Full Back Up ( Transaction Log ) Vs ( Incremental Backup)
Feb 1, 2001
hi, I would like to know the correct reaction for a crash in both senarios.
First senario,
I made a full back up at 6 am , then scheduled sql server to make transaction log back up every 2 hours (8,10,12,2 pm,4,6,8) . If I have a crash at 12:30. How would I resotre the data in the first senario....Can I restore the full back up done at 6 am then restore the last transaction log backup ( which is 12 Noon ) . I am not sure If I need to resotre the whole tran from 6 am till the time it was crashed.
Second senario,
I made a full back up at 6 am, then scheduled sql server to make Incremental backup every 2 hours (8,10,12,2 pm,4,6,8) . If I have a crash at 3:00 pm. How would I resotre the data in the second senario. ....Do I restore the full backup at 6 am then restore each incremental backup backwords ( 2,12,10,8)
AS you can see, I am not sure how to deal with this issue, I do appreciate your feedback.
Best regards
Ahmed
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Feb 1, 2001
hi, I would like to know the correct reaction for a crash in both senarios.
First senario,
I made a full back up at 6 am , then scheduled sql server to make transaction log back up every 2 hours (8,10,12,2 pm,4,6,8) . If I have a crash at 12:30. How would I resotre the data in the first senario....Can I restore the full back up done at 6 am then restore the last transaction log backup ( which is 12 Noon ) . I am not sure If I need to resotre the whole tran from 6 am till the time it was crashed.
Second senario,
I made a full back up at 6 am, then scheduled sql server to make Incremental backup every 2 hours (8,10,12,2 pm,4,6,8) . If I have a crash at 3:00 pm. How would I resotre the data in the second senario. ....Do I restore the full backup at 6 am then restore each incremental backup backwords ( 2,12,10,8)
AS you can see, I am not sure how to deal with this issue, I do appreciate your feedback.
Best regards
Ahmed
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Jun 14, 2007
1) We are doing Weekly Full & DAILY night incremental backup of TL using Veritas Backup Manager to Tape.
One day I took Incremental Backup of TL file manually using studio and deleted the backup file.
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 ?
What is the recommendation ? If automated backup is enabled, we should not do manual backup ?
2) In Full Recovery Modek , If I do full backup , Does it backup Transactional Log also or only Datafiles ?
Thanks
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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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Mar 4, 2011
We had a siutation last night in our production environment that forced us to revert back to an earlier version of the database (before a major code rollout that failed). After restoring the days full backup (with NORECOVERY), and then restoring a DIFF backup (FULL RECOVERY and had checked Preserve Replication Settings)...the transaction replication failed.
Message #1
The replication agent has been successfully started. See the Replication Monitor for more information.
Message #2
2011-03-04 15:07:17.566 Copyright (c) 2008 Microsoft Corporation
2011-03-04 15:07:17.566 Microsoft SQL Server Replication Agent: logread
2011-03-04 15:07:17.566
2011-03-04 15:07:17.566 The timestamps prepended to the output lines are expressed in terms of UTC time.
2011-03-04 15:07:17.566 User-specified agent parameter values:
[code]....
I've tried reinitializing the publication/subscription and while that took brand new snapshots and copied it over to the replicated data server, it did not fix the problem.I read from a different post that I could try running "sp_replrestart" but that ran for about a half an hour and didn't appear to do anything but fill up our log files...did I not wait long enough?
The only thing I know to do at this point is to drop the publication on the production server and rebuild it completely (and with all the tables we're replicating that would take quite a bit of time.
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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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Apr 30, 2008
Please correct me if I am wrong with this:
I am using SQL Server 2000, when I do a backup I use the database maintenance plan at enterprise manager. I select my database and then I schedule the complete backup and transaction log backup to "everyday at 22:00:00"
My question is, do I really need to do the transaction log backup? If I am not wrong with the complete backup I can already recover all my data, the transaction log backup is useless if done at the same time that I do the complete backup, right?
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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
DB1_Sat.bak
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"
Is my database complete if I restore only "DB1_Mon.bak" plus the "DB1_Sun.trn"?
Jeboy
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Apr 30, 2008
Please correct me if I am wrong with this:
I am using SQL Server 2000, when I do a backup I use the database maintenance plan at enterprise manager. I select my database and then I schedule the complete backup and transaction log backup to "everyday at 22:00:00"
My question is, do I really need to do the transaction log backup? If I am not wrong with the complete backup I can already recover all my data, the transaction log backup is useless if done at the same time that I do the complete backup, right?
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Oct 14, 2007
Hi, I am reading the book of MCTS Self-Pace Training Kit. If I set up the option of Recovery Model in the properties of a database, Does SQL Sever will generate/update the log file per transaction? What is the relationship between Transaction Log files and Recovery? When we want to recover a database, we can use the database's backup. Why we need to keep Transaction Log?
Sincerely,
Julian
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Jul 12, 2007
In MS SQL 2005 when you do a Full Backup does it also backup andtruncate the transaction logs or do I need to back the transactionlogs up separately?Thanks.Brian
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Feb 4, 2008
Hi all
Iam working in Prodcution ENV,Please help how make space
The log file for database 'Home_alone' is full. Back up the transaction log for the database to free up some log space.
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Mar 1, 2006
My Question is of understanding Incremental Backup. How does this work,
Does it go by new files added or activate on file size.
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Jun 25, 2002
Does an Differential Backup contain all the changes since the last full backup, including Inserts, Updates, and Deletions. Our DB has "Truncate on Checkpoint" = True, so Log backups are non-sensical. I want to apply the Differentials to an archive, offline DB.
"one pebble does not fill the void, but it is a start."
"Dedicated to only creating original mistakes."
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Apr 11, 2007
Hi,
I am working on one application, which retrieves data from multiple tables in the database and all the fields retrieved, are exported as an excel sheet. All the export functionality is done through DTS. And the data is retrieved using an SP.
I am supposed to use an "incremental backup" approach here. Means, for the 1st scheduling of the package, all the database dump will be there in excel file. But, after that only fields that are updated/inserted are to be filled in the excel file. Each time, when the dump of the database is taken, the excel file is stored in an archive folder with Date and tiemstamp(e.g. TEST_11_04_2007_15_00_00.xls)
e.g. For the first dump, I get 100 records from the database. Before next execution of the package, 10 rows get inserted and 1 row gets updated. So, on the second time execution of the package, I should populate the excel sheet with those 11 rows only, and not 110 records.
I am not authorised to change the database schema.
So, is there any approach to try out this?
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Apr 11, 2007
Hi,I am working on one application, which retrieves data from multiple tables in the database and all the fields retrieved, are exported as an excel sheet. All the export functionality is done through DTS. And the data is retrieved using an SP.I am supposed to use an "incremental backup" approach here. Means, for the 1st scheduling of the package, all the database dump will be there in excel file. But, after that only fields that are updated/inserted are to be filled in the excel file. Each time, when the dump of the database is taken, the excel file is stored in an archive folder with Date and tiemstamp(e.g. TEST_11_04_2007_15_00_00.xls)e.g. For the first dump, I get 100 records from the database. Before next execution of the package, 10 rows get inserted and 1 row gets updated. So, on the second time execution of the package, I should populate the excel sheet with those 11 rows only, and not 110 records.I am not authorised to change the database schema.So, is there any approach to try out this?
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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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Aug 3, 2015
Need to restore database,here's the scenario:
Data got deleted on Friday evening, need to have database restored to FRiday afternoon and also some data has been entered on Monday, which needs to be there.
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Sep 14, 2000
SQL7: After doing a full backup Enterprise
Admin still shows "Transaction log space"
in use. Isn't it that way that full backup
releases all space formerly used by
log files?
Greetings from Mannheim, Germany
Ricardo
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Jul 8, 2015
We are having full backup every day and hourly transactional log backups during the working hours in our production server which is running sql server2008 R2 as a clustered instance. For the Db's under simple recovery model we are having full backups. Now we want to implement transaction log shipping to a remote server in another site. I understand that log shipping involves the restoration of a full backup initially in the remote server and then restoring the transactional log backups which are shipped to it ,on a no recovery basis.
My question is whether we can continue taking the full backups every day in the production sever which is given for offsite storage. Will the full backups taken in the primary server, after the log shipping has been implemented, affect the log backups which are restored into the remote server. Will the chain of log backups which are restored into the secondary server be affected in any manner if a full backup is taken in the primary?
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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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Jan 18, 2006
Does anyone know what the commands would be? I am trying to create a job that puts a DB in simple mode then launches a reorg and re-index, then sets it back to full when it is complete. This way I can eliminate large transaction logs being created.
Any help would be great!
Thanks
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Oct 28, 2006
Can anyone explaing briefly, why would this error appears???
Thank you
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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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Feb 8, 2001
Hi all,
I'm getting the following error message in NT event view:
Error: 9002, Severity: 17, State: 2
The log file for database 'db_sys' is full. Back up the transaction log for the database to free up some log space.
But I don't know how to back up the transaction log for the database.
Do I need TRUNCTE LOG (in E.M) to free up some log space?
I only know back up all the database using ALL TASKS -> BACKUP DATABASE in E.M. Please help me. Thanks in advance.
TH
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Mar 19, 2007
I have a stored procedure that calls another stored procedure with thefirst stored procedure opening a transaction:BEGINSET XACT_ABORT ONBEGIN TRANSACTIONdoes various updates/insertscalls 2nd stored procedure to proccess updates/inserts common to manyother stored proceduresdoes more various updates/insertscommitENDThe problem I'm having is that within the 2nd stored procedure is thatif it encounters an error, it does not roll back the entiretransaction and I finish up with missing records in the database. Amusing this in the 2nd stored procedure:if(@TypeId1 = @TypeId2 and @Line1 <'' and @Line2 <'')beginRAISERROR('error message', 16, 1)RETURNendWhat could the problem be? From what I've read, it seems as thoughyou can't have an open transaction within one sp that calls another spand it maintains the same transactoin? Is this corrrect?I tired the following too, and I still couldn't get it to work. Anyideas anyone?************ sp 1 ***********Declare @AddressError char(3)SET XACT_ABORT ONBEGIN TRANSACTIONexec Sp2@AddressError OUTPUT,@variable1,@variable2,etc. etc************** sp 2 *****************@AddressError char(3) OUTPUT,if(@TypeId1 = @TypeId2 and @Line1 <'' and @Line2 <'')beginRAISERROR('error message', 16, 1)RETURNendSET XACT_ABORT ONBEGIN TRANSACTIONprocess updates/insertsSet @AddressError = 'no'Commit******** back to sp 1************If @AddressError <'no'BEGINrollback transactionENDcontinue doing updates/insertscommit
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Jun 16, 2007
Hi,
I have a case where I read from SQL Server DB and write to a flat file.
I have one Data Flow Task inside which I have a OLEDB source component that feeds rows to a script component that writes to a flat file. I have set the txn attributes for the container to "Required" and "Read committed" . But I find that rows are written to flat file even when I throw an exception from my script component. Question is how do I prevent rows from being written to the flat file if error/exception happens. I want the whole process to be in a single transaction.
Thanks
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Feb 28, 2008
Hello, I do not know how to implement transaction roll back in asp.net application. I am using SqlHelper class to communicate with my sql db.Thanks, junior
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Apr 9, 2008
Ive got an insert statement that fails, and below that I have code like the following:
IF @@ERROR <> 0
BEGIN
-- Roll back the transaction
ROLLBACK
-- Raise an error and return
RAISERROR ('Error INSERT INTO Address.', 16, 1)
print 'test was here'
RETURN
END
However, there is now rollback and the inserts below it are going through.
what do i have wrong ?
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Apr 3, 2015
The following transaction runs, then reverts back after 10 mins.
begin Tran [UpdateSundays]
update ScanAssetInformation with (rowlock)
set BusinessDate = dateadd(day,-2,BusinessDate)
where datepart(weekday,BusinessDate) = 1
commit tran [UpdateSundays]
begin Tran [UpdateSaturdays]
update ScanAssetInformation with (rowlock)
set BusinessDate = dateadd(day,-1,BusinessDate)
where datepart(weekday,BusinessDate) = 7
commit tran [UpdateSaturdays]
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