Multiple Data Files && Locations
Oct 23, 2007
What is the recommendation for having multiple data files ? I've read 1 per CPU etc... some say keep it all in one data file.
How do multiple sql data files help when they are located in the same raid group/single volume ?
This is the setup that I have:
4 CPU box with 2x P400 array controller to 2x MSA10 exclosure (for data only, tempdb,logs,backups are on other arrays)
one array controller per enclosure. single big RAID 10 volume on each ( or should I do 4-4-2 separation).
(In single big raid 10, All disks would help for performance of each query... I don't want to create separate raid groups, mostly due to growth constraints in the future, am I wrong ?)
How should I split database across these two enclosures ? one,two data files on each or more ?
How would this look in OLAP vs OLTP scenarios ?
Thank you.
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Dec 14, 2005
Hi,
I'm fairly new to SQL, waiting on a course on how to use it, but wanting to get stuck it.
I was wondering how I can get SQL to copy a file, say in Access, from one location to another.
This would be part of my job with delivering data extracts users.
Many thanks in advance
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Oct 25, 2007
I have a maintenace plan that copies production backup files in DR server. The production is mission critical and runs 24/7. We have a round the clock backups. Backups include full backup, differential backups and log backups.
To secure these backup files, I was asked to keep these files in different server at the same time as it goes to DR Server. As I am using maintenace plan for scheduled backups that go to DR server and I had no idea how to incorparate copying these files to another server in the same maintenence plan. I came up with idea using xp_cmdshell stored proc that I attached on the maintenace plan in executeT-SQL statement task. The statement looks like
Exec master..xp_cmdshell 'copy e:DRbackup*.bak \fgh-sql16ackup$'
Above statement copy all backup files on DR server and takes these to remote server called fgh-sql16.
My question here is ....are there any other effective methods to copy backup files simultaneously to different servers via maintenace plan.
Thanks all
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Oct 23, 2015
I am looking to create an SSRS report based on multiple locations. There will be one report that presents a summary of all reports, and then individual report for each location.Instead of creating 2 separate reports, is it possible in SSRS to display different datasets based on the parameter selected?
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Jul 20, 2005
Hello all. Before my arrival at my current employer, our consultantsphysically set up our MSSQL 7 server as follows:drive c: contains the mssql enginedrive d: contains the transaction logdrive e: contains the data filesNo filegroups were set up and the data files consist of only 1 largephysical file. Currently, our data file is >10GB. When I was trained onthe physical aspects of sqlserver, I was told to never create physical files[color=blue]> 2048MB each. If I did, I could expect inefficient physical storage of[/color]data and slower performance (due to the OS).Our server has 2 RAID-5 arrays. Drive c: and e: are located on the firstarray and drive d: on the second. We're running Windows 4.0 NT Server SP6with NTFS.Can someone comment on the use of 1 single large data file vs. more smallerdata files?
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Jan 25, 2005
We have a large Database (91 GB) that is currently in one large data file. Now that we have muliple disk arrays I can split that up on I would like to have a couple data files. My question is, what is the best way to split this up? Should I keep one primary file group and just create another file, or should I create a file group for indexes and put those on that? This database is used for reporting only so it doesn't really have any writes being done on it.
Thanks much.
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Sep 27, 2006
First of all i do not know whether this is the right form to ask the question Let me describe the scenario iam using Iam generating xml files at a particular place and sending them to a server xml1|--------------------->dataset1------------------------------>adapter1.update(dataset1)xml2|----------------------->dataset2----------------------------->adapter2.update(dataset2)xml3|----------------------->dataset3------------------------------>adapter3.update(dataset3) all the three updates should happen in only one transaction if any one of the update fails then the transaction should rollbackcan anyone tell me a way to do iti am desperately in search of any ways to do it can anybody help please
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Aug 29, 2015
there are several remote locations where sql is running, my company has asked me to find a way to collect all the data from the remote locations to a central location automatically,for example day to day data should be synced at night time from 2am to 7 am and it should be compressed automatically before data transfers to the central location. NOTE there is no domain only standalone workstations
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Nov 12, 2014
I read , When sql server Database having multiple data files within single filegroup then sql server writes data in multiple proportional file algorithm where the amount of data written to a file is proportionate to the amount of free space in that file, compared to other files in the filegroup.
so if there is no filegroups created and multiple secondary files are attached in databse , is there same way data stored and writes data in multiple files by the same algorithm or any different way.
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May 7, 2014
A little background on what I am trying to achieve first. We are moving to Azure virtual machines and we will have 8 disks on the SQL Server box. I am adding more files to the primary file group and each file will go on its own drive. I am then rebalancing data across these files by rebuilding all of the indexes on the tables which is working fine. No problems so far all is good.
I now have an additional problem. If there is a lob or blob column on the table, rebuilding the clustered index and all the non clustered indexes doesn't rebalance the blob or lob data across the disks such as it does with in row data.
I cannot find any articles on rebalancing lob or blob data because all the articles say to move to a new file group. I do not want a new file group, I just want to use the primary file group where the data already resides, and just redistribute it evenly in the same way that I can in row data which is working fine.
One solution I thought about was to BCP data out of the table, truncate the table and then BCP back into the table which I imagine would have the desired effect of distributing the data evenly over the files.
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Jun 16, 2015
I have a requirement where in i have around 15 different flat files , filenames are fixed but folder path can be changed(i think i should use a variable for folder path). These 15 files data should go to their respective tables in the database.
Whether I need to create separate data flow task for each file or separate package? In addition to these, example : while importing product data into product table, if product ID already exists, we need to ignore it and upload only the new records.
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Jun 27, 2006
I have a couple of hundred flat files to import into database tables using SSIS.
The files can be divided into groups by the format they use. I understand that I could import each group of files that have a common format at the same time using a Foreach Loop Container.
However, the example for the Foreach Loop Container has multiple files all being imported into the same database table. In my case, each file needs to be imported into a different database table.
Is it possible to import each set of files with the same format into different tables in a simple loop? I can't see a way to make a Data Flow Destination item accept its table name dynamically, which seems to prevent me doing this.
I suppose I could make a different Data Flow Destination item for each file, in the Data Flow. Would that be a reasonable solution, or is there a simpler solution, or should I just resign myself to making a separate Data Flow for every single file?
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Aug 14, 2012
I am trying to restore multiple .bak backup SQL database files onto a new server. However, I have found that it will not allow me to restore multiple databases at once. Is there a way to do this so that I do not have to manually upload one at a time? I tried adding all the .bak files at once to the backup device window but it only did the first one listed. It would be so much easier to restore them all at once so that I do not have to continue this manual process. I am restoring them via device.
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Feb 15, 2008
I need to be able to bulk insert a bunch of tables from their corresponding flat file. I have created an XML file (see below) which has the file name/table name pair at each node. I then created a ForEachLoop task and used the Node enumeration type and the following OuterXpathString: ReferenceFiles/File. At this point I get lost. How do I pass the 2 inside node values (file name and table name) to variables which I can then use as expressions for the bulk insert task inside the Foreach?
Here is XML file:
Code Snippet
<ReferenceFiles>
<File>
<FileName>Ref_Categories.txt</FileName>
<TableName>Ref_Categories</TableName>
</File>
<File>
<FileName>Ref_Configs.txt</FileName>
<TableName>Ref_Configs</TableName>
</File>
</ReferenceFiles>
Thanks.
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Nov 29, 2007
I used the data export wizard to export a single table to a single flat file (multiple wasn't allowed). I saved the package as a *.dtsx file which I'm attempting to edit to add the additional tables.
Creating additional sources is fairly easy copy of the first source and change to the table name.
I've tried copying the destination connection and changing to a new text file, but can't get past having to add each column manually to the new destination.
How can I duplicate the mapping that must be taking place in the wizard in the *.dtsx editing environment?
This seems like a simple / common task, but I've been unable to find a solution.
Thanks, Richard
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Apr 29, 2014
Why shrinkfile empty file does not redistribute data evenly in the primary file group with multiple files:
Please run the script attached to see what the end result is.
This is what I set up last night on my test machine.
1) Create database [FGTest] size 200MB
2) Create table called TEST on primary
3) Insert 40MB of data into test
4) Create another file group called temp in primary size 200MB
5) Shrinkfile('FGTest',emptyfile) so that all data is transfered from FGTest into temp file group.
6) Add another 2 files called DATA2 and DATA3. Both are 200MB.
7) We now have 3 empty files that I want data distributed evenly on. FGTest, DATA2 & DATA3
8) Shrinkfile('temp',emptyfile) to move all the data from temp over the 3 file groups evenly
I would expect at this stage to have the following:
FGTest = 13MB,
DATA2 = 13MB,
DATA3 = 13MB
(40MB of data over 3 files should be about 13 MBish in each file)
What I actually end up with is this:
FGTest = 20MB
DATA1 = 10MB
DATA2 = 10MB
It looks as though SQL Server is allocating 50% of all data to the original file and then 50% evenly over
the remaining files in PRIMARY.
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Jun 1, 2007
Hi,
I have searched but not found quite the best way to look at this so far..
I have an application that outputs data to several text files (up to 30). These have commonality by an object name, but then contain completely different column data.
In DTS I had each of the source text file connections going to one OLE DB connection and then individual transform data tasks pointing to the one OLE DB connection.
Looking at SSIS, it would appear that I would need to have one source and one destination for each of these and therefore 30 parallel data flows?
Just wondering if there is a neater way of doing this??
It is a regular data import that happens a few times a day - the text files are named the same as the SQL tables - ie app_userdata.txt goes to app_userdata table.
Hope that explains ok and thanks in advance.
Mike
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Aug 4, 2004
I am trying to write (my first, unfortunatly) DTS, and am having some problems.
I need to be able to import multiple flatfiles (all in the same format, just with different schema), each one going into a different table. I have written an application to call my DTS, sending it variables for the tablename and the filename. This works fine when I test it on a single flatfile.
My problem is, the Tranformation object does not reset after each DTS call, so I get "Column does not exist" errors after the first successful import. I can go into the DTS Manager and reset the Transformation options, but that would defeat the purpose of automation. Is there anyway to reset, or another technique, the Transformation object so that it will continuosly work on files that use different schema?
I am very new at DTS, so please consider me "ignorant" when replying.
Thanks in advance.
- Jordan
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Jan 9, 2015
I proposed on a new server that we separate Data Files, Log Files, tempDB, Backups, etc. onto separate LUNS on a SAN with High Speed Solid State Drives.I was told that with the new technology with solid state SAN's that it would decrease performance and that it did not work the same way as it did when you had RAID 5's etc.I thought that if things were cared out correctly by a SAN Administrator they would know how to configure for optimal performance.
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Apr 18, 2002
Hi,
Just a quick one.
Is it advisable to have the data files and log files for a database in the same folder or different folders and what is the difference if any.
Thanks for the advice.
Stevfe
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Dec 17, 2003
I have multiple .sql files, exe each one manually is a pain, so how do you run multiple .sql files all at once? Beside creating a batch file, are there t-sql commands that could execute .sql files?
Thanks!
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May 18, 2004
I have a rather large sale transaction DB. Basic header, and detail tables. I am providing a third party company with daily sales information, and I need to give them back data from about 8 or 9 months ago. I currently have a DTS package that gets sales for the current day, but since I have to go back, I have to manually edit the query in the DTS package, and change the date range...UNLESS ...
Blah, blah, blah. The problem is that they can only take the data in Daily files. So, there would be ONE file for each day. I really don't need to be manually running these jobs, so I'm wondering if someone could point me to a way of writing a package (maybe ActiveX, not sure) that would run through a loop, basically, of dates, and create a seperate file for each day. Versus having to edit a generic DTS package, and changing the date range 350 times...
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Jan 24, 2007
I need to restore a database that has a bak file and many log files. Is there a way I can do this with one recovery step?
Or do I need to use a different restore object for each file?
MTmace
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Jun 7, 2006
Using an expression to set the log filename to include the date and time results in 3 log files being created.
Ummm. Why? I only ran the package once. Is SSIS not sharing my log file connection among the different components?
On first thought my workaround would involve using a script task to "set" the log file name to a variable and use an expression to set the log connection to the variable. But the problem with that is that logging starts BEFORE the script task is run...
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Apr 20, 2007
I have a job with a single step that executes a stored procedure that performs the following steps:
1. Checks for the existance of a file A in a folder A
2. If it exists,
a. executes the cmdshell to run a DTS package to drop a table, recreate it and load the data in the file A to table X
b. runs other stored procedures that use the data in table X to create other tables Y and Z
c. executes the cndshell to remove and rename the file A from Folder A into Folder B
What I'd like to do is use this same stored procedure if possible, but create a job or another store procedure that would loop thru and process multiple files in Folder A instead of just one.
Any suggestions would be greatly appreciated
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Jul 17, 2007
Hi,
I have about 300-400 XML files I want to load in my SQL database (2005). The following code will load one (1) file. How do i do a mulitple collections?
INSERT INTO MEL (DATA) SELECT * FROM OPENROWSET (BULK'C:TempCHAPTER1.xml', SINGLE_BLOB) AS TEMP Thanks,
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Sep 13, 2000
Usually, our in house ERP software has 1 database and 1 database file. After an upgrade from MS SQL 6.5 to MS SQL 7.0 I have a database who's properties show that it is made up of multiple datafiles. What is the easiest and safest method to return this database to only have 1 datafile?
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Sep 8, 2000
Is it possible to take a text file that contains multiple record types through the Data Transformation Service in MS SQL 7.0 and load each different record type into a seperate table?
Thanks in advance.
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Sep 3, 2007
I have 8GB of text files which are basically log files from the past few years.
There is 24 text files per directory which are labeled for every day (so they are not all in 1 folder).
It would make reading them much easier if I could import them to SQL but I only seem to be able to import 1 at a time? (with the wizards :eek: )
Surely there is a way to mass import without all the costly applications that google searches give me?
cheers :P
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May 22, 2008
When having multiple files for log, do they get filled one after the other (like Oracle) or proportionately fill?
------------------------
I think, therefore I am - Rene Descartes
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Nov 4, 2014
I have a script which imports the contents of a csv file from our CRM system and updates a table in my database. This works OK but the problems I have are that a) sometimes there is more than one file in the folder, and b) that I wish to move any csv files that have been imported into an archive folder. The csv files arrive with a time/datestamp and I currently rename them manually to FREXPORT before importing (the name is in the format FREXPORT_20141101_1217.csv).How do I:
1) get it to process the file without me having to manually rename the file(s) each time,
2) if there is more than 1 file in the folder process all the files and 3)move the correctly processed files to an archive folder which is: importarchive?
Ultimately, I would like the script to be run as a scheduled job, so it also has to deal with the fact that sometimes there will be no files to import too.
[code]create table #import
(worknumber nvarchar(12), date_done smalldatetime)
BULK
Insert #import
from 'fork04-hq-dc01dataimportFREXPORT.csv'
[code]....
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Dec 18, 2007
Hi i have a FTP task on my SSIS package where i want to select 3 files from a directory, this directory already contains other files but i only want 3 of them how do i only pull down the 3 files from the FTP site i can't seem to find a option on the FTP task to select what files i want from the direcroty.
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Aug 5, 2005
I have over three hundred text files that I need to import to SQLServer.Each is in the exact same format.I want to import tham as seperate tables.Is there any way to do it in one process?Regards,Ciarán
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