Click here to monitor SSC
SQLServerCentral is supported by Redgate
 
Log in  ::  Register  ::  Not logged in
 
 
 


Adding Secondary Data Files (ndf)


Adding Secondary Data Files (ndf)

Author
Message
Motomoto
Motomoto
SSC-Enthusiastic
SSC-Enthusiastic (119 reputation)SSC-Enthusiastic (119 reputation)SSC-Enthusiastic (119 reputation)SSC-Enthusiastic (119 reputation)SSC-Enthusiastic (119 reputation)SSC-Enthusiastic (119 reputation)SSC-Enthusiastic (119 reputation)SSC-Enthusiastic (119 reputation)

Group: General Forum Members
Points: 119 Visits: 159
I have a 310GB mdf for my warehouse database. I have just added three more data files to it in order to distribute the data. Now, what do I need to do to ensure data is been written to the new files? What should the size of each new datafile be? Please advice.
GilaMonster
GilaMonster
SSC-Forever
SSC-Forever (47K reputation)SSC-Forever (47K reputation)SSC-Forever (47K reputation)SSC-Forever (47K reputation)SSC-Forever (47K reputation)SSC-Forever (47K reputation)SSC-Forever (47K reputation)SSC-Forever (47K reputation)

Group: General Forum Members
Points: 47263 Visits: 44392
If they are in the primary filegroup, new data will be automatically written to them. SQL will not however re-balance existing data. Read up on proportional fill for how the data will be distributed.

As for how big they are, well, how big do they need to be for the future growth of your database?


Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

We walk in the dark places no others will enter
We stand on the bridge and no one may pass


SQL Galaxy
SQL Galaxy
Ten Centuries
Ten Centuries (1.2K reputation)Ten Centuries (1.2K reputation)Ten Centuries (1.2K reputation)Ten Centuries (1.2K reputation)Ten Centuries (1.2K reputation)Ten Centuries (1.2K reputation)Ten Centuries (1.2K reputation)Ten Centuries (1.2K reputation)

Group: General Forum Members
Points: 1220 Visits: 3465
For adding new data files (ndf or mdf) in primary filegroup, application might be gets slow performance due to round robin seraching data from different datafiles. Are you any specific reason for adding new data files?
GilaMonster
GilaMonster
SSC-Forever
SSC-Forever (47K reputation)SSC-Forever (47K reputation)SSC-Forever (47K reputation)SSC-Forever (47K reputation)SSC-Forever (47K reputation)SSC-Forever (47K reputation)SSC-Forever (47K reputation)SSC-Forever (47K reputation)

Group: General Forum Members
Points: 47263 Visits: 44392
ananda.murugesan (8/30/2012)

For adding new data files (ndf or mdf) in primary filegroup, application might be gets slow performance due to round robin seraching data from different datafiles.


Unlikely to be noticeable unless you have lots of files (lots >>> 4) and the data is on disk not in memory


Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

We walk in the dark places no others will enter
We stand on the bridge and no one may pass


Go


Permissions

You can't post new topics.
You can't post topic replies.
You can't post new polls.
You can't post replies to polls.
You can't edit your own topics.
You can't delete your own topics.
You can't edit other topics.
You can't delete other topics.
You can't edit your own posts.
You can't edit other posts.
You can't delete your own posts.
You can't delete other posts.
You can't post events.
You can't edit your own events.
You can't edit other events.
You can't delete your own events.
You can't delete other events.
You can't send private messages.
You can't send emails.
You can read topics.
You can't vote in polls.
You can't upload attachments.
You can download attachments.
You can't post HTML code.
You can't edit HTML code.
You can't post IFCode.
You can't post JavaScript.
You can post emoticons.
You can't post or upload images.

Select a forum

































































































































































SQLServerCentral


Search