTHORITYSYSTEM. sqlmaint.exe failed. [SQLSTATE42000] (Error 22029). The step failed. I then executed the followingstatement: sp_grantlogin 'NT AuthoritySystem' which did not work.I still do not understand why I can't backup the log? The databasebacks up fine with no errors so it can't be a permission thing and Icreated the job with a maintenance plan so it has to be in fullrecovery mode. Right? How do I tell? Thank you for all yourresponses!!NS
View 9 Replies View RelatedBackup Transaction Log
Jan 4, 2008Thanks a lot for all the replies.
I'm trying to set up a job to do transaction log backup. I used the maintainence plan to create the job. the code is quite long and not very straight forward, I do not even see the BACKUP LOG .. command. Do people usually use maintainence plan for this purpose or they write their own script and then create the job?
Ping
Transaction Log Backup
Nov 16, 2007Hi,
I have one doubt about Transaction backup. I want to take backup of highly growing database. I will take full backup every 3 days, differential backup every 1 day and transaction backup every 6 hours.
Now my question is-
When I take a transaction backup do it take backup of all transactions which are currently in progress and not committed in database?
OR What are the chances of loosing transactions which are currently running on system while I take a backup?
Thanks in advance.
Problems With Transaction Log Backup
Jul 9, 2002We are experiencing problems with our transaction log backup. The follow error appears when we attempt the backup.
"Backup, CHECKALOC, bulk copy, SELECT INTO, and file manipulation (such as CREATE FILE) operations on a datbase must be serialized. Reissue the statement after the current backup, CHECKALLOC or the file manipulation operation is completed."
We turned on "Truncate Log on Checkpoint" and created an online backup. Then we turned off "Truncate Log on Checkpoint" and manually saved the transaction log to tape. We thought all was well until the scheduled job to backup the transaction log to tape brought back the same error.
Any suggestions? Thank you!!
Transaction Log Backup Failures
Dec 29, 2000We have a job created by the maintenance job wizard that backs up the transaction logs for all of our databases on an hourly basis. At random intervals, one of the tranaction log backups will fail with the following message in the job history:
sqlmaint.exe failed. [SQLSTATE 42000] (Error 22029). The step failed.
The next scheduled transaction log backup will run fine the next hour. The sqlmaint.exe is present and executable. There are no additional messages in the SQL Server error log or SQL Agent error log. Any ideas what causes this random failure?
Transaction Log Backup Failure
Aug 4, 2000I seem to have a problem with my SQL Server log backup system. First I was receiving alerts that the log file was filling up, so I increased it from 3Mb to 150Mb, but then I got another alert saying the same thing, later on I got an alert saying that the log backup had failed. I then decided to truncate the log and do a full backup after as suggested, however this did not work, I don't know if I am doing something wrong, this is really confusing and frustrating.
View 1 Replies View RelatedTransaction Log Backup Failure
Aug 15, 1999I have scheduled transaction log backups to occur every 15 minutes with database backups every sunday at 1.00AM and differential db backups every day at 1.30AM.
While viewing the job history of the transaction log backups through enterprise manager, I noticed that one transaction log backup had failed at 1.00AM on sunday. The error message was,
"Backup, CHECKALLOC, bulk copy, SELECT INTO, and file manipulation (such as CREATE FILE) operations on a database must be serialized. Reissue the statement after the current backup, CHECKALLOC, or file manipulation operation is completed. [SQLSTATE 42000] (Error 3023) Backup or restore operation terminating abnormally. [SQLSTATE 42000] (Error 3013). The step failed. "
Please let me know what the error message implies. Will there be any problem if the transaction log backup takes place at the same time as the full database backup or diff. db backup?
Thankyou.
Praveena
Urgent....Transaction Log Backup
Feb 7, 2000Hi,
What do I do if transaction log is full ?????
Can I automate the truncation of the transaction log????
Bindu
Transaction Log Backup Fails
May 7, 2001My transaction log backup is failing with the following error:
Does anyone know how I can fix it?
(null)
Microsoft (R) SQLMaint Utility (Unicode), Version 8.00.194 Copyright (C) Microsoft Corporation
(null)
Logged on to SQL Server as 'NT AUTHORITYSYSTEM' (trusted) Starting maintenance plan 'Maint Plan - TLogs' on 5/7/2001 8:18:11 AM Backup can not be performed on database. This sub task is ignored. (null)
Thanks