I am doing a differential backup every night with t-log backups every 15 mins. The differential backup occurs at 3:00a and is about 300 MB. The very next t-log backup at 3:15a is also about 300 MB instead of the usual 1 - 2 MB. Why is this and how can I avoid it? Is this just how SQL Server works? Do I have to do a full backup every night instead? Thanks in advance for your help.
- Michael
what is the differences between a differenctial backup and transaction log backup?
View 1 Replies View RelatedUsing 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?
View 2 Replies View RelatedI 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...
View 13 Replies View RelatedHi
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.
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.
I need to make sure that my databases are backed up every hour so they can be recovered. What should I be doing? Transaction log backups every hour or differental backups every hour? I assume differental is better because it is cumlative, but would take up more space. Also, how long are they worth keeping around. I was thing for a day until the next full backup is run. Any thoughts?
View 4 Replies View Related
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!!
Hello SQL Server 2005 SE sp1.
Unable to take differential or transaction log backups. Get the error message a full backup need to be down. Have done a full backup. Immediately upon completion of full have tried diff and transaction log. Still no luck
Other databases on server are fine. Full backup will restore.
Thanks,
Joe
Hi,
I need to dump transaction log every night. Before I do that I'd like to check those open transactions and kill the ones not part of sa or SQL server dba's activity. How can I achieve this?
Thanks in advance.
May
SQL 7.0 SP1 on NT 4.0 EE
Thru maintenance plan I backup my DBs every night and the T-Logs every hour.
Now I have to set the option "select into/bulk copy" on one DB.
I schedule the differential backup every 3 hour with option "overwrite existing media", wich is, in my case, one file on disk.
My sequence of T-Logs is valid even if a non logged operations occurs?
If I have to restore this DB can I use the last full backup + the differential backup + all the logs in between?
example:
22.00 full db backup
08.00 t-log
09.00 t-log
10.00 t-log
10.30 diff backup
11.00 t-log
12.00 t-log
13.30 diff backup
14.00 t-log
15.00 t-log
Or my log are unusuable because the non logged operation?
Thank you very much.
I trying to created a Differential backup and I get the following error. Can anyone help?
The volume on device 'd:MSSQL7BACKUPCPIDATABKUP.BAK' is not part of a multifamily (RAID) media set. Use WITH FORMAT to form a new RAID set. [SQLSTATE 42000] (Error 3259) Backup or restore operation terminating abnormally. [SQLSTATE 42000] (Error 3013). The step failed.
Thanks
I'm trying to create a differential backup job that run hourly and that creates a different differential files. Ext. dbfilename1am, dbfilename2am, dbfilename3am ect... Can I do this with one job? Are do I have to create a differential backup job for each hour?
Thanks
Hi,
I've defined a maintenance plan in SQL2005, which creates a differential backup of a DB daily. Suppose I'm having differential backups from May, 10 to May, 14 but backup files of May 12 and May 13 are lost (deleted unexpectedly). Am I losing some data, if I restore from backup file of May 14?
Thanks & Regards,
Hello:
I am working with an application in mssql 65.5, with sp4.
I have the database option 'truncatelog on checkpoint' set, there are no transaction log dumps taken at this time.
We plan now that y2k is over to upgrade to sp 5a. I am not not sure the new configuration
parameter 'logLRU buffers'(I don't have the sp5a readme text with me now) in our situation.
Here is our situtation with the transaction logs: The log, mostly with month-end high actvity,
fills up when long-running, high activity transactions are run.
The log gets to 100% sometimes rather quickly and sometimes near that or above 80%easily.
We check with dbcc open tran and there are no current transaction running. We expand the log just a little.
But it still shows 100@ used when we run dbcc sqlperf (logspace).
Here's the rub: when we try to dump the log, with wither or both back-to-back: dump tran abcdb
with truncate_only and then dump tran with no_log still nothing happens.
Sometimes we stop and start the mssql server and that helps but not always and sometimes when
we are really desperate we stop/start the NT server box(at off hours). Sometimes, the transaction log
reduces to nearly 0% used when we run dbcc sqlperf (logspace) and sometimes not. So we run dump tran
a couple of more times. We wait for several minutes usually to if the dump tan started and if it shows up
under EM under curent activity
This is becoming very frustrating and dangerous as well.
1) has any one had similar experiences with mssql 6.5 sp4?
2) Can anyone advise what we can do to more easily to dump the transaction log? Are we doing
any thing really wrong?
3) Would upgrading to sp 5a really help or should we just start planning upgrading to mssql 7.0?
Any suggestiosn you can furnish will be helpful. Thanks.
David Spaisman
I have a transaction log that is 80% full and will not dump. I have used the "dump transaction dbname with no_log" command. It return the usual "This command did not return data, and it did not return any rows". However, this didn't do anything. The transaction log is still full. I don't want to restart the server if I don't have to. Any ideas?
View 5 Replies View Relatedis there any way to monitor the space utilisation of log space and if it crosses 60% or above, dump the transaction log, effectively....
i tried some of the things, given below.
1. script to monitor the space used of log using dbcc sqlperf(logspace) and check if crosses 60 % and dump the transaction into disk file and execute this script through a schedule task running every minute.
2. same result thro using sql server performance monitor.
I need to replication a server database out side a firewall. But can't change the server configuring for replication, so replication is out. So I wanted to know if I have a full backup of every db send to me every 24hrs. W/ differential every hr, will the restoring process work on the restoring server? Should I restored the full 1st? I'm not sure if the restoring of the Differential will work. Any help on the steps to take, to get this to work with backups & differential will be greatly appreciated.
Thanks Reggie
Hello,
I'm trying to run a differential backup on our new 7.0 box. It fails with an error message number 3242 "The file on Device 'E:MyFile' is not a valid Microsoft Tape Format backup set."
Why "Tape Format" if I said "Backup database [mydb] to disk"?..
When I run exactly the same query without "Differential" I got a full db backup.
Am I doing something wrong?
Thank you,
Anastasia.
Differential back up failed , verify the network error 51
View 2 Replies View RelatedWhen a new scheduled job is created for a Differential backup, the file specified in the Destination folder is automatically created by SQL Server. After the first time the job runs, is there a way to configure SQL Server to give each Differential file a unique name, including the timestamp (i.e. similar to Full Backup jobs)? I noticed my only options are 'Append to File" and "Overwrite Existing File." If I choose to enable "Backup Set Expiration," the backup job will not run, because it wants to append/overwrite the filename specified.
View 1 Replies View RelatedHi Guys I need a samll help to create bat file for differential backup
SQL IN Minds
Hi Guys I need a samll help to create bat file for differential backup
SQL IN Minds
Hi,
Im trying to restore the differential backup,I have to restore the full backup first and then restore the differential backup.Can any body tell me the code for this?
my program is like this
--for fullbackup
if type=D
begin
restore database databasename
from disk=path
end
--for differential backup
else if type=I
???
I have recently started receiving failures on a differential backup thatpreviously succeeded. Nothing has changed with the structure of the db.Here is the message, any ideas are welcomed. Thanks.Executed as user: fsafood-netisqlservice. The backup data in'E:SQL_BackupsBiz_SalesBiz_Sales_Diff.bak' is incorrectly formatted.Backups cannot be appended, but existing backup sets may still beusable. [SQLSTATE 42000] (Error 3266) BACKUP DATABASE is terminatingabnormally. [SQLSTATE 42000] (Error 3013) Associated statement is notprepared [SQLSTATE HY007] (Error 0) The media family on device'E:SQL_BackupsBiz_SalesBiz_Sales_Diff.bak' is incorrectly formed. SQLServer cannot process this media family. [SQLSTATE 42000] (Error 3241)VERIFY DATABASE is terminating abnormally. [SQLSTATE 42000] (Error3013). The step failed.*** Sent via Devdex http://www.devdex.com ***Don't just participate in USENET...get rewarded for it!
View 1 Replies View RelatedI create a full backup followed by daily differential backup, when I restore database from the fifth or later differential item, I get the following Error Message:
System.Data.SqlClient.SqlError: This differential backup cannot be restored because the database has not been restored to the earlier state. (Microsoft.SqlServer.Smo)
It seems that there is an error when the fifth differential backup occurred, It's a disaster, how can I do, help!
Where can I find more about Multibase Differential Backups? I searched through BOL and MSDN (http://msdn2.microsoft.com/en-us/library/ms178046.aspx) but there is too few information (missing sample, backup syntax for selecting differential base).
Is it possible to have two (or more) bases for differential backup for one database?
How to preform such backups?
Hi, I am trying to set up an auto dump for Transaction log using performance monitor ( Log space used(%) )... Although I followed the steps, it did not work... can anyone tell me what am I doing wrong ?
1. create an error # using Server/message/New etc...
2. Defined sql exec alert : right click sql exective/manage alerts/operators..
3. Defined performance monitor using add to alert and set Alert if radio botton to over %80.and Run_Program on Alert: c:mssqlinnE 5555 /T /S servername
then I inset 2000 rows is a table I still get :
Msg 1105, Level 17, State 1
Can't allocate space for object 'publishers' in database 'test' because the 'default' segment is full. If you ran out of space in Syslogs, dump the transaction log. Otherwise, use ALTER DATABASE or sp_extendsegment to increase the size of the segment.
I thought what I did is the right thing to do, but it seems that I am doing something wrong, Please help.
Thanks
Ali
I recently started using Differential backups. They are working but are growing in size a lot quicker than I expected.
The backups are growing by 2.5GB every day although the total size of all
transaction backups is under 350MB. I would have imagined that the total transaction log backups would be a good indicator of total database changes and therefore the differential backups would approach this figure.
Please explain!
Can we take differential backup of Master databae?
If yes please give me details how?
if No Please give me details why not?
how it is possible to take differential backup of database automaticaly in sql server 2k?
plz someone help me out.
thanks
Rahul Arora
07 Batch
NCCE Israna,
######################
IMPOSSIBLE = I+M+POSSIBLE
hi seniors ,
I am running sql server 2005 under details
Microsoft SQL Server 2005 - 9.00.3033.00 (X64)
Copyright (c) 1988-2005 Microsoft Corporation
Standard Edition (64-bit)
on Windows NT 5.2 (Build 3790: Service Pack 1)
When i attempt to take differentail backup i receieved following message
"Cannot perform a differential backup for database "abc",
because a current database backup does not exist.
Perform a full database backup by reissuing BACKUP DATABASE,
omitting the WITH DIFFERENTIAL option. [SQLSTATE 42000] (Error 3035)
BACKUP DATABASE is terminating abnormally. [SQLSTATE 42000] (Error 3013)."
when i search this msg on net than i find that it is microsoft bug 863 so i found hotfixes
about this problem and tried to install but unable to install (On installation screen select feature i am unable to click on check box)
Can any one help me regarding to this issue .And more is.. full back of db "abc" exists and i never changed its location nor rename file name.
Regards
When we do a full backup the .bak file is 700MB but in the meanwhile our differential backup has grown to a size of 20GB. The backup set expires in 1 day and if the backup file already exists we "append" to it.
What we basically want is a differential backup for one day only. I realize that in SQL Server 2005 you could add a "Clean up" task but that is to delete files but because we only have 1 .bak file for the differential backup this is not an option.
If we set to overwrite the backup file if it already exists what does this mean? Assume that we run a differential backup every hour, does this mean that the differential backup file will be overwritten every hour?
How can we make sure that we have a differential backup every hour and keep only the differential backups for the last 24 hours?