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Author Data File Size
Samir

2002-10-30, 11:23 am

Lets say i have 4 36 GB physical disks in a single RAID
and this is the only RAID available for DATA files.

a) What is the maximum size of data file i can have?
Is there a limit to the size it can grow?
If it becomes too big will Windows NT be
able to handle it efficiently?

b)IS it better to have 4 data files or its better to
have only one data file?

Here is what i read in one of the KB article which i
thought was very intresting.

"File Sizing and Use of AutoGrow
It is recommended that SQL Server files be sized such that
there will be at least three equally sized SQL Server
files per Redundant Arrays of Inexpensive Disks (RAID)
array and these files should be set at maximum size to
which they are expected to grow. Use autogrow to cover
sizing emergencies. Defining three files is helpful for
speeding up data redistribution if it is determined that
more I/O processing power is required and a new RAID array
needs to be brought online."

Any insights will be helpful as i'm gettting confused
between this KB and the responses.


Tibor Karaszi

2002-10-31, 5:23 am

> a) What is the maximum size of data file i can have?

32TB


> Is there a limit to the size it can grow?


The max size.


> If it becomes too big will Windows NT be
> able to handle it efficiently?


No real limit that I'm aware of.


> b)IS it better to have 4 data files or its better to
> have only one data file?
>
> Here is what i read in one of the KB article which i
> thought was very intresting.

<snip>

As I mentioned before, that information is incorrect. I would use few files, but more decide on
file size from a practical viewpoint (not performance).
--
Tibor Karaszi, SQL Server MVP
Archive at: http://groups.google.com/groups?oi=...ublic.sqlserver


"Samir" <samir.pandit@veripsan.com> wrote in message
news:c91001c28032$7b51e540$39e
f2ecf@TKMSFTNGXA08...
> Lets say i have 4 36 GB physical disks in a single RAID
> and this is the only RAID available for DATA files.
>
> a) What is the maximum size of data file i can have?
> Is there a limit to the size it can grow?
> If it becomes too big will Windows NT be
> able to handle it efficiently?
>
> b)IS it better to have 4 data files or its better to
> have only one data file?
>
> Here is what i read in one of the KB article which i
> thought was very intresting.
>
> "File Sizing and Use of AutoGrow
> It is recommended that SQL Server files be sized such that
> there will be at least three equally sized SQL Server
> files per Redundant Arrays of Inexpensive Disks (RAID)
> array and these files should be set at maximum size to
> which they are expected to grow. Use autogrow to cover
> sizing emergencies. Defining three files is helpful for
> speeding up data redistribution if it is determined that
> more I/O processing power is required and a new RAID array
> needs to be brought online."
>
> Any insights will be helpful as i'm gettting confused
> between this KB and the responses.
>
>



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